26 Years Abrasive Manufacturing
Professional resin bonded abrasive wheel manufacturer.
600,000 PCS Daily Capacity
Stable production capability for global distributors.
OEM & Private Label
Custom size, formula, hardness grade and packaging.
Metal Grinding Discs & Grinding Wheels
DOME manufactures resin bonded metal grinding discs and grinding wheels for steel, carbon steel, stainless steel, cast iron, and other metalworking applications. Our abrasive grinding wheels deliver fast stock removal, consistent finish quality, and long service life across fabrication, construction, shipbuilding, and foundry operations. Available in a full range of diameters, thicknesses, grits, and abrasive grains—with Type 27 depressed center for angle grinders and Type 1 flat wheels for stationary machines.
Dome Abrasives Catalogue
What Are Metal Grinding Discs & Grinding Wheels?
Metal grinding discs and metal grinding wheels are abrasive tools designed for stock removal, weld smoothing, surface preparation, and finishing on ferrous and non-ferrous metals. Unlike cutting discs—which separate material—grinding discs for metal remove surface material through friction, using abrasive grains bonded in a resin matrix to grind, shape, and refine workpieces.
Metal grinding wheels are available in two primary shapes: Type 27 (depressed center) for angle grinder use, allowing grinding at a shallow angle on flat surfaces, and Type 1 (flat) for bench and pedestal grinders. Abrasive grinding wheels are classified by grit size—coarse (16–30) for rapid removal, medium (36–60) for general-purpose use, and fine (80–120) for finishing.
Our resin bonded abrasive wheels use synthetic resin as the bonding agent, offering the optimal balance of cut rate, wheel life, and safety. This bond type withstands the high temperatures generated during metal grinding while maintaining grain retention for consistent performance. Abrasive grinding discs are available in aluminum oxide for carbon steel, zirconia for stainless and high-strength alloys, ceramic for hardened materials, and silicon carbide for cast iron and non-ferrous metals.
Grinding applications span weld blending, beveling, surface preparation, deburring, and heavy stock removal—supported by a full range of diameters (100mm–230mm), thicknesses (3mm–8mm+), and grits to match every grinder type and metalworking requirement.
Structure of Resin Bonded Metal Grinding Discs
Abrasive Grain – Microscopic cutting teeth embedded in the disc. As the wheel rotates, each grain shears away tiny metal chips. Grain type, size, and concentration directly control cutting speed, surface finish, and material compatibility.
Resin Bond – The structural matrix that holds grains in place. Unlike vitrified or metal bonds, resin offers controlled flexibility: it retains grains during cutting but releases dull grains at a calibrated rate, exposing fresh sharp edges underneath. This self-sharpening action maintains cutting efficiency throughout the disc’s life. Bond hardness adjusts to the material—softer bonds for hard metals (faster grain release), harder bonds for soft metals (longer retention).
Fibreglass Reinforcement – Multiple layers of fibreglass mesh embedded in the disc provide the tensile strength to withstand extreme centrifugal forces at high RPM. Acting like rebar in concrete, reinforcement adds structural integrity while allowing the disc to remain thin for efficient grinding. This is what makes resin bonded discs safe for high-speed angle grinder use, certified to EN12413 standards.
Grinding Discs for Different Metals
Every metal responds differently to grinding—heat conductivity, hardness, and alloy composition all influence abrasive selection. Choosing the right grinding disc for your specific workpiece ensures faster stock removal, cooler operation, and a superior surface finish.
Grinding Discs for Steel
Our grinding discs for steel are engineered for general-purpose stock removal on mild steel, structural sections, and fabrication work. A steel grinding disc uses aluminum oxide grains that fracture at a controlled rate, continuously exposing fresh cutting edges for consistent performance. For daily workshop use, grinding wheels for steel deliver reliable material removal on beams, plates, and angle sections.
Carbon Steel Grinding Discs
Carbon steel grinding discs are the workshop standard for low-carbon and medium-carbon steel applications. Our grinding discs for carbon steel use durable aluminum oxide abrasive in a resin bond, offering the right combination of cut speed and wheel life. A carbon steel grinding wheel handles everything from weld grinding to surface blending, while the grinding wheel for carbon steel delivers dependable performance at an economical price point.
Stainless Steel Grinding Discs
Stainless steel work-hardens and discolors under excessive heat—demanding a grinding disc that manages friction carefully. Our stainless steel grinding discs use zirconia or ceramic grains that micro-fracture under heat, preventing glazing and keeping the wheel cutting cool. A grinding disc for stainless steel is formulated with high-purity INOX bonds to prevent iron contamination, preserving the material’s corrosion resistance.
Cast Iron Grinding Discs
Cast iron’s high carbon content and hard surface structure require a grinding wheel that stays sharp under heavy load. Our cast iron grinding discs use silicon carbide grains—harder than aluminum oxide—to effectively cut through this brittle material. A grinding disc for cast iron maintains its edge against abrasive graphite flakes, delivering consistent stock removal on engine blocks, pipes, and machine bases. The cast iron grinding wheel is specifically formulated to resist loading and glazing on this challenging material.
Alloy Steel Grinding Discs
Alloy steel grinding discs are engineered for high-strength and hardened steel applications where standard abrasives fall short. Our grinding wheels for alloy steel use ceramic grains that micro-fracture at a microscopic level, generating thousands of fine cutting points for cooler, more efficient grinding. A grinding disc for hardened steel minimizes the heat-affected zone and prevents post-grinding cracking—essential for tool steels, die steels, and high-alloy components. The alloy steel grinding wheel delivers the precision and performance that demanding applications require.
