In the field of metal manufacturing where steel cutting is required, DIY users who are engaged in DIY operations always have initial questions about what is the best abrasive product that can effectively cut stainless steel and low carbon steel. There are several key factors in choosing the right power tool for your project and the most effective steel abrasive cutting disc for your project . For DIY operators , these factors largely depend on the type of the material which needs to be cut, the thickness of the metal which needs to be cut, and the accessibility of the metal area that needs to be cut. Our goal is to use the best abrasive for the following tasks.

Best Power Tools to Cut Steel

Steel can be cut with almost power equipment, depending on the shape of the steel that needs to be cut. A bench mounted, the drop saw will fit a 14” 350mm or 16” 400mm cutting blade, and this is the most suitable for heavier steel work as the chop saw can cut through almost any metal with the correct cutting disc.

The desktop drip saw is especially suitable for cutting steel with repeated lengths quickly and accurately. The limitation of this tool is that it can only cut at a right angle of 90º. For lightweight automatic operations, rotary or pneumatic tools may be your weapon of choice. These tools are particularly useful and can help you enter hard-to-reach areas where you can’t manipulate heavy, bulky tools. You can also use a hacksaw to cut metal, but for work that can be done in a short time with a power tool, this is a heavy task.

However, due to its size, affordability and portability, the most popular and versatile power tool for cutting steel is an angle grinder. Angle grinders of various sizes can be purchased to suit different sizes of abrasive cutting discs. Each angle grinder will run at a different RPM to fit the corresponding grinding disc, so it is important not to install the wrong size disc on the angle grinder. They will also have a protective cover, do not remove the protective cover to accommodate grinding wheels that do not fit the size of the grinder.

An angle grinder includes a spindle washer and spindle nut that you’ll install in different configurations to accommodate thicker or thinner wheels or remove altogether when screwing wire wheels and cups onto the threaded spindle.  The most popular angle grinder sizes in China for both professional fabricators and DIY users are 4″ 100mm , 5″ 125mm and any other popular size .

Choosing Profile of Cutting Disc

There are two types of common cutting wheels to suit an angle grinder: Type 1, which is flat; and Type 27, which has a depressed centre.

Generally speaking, Type 1 wheels offer more versatility, especially when cutting profiles, corners or any other metals that requires the operator to cut up and over two different planes of cutting surface. Type 27 wheels, on the other hand, are ideal for getting into tight corners or overhangs. The depressed centre of a Type 27 wheel provides the extra clearance sometimes needed to get the job done. It is strongly recommend that the general DIY users purchases a flat Type 1 cutting disc which is the more popular type wheels.

Choosing The Right Grinding Wheels for Your Project

Choosing the grinding wheel or cutting disc you need depends on the materials you’ll be working with: metal, stone, concrete, etc.

GRINDING

Grinding wheels made of aluminum oxide are the most commonly used for working with metals. There are also abrasives made of zirconia , a combination of aluminum oxide and zirconium-oxide.

Zirconia-oxide is a heavy-duty substance that doesn’t splinter, so you don’t have to change the wheels as often. This abrasive may cost more than others, but it will last longer.

Aluminum oxide grinding discs can be used on ferrous metals, iron, steel, and nonferrous metals. Zirconia oxide will work on steel, iron, and bronze.

CNDOME Abrasive Company offers aluminum oxide composite. It is said to grind cooler than the standard grinding wheel and fractures into smaller pieces, where they sell a wide selection of grinding discs and cutting wheels.

When grinding stainless steel, the grinding wheel must be free of contamination. Before grinding operation, any contaminants will rust, so you must start with new contaminants or just use a grinding wheel to grind stainless steel. Martin warns against mixing wheels when using stainless steel.

Wheels with a resin bond are especially suited for grinding stainless steel. Abrasive disc of CNDOME contains less than 0.1% of iron, sulfur, or chlorine elements in the abrasive material.

When using non-ferrous metals, it is best to use silicon carbide abrasives. These wheels have load-bearing properties and prevent aluminum (softer metal) from sticking.

The diamond cup wheel is most suitable for professional masonry work. Silicon carbide grinding wheels can be used as a cheap alternative, although they may not be efficient.

The most common sizes of grinding wheels are 4 1/2 inches to 7 inches, but other sizes of CNDOME are 4 inches, 6 inches, 9 inches and 5 inches. Grinding wheels are usually sold without hubs. If the washers and nuts that came with the grinder are missing, you need to purchase replacement parts or buy a grinding wheel with a hub.

CUTTING

The thin CNDOME grinding disc is a popular cutting disc specially used for grinding wheel and cutting disc. This type of blade can cut quickly and actively, and has Type 1 (flat) and Type 27 (recessed) forms. When nuts are needed, use Type 27 for flush cuts.

The new trimable option allows you to grind the disc back to the plastic to open a new paper sleeve.

The industry is moving in the direction of three-in-one grinding wheels, which integrate cutting, grinding and polishing.

The flap disc is used for grinding and is 4½ inches to 7 inches in size. The higher the power amplifier of the grinder, the thicker the wheel selection.

The ceramic flap has a longer service life and is more aggressive. There are new trim options that allow you to grind the disc back to the plastic to open a new paper sleeve.

To remove paint and rust, use a porous wheel. For other uses, please choose a reel (flat, knotted, cup-shaped or crimped).

The grinding wheel is not only marked by the type of abrasive, but also by the size of the grit and the grade of grinding.

The particle size ranges from 30 to over 100: the smaller the number, the larger the particle size. For surface treatment, you will need to choose between ultra-fine and medium-fine sand. Choose ultra-fine gravel to complete the welding project.

The slope of the wheel is marked by the letters A. Your hardest grade is the end of the letter.

Remember that there are no standards set among grinding wheel manufacturers. Each uses its own identification method.

The staff at CNDOME will be happy to help you determine which wheel is best for your project.

Choosing Grain and Quality in Cutting Wheels

The most popular grain used to make abrasive cutting disc is alumina oxide. This is a softer adhesive that can control cutting quickly, smoothly and easily. It is possible to buy these alumina cutting discs with INOX grade quality, which means that the grinding wheel does not contain iron and therefore has the ability to cut stainless steel and mild steel. If the cutting disc is not designated for stainless steel or INOX is printed on the label, it may only be suitable for mild steel cutting. Since stainless steel is one of the most difficult steels to cut, the disc used for cutting stainless steel can cut all types of metals, including aluminum, sheet metal, steel bars and other low carbon steels.

Choosing Thickness of Cutting Wheels

The cutting disc has different thicknesses, and the type of grinding wheel you choose depends on the type, shape and thickness of the steel to be cut. For daily work performed on stainless steel or mild steel with an angle grinder, please select a thickness of 1mm or 1.6mm of the disc.

For items involving thin metal (such as sheet metal), please choose a thin cut sheet of 1.0mm or 0.8mm. These thinner discs can process metal plates faster, so once they are finished, they can reduce discoloration and reduce the cleaning of metal surfaces.

When working with Aluminium, best results it is recommended to apply cutting disc or other type of saw lubricant to the cutting disc to preserve the life of the blade and avoid chipping. For heavier steel cutting jobs where you need to cut through a significant thickness of metal, select a 1.6mm or 2.5mm thickness of cutting disc. However, it is important to note that thicker wheels cut slower and generate more friction and heat through the cut — often discolouring the workpiece and requiring additional steps to finish.

Tips on Using Cutting Wheels on an Angle Grinder