Metal Grinding Discs by Abrasive Grain
The abrasive grain determines how a grinding disc cuts, wears, and handles heat. Selecting the right mineral for your workpiece ensures faster stock removal, cooler operation, and longer wheel life.
Aluminum Oxide Grinding Discs
Aluminum oxide grinding discs are the industry standard for general-purpose metal grinding on carbon steel and structural sections. Aluminum oxide grinding wheels fracture at a controlled rate, continuously exposing fresh cutting edges for consistent stock removal. For everyday fabrication, aluminum oxide grinding discs for metal deliver reliable performance, while aluminum oxide wheels for steel offer the durability needed for weld smoothing and surface preparation. The aluminum oxide metal grinding wheel is the economical choice for workshops seeking dependable, no-fuss grinding.
Zirconia Grinding Discs
Zirconia grinding discs exhibit a unique self-sharpening mechanism that activates under elevated temperatures—preventing glazing and maintaining aggressive cut rates on stainless steel and high-strength alloys. A zirconia grinding wheel micro-fractures as heat builds, continuously exposing fresh cutting edges. For tough materials, zirconia grinding discs for metal offer superior longevity compared to standard aluminum oxide. Zirconia alumina grinding discs deliver the toughness needed for heavy feed rates on Inox and tool steels.
Ceramic Grinding Discs
Ceramic grinding discs feature a sol-gel microcrystalline structure that fractures at a microscopic level, generating thousands of fine cutting points without losing overall shape. Ceramic grinding wheels run significantly cooler than conventional abrasives—critical for heat-sensitive aerospace alloys, hardened tool steels, and nickel-based superalloys. Ceramic grinding discs for metal minimize the heat-affected zone and prevent post-grinding cracking.
Silicon Carbide Grinding Discs
Silicon carbide grinding discs are harder and more brittle than aluminum oxide, making them ideal for cutting through cast iron’s hard, abrasive surface. Silicon carbide grinding wheels maintain their edge against graphite flakes and embedded impurities, delivering consistent stock removal on engine blocks and machine bases. For non-ferrous metals, silicon carbide wheels for metal offer aggressive cutting action without loading on soft, gummy materials.
Types of Metal Grinding Wheels
The shape of a grinding wheel determines how it mounts to your machine, the angle at which you can work, and the types of surfaces you can reach. Selecting the correct type ensures safe operation, optimal stock removal, and consistent results.
Type 27 Grinding Wheels
Type 27 grinding wheels feature a dish-shaped, recessed center that offsets the grinding face forward. This design allows the wheel to work at a 15–30° angle without the grinder’s guard or spindle contacting the workpiece. A Type 27 grinding disc is the standard for right-angle grinders, offering the clearance needed for flat surface grinding, weld smoothing, and beveling. For metalworking, Type 27 metal grinding wheels provide versatile performance on steel, stainless, and cast iron. The depressed center grinding wheel is available in diameters from 100mm to 230mm and multiple thicknesses for light to heavy stock removal.
Type 1 Grinding Wheels
Type 1 grinding wheels feature a completely flat profile with no raised center—classified as straight wheels. A Type 1 grinding disc requires full flange support on both sides, making it the standard for stationary machines. Straight grinding wheels are commonly used on bench grinders for tool sharpening and on pedestal grinders for heavy stock removal. Flat grinding wheels offer maximum contact area for surface grinding, finishing, and precision sharpening where a depressed center is not required.
Heavy Duty Grinding Discs
Heavy duty grinding discs are engineered for the most demanding industrial applications—foundry snagging, large-scale fabrication, and continuous production grinding. Heavy duty grinding wheels feature extra-thick profiles (6mm–8mm) and coarse grits for maximum material removal under extreme conditions. Industrial grinding discs are designed to withstand the highest feed pressures and longest duty cycles without premature wear or structural failure. For maximum productivity, heavy stock removal grinding discs deliver aggressive cut rates on castings, billets, and heavy structural sections. High performance grinding wheels maintain consistent cut rates throughout their extended service life, reducing changeover downtime in high-volume operations.
Quick Selection Guide
| Wheel Type | Shape | Typical Mounting | Primary Application |
|---|---|---|---|
| Type 27 | Depressed center | Angle grinder | Flat surface grinding, weld smoothing, beveling |
| Type 1 | Flat profile | Bench/Pedestal grinder | Sharpening, surface grinding, precision finishing |
| Heavy Duty | Type 1 or Type 27 | Angle grinder / Stationary | Extreme stock removal, continuous production |
Metal Grinding Discs by Size
Grinding disc diameter determines surface coverage, stock removal rate, and machine compatibility. Selecting the right size for your angle grinder ensures efficient material removal and consistent finish quality.
100mm Grinding Disc (4-inch Grinding Wheel)
The 100mm grinding disc (4-inch) is ideal for pneumatic die grinders and compact electric tools. A 4 inch grinding disc excels at surface preparation, rust removal, and deburring small parts. For light fabrication where maneuverability is key, the 4 inch grinding wheel delivers the control you need. The 4 inch metal grinding disc is perfect for accessing confined spaces, while the 100mm metal grinding wheel offers reliable performance on small workpieces.
115mm Grinding Disc (4.5-inch Grinding Wheel)
The 115mm grinding disc (4.5-inch) is the most common size for angle grinders, offering a balance of control and coverage. A 4.5 inch grinding disc handles a wide range of tasks—from weld grinding and deburring to surface preparation on steel and stainless. The 4.5 inch grinding wheel fits most standard angle grinders, making it the workshop workhorse. For daily fabrication, the 4.5 inch metal grinding disc delivers consistent stock removal on structural sections.
125mm Grinding Disc (5-inch Grinding Wheel)
Stepping up to higher-powered angle grinders, the 125mm grinding disc (5-inch) offers deeper reach and greater surface coverage. A 5 inch grinding disc is ideal for heavy weld removal, surface grinding on larger workpieces, and stainless finishing. The 5 inch grinding wheel maintains efficiency while covering more area, while the 5 inch metal grinding disc is the popular choice for metalworking shops needing extra reach without stepping up to a 7-inch grinding wheel.
180mm Grinding Disc (7-inch Grinding Wheel)
The 180mm grinding disc (7-inch) represents the upper limit of portable grinding power. A 7 inch grinding disc is designed for heavy fabrication, beveling plates, and aggressive stock removal on heat-sensitive steel. The 7 inch grinding wheel delivers the balance of surface coverage and manageability needed for 1,400W+ angle grinders. For industrial applications, the 7 inch metal grinding disc is the standard for heavy-duty fabrication and construction sites.
230mm Grinding Disc (9-inch Grinding Wheel)
The 9 inch grinding disc (230mm) is the largest size that fits a hand‑held angle grinder — representing the maximum capacity of portable metal grinding. Designed for 9‑inch industrial‑grade angle grinders (2000–2600W), the 230mm grinding disc delivers the broadest surface coverage and the highest material removal rates available in a hand‑held tool.
Grinding Discs for Different Machines
Every grinding machine delivers power differently—high RPM for hand-held agility, low-speed torque for stationary precision, or continuous load for production runs. Selecting the right grinding disc for your specific machine ensures safe operation, optimal stock removal, and consistent results.
Angle Grinder Grinding Discs
Angle grinder grinding discs are engineered for the extreme rotational speeds (11,000+ RPM) of hand-held tools. Angle grinder grinding wheels feature a depressed center (Type 27) design, allowing the wheel to work at a 15–30° angle for efficient stock removal on flat surfaces. For daily fabrication and maintenance, grinding discs for angle grinder deliver consistent performance on welds, bevels, and surface preparation. Metal grinding discs for angle grinder are available in multiple grits and abrasives—from aluminum oxide for carbon steel to zirconia for stainless—ensuring the right wheel for every material.
Bench Grinder Wheels
Bench grinder wheels are mounted on benchtop grinding machines, offering a stable platform for smaller workpieces and tool maintenance. Bench grinding wheels typically feature a flat Type 1 profile and are available in coarse grit for rapid stock removal or fine grit for finishing. Grinding wheels for bench grinder applications include sharpening drill bits and chisels, deburring small parts, and light surface preparation. Metal grinding wheels for bench grinder are available in aluminum oxide for general steel grinding or silicon carbide for non-ferrous metals and carbide tooling.
Pedestal Grinding Wheels
Pedestal grinding wheels are mounted on floor-standing pedestal grinders, offering greater stability and power than benchtop models. Pedestal grinder wheels are typically larger and heavier-duty, designed for continuous operation and demanding industrial environments. Grinding wheels for pedestal grinder applications include heavy stock removal on large workpieces, off-hand grinding, and snagging in foundry and fabrication shops.
Quick Machine Selection Guide
| Machine Type | Typical Wheel Type | Key Demand | Common Sizes |
|---|---|---|---|
| Angle Grinder | Type 27 (Depressed Center) | High RPM, mobility, versatility | 100–230mm (4–9″) |
| Bench Grinder | Type 1 (Flat) | Precision, sharpening, small parts | 150–200mm (6–8″) |
| Pedestal Grinder | Type 1 (Flat) | Heavy stock removal, continuous use | 200–355mm (8–14″) |
Metal Grinding Disc Applications
Different grinding applications place unique demands on disc selection—from aggressive weld removal to precision deburring. Choosing the right grinding wheel for your specific task ensures efficient material removal, consistent finish quality, and maximum service life.
Grinding Discs for Weld Removal
Grinding discs for weld removal are designed to remove weld beads, smooth joints, and prepare surfaces for finishing. Weld grinding discs typically use a depressed center (Type 27) profile for angle grinder work, with coarse grit for rapid material removal. Weld removal grinding wheels handle bead removal on structural steel and pipe, weld preparation for testing, and spatter cleanup. A grinding wheel for welds requires aggressive grain action and sufficient thickness to withstand side pressure during beveling.
Grinding Discs for Deburring
Grinding discs for deburring remove sharp edges, burrs, and machining marks from cut or machined parts. Deburring grinding wheels typically use finer grits to achieve a smooth, safe edge without removing excessive base material. Metal deburring discs are essential for laser-cut and plasma-cut parts, machined components, and sheet metal edges—preparing parts for coating, assembly, or safe handling.
Grinding Discs for Surface Grinding
Surface grinding discs are used to achieve flat, smooth, and parallel surfaces on metal workpieces. Surface grinding wheels typically feature a straight (Type 1) profile for stationary surface grinders, with medium to fine grits for precision finishing. Grinding discs for surface preparation handle steel plates before welding or coating, remove surface imperfections and scale, and achieve flatness on machined parts.
Grinding Discs for Edge Grinding
Edge grinding discs are used for beveling, chamfering, and edge preparation on plates, pipes, and structural sections. Edge grinding wheels require excellent side-loading resistance and consistent wear characteristics to maintain the desired bevel angle. Grinding discs for beveling handle plate edges for welding, pipe ends for joint preparation, and structural sections for coating or inspection. Grinding wheels for edge preparation deliver profile retention throughout the operation.
Heavy Stock Removal Grinding Discs
Heavy duty grinding discs are designed for foundry snagging, large-scale fabrication, and continuous production grinding. Heavy duty grinding wheels use extra-thick profiles (6mm–8mm) and coarse grits for maximum material removal under extreme conditions. Heavy stock removal grinding wheels handle castings, billets, and heavy structural sections—removing mill scale and surface defects efficiently. Aggressive grinding discs are the first step in any multi-stage grinding process, removing material quickly before moving to medium or fine grits for finishing.
Metal Grinding Disc Grit Guide
Grit size determines material removal rate and surface finish. Lower numbers = coarser grains for faster stock removal; higher numbers = finer grains for smoother finishing.
| Grit | Main Use | Target Keyword |
|---|---|---|
| 24 Grit | Heavy grinding, weld leveling, rust removal | 24 grit grinding disc |
| 36 Grit | General grinding, weld smoothing, surface prep | 36 grit grinding disc |
Metal Grinding Disc Thickness
Grinding disc thickness directly impacts material removal rate, wheel life, and grinding control. Unlike cutting discs—which prioritize thin profiles for narrow kerfs—grinding discs require greater thickness to withstand side pressure, continuous friction, and heavy feed rates. Selecting the right gauge ensures efficient grinding without premature wear or wheel failure.
Grinding Disc Thickness – How Thickness Affects Performance
Grinding disc thickness determines the balance between aggression and durability. Thinner profiles (4mm) offer greater maneuverability for light stock removal and access to confined areas. Thicker profiles (6mm–8mm) provide extended wheel life and withstand the heaviest feed pressures.
Metal grinding disc thickness should be matched to your application:
- 4mm – Light to medium grinding, general fabrication
- 6mm – The industry standard for heavy stock removal on steel, stainless, and cast iron
- 7–8mm – Extreme durability for foundry snagging and continuous production grinding
6mm Grinding Disc
The 6mm grinding disc is the most common thickness for metal grinding applications. Available in diameters from 100mm to 230mm, the 6mm grinding wheel delivers the optimal balance of material removal and wheel life.
6mm grinding disc applications include:
- Heavy weld removal and smoothing
- Surface preparation on structural steel
- Beveling and edge grinding
- Rust and scale removal
A 6mm grinding wheel with coarse grit (24–36) provides aggressive stock removal, while medium grits (46–60) deliver a smoother finish.
Heavy Duty Grinding Disc Thickness – 7–8mm for Extreme Conditions
Heavy duty grinding disc thickness typically ranges from 7mm to 8mm, designed for the most demanding industrial applications. These extra-thick profiles withstand the highest feed pressures and longest duty cycles without premature wear or structural failure.
Applications for heavy duty grinding discs include:
- Foundry snagging on castings and forgings
- Continuous production grinding
- Large-scale fabrication and shipbuilding
- Grinding hard-to-machine materials like high-alloy steels
Quick Thickness Selection Guide
| Thickness | Best For | Key Feature |
|---|---|---|
| 4mm | Light to medium grinding, general fabrication | Maneuverability, access to tight spaces |
| 6mm | Heavy stock removal, weld grinding, surface prep | Industry standard, balance of cut and life |
| 7–8mm | Extreme stock removal, foundry, continuous use | Maximum durability, longest service life |
Metal Grinding Disc Specifications
Every grinding disc is defined by its diameter, thickness, bore size, abrasive grain, and wheel type. Understanding these specifications ensures the right match for your machine and application.
Our standard metal grinding disc specifications cover diameters from 100mm to 230mm with 4mm to 8mm thickness—the industry standard for heavy stock removal. The bore size (16mm or 22.23mm) determines grinder compatibility, while the abrasive—aluminum oxide for carbon steel, zirconia for stainless and alloys—determines cutting performance. Type 27 depressed center wheels are designed for angle grinder use, enabling efficient grinding on flat surfaces.
| Diameter | Thickness | Bore | Abrasive | Type | Application |
|---|---|---|---|---|---|
| 100mm | 4mm/6mm/8mm | 16mm | Aluminum Oxide | T27 | Metal Grinding |
| 115mm | 6mm | 22.23mm | Zirconia | T27 | Stainless Steel |
| 125mm | 6mm | 22.23mm | Aluminum Oxide | T27 | Steel Grinding |
| 180mm | 6mm | 22.23mm | Zirconia | T27 | Heavy Grinding |
| 230mm | 6mm | 22.23mm | Zirconia | T27 | Heavy Duty |
Our Metal Grinding Disc Products
Choose the right grinding disc for your metalworking application from our range of resin bonded abrasive discs. Each product is engineered for specific materials and grinding tasks.
115mm Zirconia Grinding Disc
| Diameter | Thickness | Abrasive | Application |
|---|---|---|---|
| 115mm (4.5″) | 6mm | Zirconia Alumina | Stainless steel grinding, heavy weld removal, surface preparation |
Zirconia alumina abrasive delivers self‑sharpening performance on tough materials. Ideal for 304 and 316 stainless steel fabrication, sanitary equipment manufacturing, and general stainless surface finishing. The 115mm size fits standard 4.5‑inch angle grinders and offers the best balance of control and material removal for workshop use.
125mm Aluminum Oxide Grinding Disc
| Diameter | Thickness | Abrasive | Application |
|---|---|---|---|
| 125mm (5″) | 6mm | Aluminum Oxide | Carbon steel grinding, structural steel work, general metal fabrication |
Aluminum oxide is the industry standard for carbon steel and structural steel grinding. This 125mm disc delivers consistent performance on mild steel, structural beams, and steel plate. The 5‑inch size is the North American market standard, offering greater surface coverage than 115mm while maintaining good manoeuvrability.
230mm Heavy Duty Grinding Disc
| Diameter | Thickness | Abrasive | Application |
|---|---|---|---|
| 230mm (9″) | 7mm | Zirconia Alumina | Heavy‑duty weld removal, foundry work, shipbuilding, thick plate grinding |
The 230mm disc is the largest size for hand‑held angle grinders, delivering maximum material removal rates for heavy industrial applications. The 7mm thickness provides extra durability for continuous high‑pressure grinding on castings, structural steel, and ship hull plates. Designed for 9‑inch high‑power angle grinders (2000W+).
100mm Ceramic Grinding Disc
| Diameter | Abrasive | Application |
|---|---|---|
| 100mm (4″) | Ceramic Alumina | Hard‑to‑grind metals, alloy steel, tool steel, stainless steel |
Ceramic alumina abrasive micro‑fractures under pressure, continuously exposing fresh cutting edges for the highest material removal rates on demanding applications. The 180mm size fits 7‑inch high‑power angle grinders and is ideal for grinding hard alloys, tool steels, and stainless steel where extended wheel life and fast stock removal are critical.
100mm Aluminum Oxide Grinding Disc
| Diameter | Thickness | Abrasive | Application |
|---|---|---|---|
| 100mm (4″) | 6mm | Aluminum Oxide | Light grinding, deburring, surface finishing, tight‑space work |
The compact 100mm disc is designed for small 4‑inch angle grinders, offering excellent manoeuvrability for light grinding and finishing tasks. Ideal for deburring cut edges, removing light rust, and preparing small metal components in DIY workshops, automotive repair, and confined spaces where larger discs cannot reach.
How to Choose the Right Grinding Disc for Metal?
Selecting the correct metal grinding disc directly affects grinding efficiency, wheel life, and surface quality. The choice comes down to three factors: the metal you are grinding, the machine you are using, and the task you need to perform.
1. Choose by Material – Match the Abrasive to Your Metal
Different metals respond to different abrasives. Using the wrong abrasive leads to slow grinding, excessive heat, and short wheel life.
Carbon Steel & Mild Steel → Aluminum Oxide
Aluminum oxide is the industry standard for carbon steel and structural steel grinding. It is durable, cost-effective, and maintains its cutting edge through repeated impacts. Ideal for general fabrication, weld dressing, and surface preparation on steel plate, beams, and pipes.
Stainless Steel (304/316) → Zirconia Alumina
Zirconia alumina is self-sharpening – it micro-fractures under pressure, continuously exposing fresh cutting edges. This keeps grinding temperatures low, preventing blue/black discolouration on stainless steel. Zirconia also delivers longer life and faster stock removal than aluminium oxide on tough materials. For stainless steel, always use discs with low-iron or iron-free formulations to prevent contamination and future rust.
Heavy Grinding on Hard Alloys → Ceramic Alumina
Ceramic alumina delivers the highest material removal rates and longest life on hard‑to‑grind metals – tool steels, high‑alloy steels, and hardened materials. It micro‑fractures at a finer level than zirconia, maintaining aggressive cutting action throughout its service life. Best suited for high‑power machines and continuous heavy‑duty applications where productivity is critical.
Cast Iron & Non‑Ferrous Metals → Silicon Carbide
Silicon carbide is extremely hard and sharp – ideal for cast iron, aluminium, copper, and stone. It cuts through casting skin and brittle materials efficiently, though it is not suitable for steel grinding.
2. Choose by Machine – Match the Diameter to Your Tool
The grinding disc diameter must match your machine’s guard size. Using the wrong size is unsafe and inefficient.
| Disc Diameter | Machine Size | Best For |
|---|---|---|
| 100–115mm (4–4.5″) | Standard angle grinder | Light grinding, tight spaces, general fabrication |
| 125mm (5″) | Medium angle grinder | Metal fabrication, weld dressing, surface prep |
| 180–230mm (7–9″) | High‑power angle grinder | Heavy weld removal, thick plate grinding, foundry work |
| 300–405mm | Stationary grinding machine | Large‑scale production grinding, heavy stock removal on structural components |
Always check the bore size (arbor) matches your grinder’s spindle – common sizes are 16mm and 22.23mm (7/8″). Never exceed the maximum RPM printed on the disc label.
3. Choose by Application – Match the Disc to Your Task
Weld Removal & Heavy Stock Removal → Thicker Disc (6–8mm) + Coarse Grit (24–36#)
Thicker discs provide the rigidity and durability needed for aggressive material removal. Coarse grit removes metal quickly, making it ideal for levelling welds, grinding down rough surfaces, and heavy beveling. Depressed centre (Type 27) wheels are the standard choice for angle grinder weld removal.
Surface Finishing & Light Grinding → Thinner Disc (4–6mm) + Medium/Fine Grit (46–80#)
Thinner discs offer better control and manoeuvrability for finishing work. Medium grit (46–60#) balances removal rate with surface quality; fine grit (60–80#) delivers smoother finishes. Flat (Type 1) wheels are preferred for bench grinder finishing work.
General Metal Fabrication → Standard Disc (6mm) + Medium Grit (36–46#)
The most versatile combination – covers most workshop grinding tasks from weld blending to surface preparation and edge chamfering.
OEM Metal Grinding Disc Manufacturer
As a specialized metal grinding disc manufacturer, we offer end-to-end OEM and private label services for distributors, tool brands, and industrial buyers worldwide. From custom grain formulations to branded packaging, we deliver grinding discs engineered for performance across all metalworking applications—without the overhead of in-house production.
What We Customise
| Customisation Area | Options |
|---|---|
| Formula | Abrasive type (aluminium oxide / zirconia / ceramic / silicon carbide), bond hardness, grit size, additive package – tailored to your specific metal and grinding conditions |
| Size | Diameter (50–230mm for angle grinders), thickness (3–8mm), bore size (10mm / 16mm / 22.23mm) |
| Shape | T27 (depressed centre) for angle grinder side grinding |
| Colour | Disc body colour matched to your brand identity |
| Label & Packaging | Brand name, logo, product specifications, safety markings (EN12413, max RPM, MPA) – all designed to your brand VI. Inner packaging (shrink‑wrap, colour box, display carton) and outer shipping cartons custom‑printed. |
OEM Workflow – From Concept to Container
Every custom grinding disc project follows a structured process. Here is how we take your requirements from an idea to a finished product on your shelf.
Step 1: Requirement Gathering
You tell us your target market, the metals your customers grind (carbon steel, stainless steel, cast iron, alloy steel), the machines they use (angle grinder size, power rating), your annual volume, and any certification requirements (EN12413, MPA, CE). We assess feasibility and recommend an initial direction – abrasive type, bond hardness, and specification range.
Step 2: Formula Development
Based on your grinding application and performance targets, we develop a custom abrasive formulation. This means selecting the right abrasive grain, adjusting bond hardness for the right grain retention and release rate, and fine‑tuning the additive package for heat control, anti‑loading, or dust reduction. Formula development is what separates a “label‑change” OEM from a true custom manufacturing partnership.
Step 3: Sample Production
Once the formula is locked, we produce samples for your evaluation. Samples come with preliminary test data – dimensional accuracy, hardness, dynamic balance, and cutting performance. We can provide multiple variations (different grits, different thicknesses) so you can compare and choose the best match for your market.
Step 4: Customer Validation
Samples arrive at your facility. You test them on your own equipment – verifying grinding efficiency, service life, surface quality, and safety under your actual working conditions. This is the most critical step. We move to mass production only after you approve performance. Our technical team is available throughout testing for any adjustments.
Step 5: Mass Production
After sample approval, we scale up to full production. Automated batching and pressing lines, climate‑controlled curing ovens (20–30°C, 40–50% humidity), and in‑line inspection systems ensure batch‑to‑batch consistency matches the approved samples. Every batch undergoes dimensional inspection, hardness testing, dynamic balance testing, and sample burst testing (EN12413: burst speed ≥ 1.5× rated max RPM).
Step 6: Quality Inspection & Packaging
Finished discs go through final inspection – visual check, thickness and diameter verification, and 100% RPM testing on every single disc. Once cleared, discs are individually shrink‑wrapped, labelled with your brand design, and packed into custom‑printed cartons. Outer cartons include batch numbers and traceability data for full supply chain visibility.
Step 7: Shipment
Orders are consolidated, palletised, and shipped with a COA (Certificate of Analysis) covering key test data – dimensional accuracy, dynamic balance, burst test results, and cutting performance. Standard lead time: approximately 35 days. Express delivery available in 20 days with packaging materials ready.
Why Dome?
Dome Abrasive is a professional manufacturer of resin bonded grinding discs, cutting wheels, and flap discs. With over 26 years of experience in the abrasives industry, we combine manufacturing scale, technical expertise, and quality control to deliver consistent products for global distributors, tool brands, and industrial suppliers.
Manufacturing Scale
Dome operates a 20,000m² manufacturing facility in Changzhou, China, including a 13,000m² modern production workshop with precise temperature and humidity control. The workshop maintains stable conditions—temperature at 15–25°C and humidity at 40–50%—to ensure the resin bond cures uniformly across every batch. The facility houses 60 fully automated production lines, covering automatic batching, mesh placement, ring insertion, and shrink‑wrap packaging. This automation reduces human error, ensuring consistent disc thickness, hardness, and performance from batch to batch.
Production Capacity
Dome produces approximately 600,000 grinding discs per day, with finished goods ready in 30–40 hours from raw material input. This capacity enables us to handle bulk orders, urgent deliveries, and seasonal demand fluctuations without compromising quality or delivery schedules.
R&D & Engineering
Our 10+ technical and R&D professionals work on abrasive formulation development, bond hardness optimisation, and grinding performance testing. This technical capability allows us to develop custom formulations for specific metals—whether carbon steel, stainless steel, or alloy steel—and adjust disc specifications to match your equipment and working conditions.
Quality Assurance
Every grinding disc undergoes 100% RPM testing before shipment, with batch samples subjected to EN12413 burst testing (burst speed ≥ 1.5× rated maximum RPM). Our products carry EN12413, MPA, CE, ISO9001, and BSCI certifications, with PICC product liability insurance for additional protection. From raw material traceability to finished product inspection, every batch is monitored to ensure consistent performance and safety.
Metal Grinding Disc Manufacturing & Quality Control
Every metal grinding disc that leaves a manufacturing facility carries a responsibility—not just for grinding performance, but for operator safety. At Dome, quality control is not a final step; it is a system that runs from raw material to finished product. Four core tests verify that each disc performs as expected and, more importantly, remains intact at high speed.
RPM Test – Speed Verification for Safety
The RPM test confirms that a grinding disc can withstand its rated maximum operating speed without structural failure. Each disc is spun at its maximum allowable speed—and often beyond—to verify that the resin bond and fibreglass reinforcement hold the abrasive grains securely under centrifugal force. This test is mandatory under EN12413, which requires that abrasive products have a defined safety factor against bursting due to centrifugal forces at their maximum operating speed. Every disc is individually tested before shipment—not batch sampled. If a disc cannot hold together at its rated RPM, it never reaches the customer.
Burst Test – Strength Under Extreme Conditions
The burst test is the most direct measure of a grinding disc’s structural integrity. A sample disc from each batch is mounted on a test machine and accelerated until it breaks. The recorded burst speed must be at least 1.5× the disc’s rated maximum RPM under EN12413. For example, a disc rated at 13,300 RPM must survive past 19,950 RPM before failure. This safety margin ensures that even if the grinder runs slightly above its rated speed, the disc will not shatter. The burst test is destructive—but it is also essential. It is the only way to verify that the bond, abrasive, and reinforcement work together as designed under real centrifugal loads.
Balance Test – Reducing Vibration, Extending Life
An unbalanced grinding disc vibrates. Vibration causes poor surface finish, accelerates operator fatigue, and wears out angle grinder bearings prematurely. The balance test measures mass distribution across the disc. Every disc is placed on a dynamic balancing machine to detect eccentricity. If a disc is out of balance, it is rejected. For discs larger than 125mm, ISO 6103 specifies maximum permissible unbalance values, and ISO 1940-1 requires grinding wheels to achieve at least a G40 balance quality grade for precision applications. A balanced disc runs smoother, cuts more accurately, and reduces operator fatigue. The difference is noticeable from the first pass.
Grinding Performance Test – Efficiency Under Real Conditions
Safety and balance mean nothing if the disc does not grind efficiently. The grinding performance test evaluates material removal rate, wheel wear, and surface finish under controlled conditions. Sample discs are mounted on angle grinders and tested on standard workpieces—carbon steel, stainless steel, or cast iron—depending on the disc’s intended application. The test measures how much material is removed per pass, how quickly the disc wears, and whether the grinding temperature stays within acceptable limits. A disc that removes material efficiently reduces grinding time and lowers consumable cost per workpiece. Performance data from these tests is recorded and traceable to each production batch, ensuring that what we ship matches what we test.
Metal Grinding Disc FAQ
1: What grinding disc is best for steel?
The best grinding disc for steel depends on the steel type and application:
· Carbon steel / Mild steel → Aluminum oxide grinding disc (cost-effective, reliable)
· Structural steel / Heavy fabrication → Zirconia grinding disc (self-sharpening, longer life)
· Hardened steel / Alloy steel → Ceramic grinding disc (coolest cutting, highest performance)
For general fabrication on carbon steel, a zirconia or aluminum oxide grinding disc with 36–46 grit provides the best balance of stock removal and finish quality.
2: What grinding disc should I use for stainless steel?
For stainless steel, always use a grinding disc with INOX low‑iron formulation (Fe + S + Cl ≤ 0.1%) to prevent contamination and preserve corrosion resistance. Recommended abrasives:
· Zirconia – weld grinding, general stainless work (cost‑effective)
· Ceramic – heavy stock removal, high‑volume stainless grinding (best performance)
Use a Type 27 (depressed center) disc for angle grinder applications.
3: What is the difference between Type 27 and Type 1 grinding wheels?
A Type 27 grinding wheel features a depressed center (dish‑shaped) for angle grinder use, allowing grinding at a 15–30° angle on flat surfaces with guard clearance. A Type 1 grinding wheel is flat with no raised center, requiring full flange support—used on bench grinders, pedestal grinders, and stationary machines. Choose Type 27 for handheld angle grinders; choose Type 1 for fixed machines.
4: What grit grinding wheel should I use for metal?
The best grit for metal grinding depends on your application:
· 16–24 grit – Heavy stock removal, weld leveling, rapid descaling
· 30–36 grit – General grinding, weld removal, surface preparation
· 46–60 grit – Medium grinding, weld blending, finishing
· 80–120 grit – Fine finishing, surface refinement, deburring
Start coarse for aggressive material removal, then progress to finer grits for a smooth finish.
5: What size grinding disc do I need for an angle grinder?
The grinding disc size for angle grinder depends on your grinder’s guard and power:
· 100mm / 4″ – Compact grinders, tight spaces, light work
· 115mm / 4.5″ – Standard angle grinders, general fabrication (most common)
· 125mm / 5″ – Larger grinders, extended reach, heavier work
· 180mm / 7″ – Heavy fabrication, industrial use
· 230mm / 9″ – Maximum stock removal, heavy construction
Always verify your grinder’s maximum disc diameter and RPM rating before installation.
6: What is the difference between aluminum oxide and zirconia grinding discs?
Aluminum oxide vs zirconia grinding disc comparison:
· Aluminum oxide – controlled blocky fracture, cost‑effective for carbon steel, mild steel, general fabrication
· Zirconia – heat‑activated micro‑fracture, self‑sharpening under pressure, longer life on stainless steel and high‑strength alloys
Zirconia typically outlasts aluminum oxide by 2–3 times on stainless and hard metals. Aluminum oxide is the economical choice for carbon steel. Choose zirconia for stainless and alloys; choose aluminum oxide for carbon steel and general fabrication.
7: What grinding disc is best for weld removal?
The best grinding disc for weld removal depends on the material:
· Carbon steel welds → Zirconia or aluminum oxide, 24–36 grit, Type 27 or T29 profile
· Stainless steel welds → Ceramic or zirconia with INOX bond, 24–36 grit, T29 conical profile for edge work
· Heavy weld removal → 24 grit for aggressive stock removal, then 36 grit for blending
· Precision weld blending → 36–46 grit for smooth finish
A T29 profile (conical) is ideal for aggressive edge work and contoured weld seams. A T27 profile (flat) is better for flat surface blending.
8: What thickness grinding disc should I choose?
Thickness depends on your application. Thinner discs (4–6mm) offer better control and manoeuvrability for finishing work, light grinding, and tight spaces. Thicker discs (6–8mm) provide greater durability, longer life, and withstand heavier grinding pressure—ideal for weld removal, heavy stock removal, and foundry work. For general fabrication on carbon steel and structural steel, a 6mm disc offers the best balance of control and durability. For stainless steel and heavy applications, 6–8mm discs are recommended for extended service life.
9: Can I use a 230mm grinding disc on a 4.5‑inch angle grinder?
No—absolutely not. The disc diameter must match the grinder’s guard size. A 230mm (9″) disc is too large for a 4.5″ grinder and will not fit the guard properly. Using an oversized disc is extremely dangerous: the disc is not rated for the grinder’s speed, the guard provides no protection, and the disc will shatter at high RPM. Always match the disc diameter to your machine’s specified size.
10: What does “grit size” mean on a grinding disc?
Grit size indicates the coarseness of the abrasive particles. Lower numbers = coarser grit: 16#–24# for rapid material removal, heavy grinding, and weld removal. Medium grit (36#–46#) is the most versatile range for general fabrication, surface preparation, and edge chamfering. Higher numbers = finer grit (60#–80#) for finishing, smooth surfaces, and light deburring. Choose grit size based on your material removal needs and desired surface finish—coarse for speed, fine for finish.
11: Why does my grinding disc vibrate during use?
Vibration is typically caused by mass eccentricity—the disc is out of balance. This can result from uneven wear, improper mounting, a manufacturing defect, or a damaged disc. Stop immediately—a vibrating disc indicates an unsafe condition. Check that the disc is properly mounted with clean, tight flanges and that the disc is not damaged. If vibration persists, replace the disc. Out‑of‑balance discs reduce surface quality, accelerate operator fatigue, and wear out angle grinder bearings prematurely.
12: Can you manufacture private label grinding discs?
Yes—Dome offers full OEM and private label manufacturing for distributors, tool brands, and industrial suppliers. Customisation options include: formula (abrasive type, bond hardness, grit size), size (diameter, thickness, bore size), colour (disc body colour matched to your brand identity), label (brand name, logo, specifications, safety markings), and packaging (shrink‑wrap, colour box, display carton, outer carton). We also provide certification support—EN12413, MPA, CE, and other compliance documents bearing your brand name. Free samples are available for testing before bulk orders.
13: What is your minimum order quantity (MOQ) for OEM grinding discs?
MOQ varies based on customisation scope. For standard sizes with packaging customisation, MOQ is typically from 5,000 discs upward. Custom formulas, non‑standard sizes, or special colours have higher MOQs. We work with both emerging brands and established distributors—trial orders may be considered for certain items. Contact us with your annual volume for a specific quote. Free samples are available for testing before you commit to a bulk order.
14: What is the typical lead time for OEM grinding disc orders?
Standard lead time is approximately 35 days from order confirmation to shipment. With packaging materials ready, delivery can be as fast as 20 days. Rush orders can be expedited for an additional fee—contact us with your timeline for a specific schedule. Our 60 fully automated production lines and 600,000 discs daily capacity enable us to handle bulk orders, urgent deliveries, and seasonal demand fluctuations without compromising quality or delivery schedules.
15: What is EN12413 and why does it matter?
EN12413 is the mandatory European safety standard for bonded abrasive products (grinding and cutting discs). It requires that a disc’s actual burst speed must be at least 1.5× its rated maximum RPM. This safety margin ensures that even if the grinder runs slightly above its rated speed, the disc will not shatter. EN12413 also covers marking requirements, dimensional tolerances, and maximum operating speed limits. For buyers, EN12413 certification is the hard compliance requirement for accessing European markets and the first line of protection for operators on site.
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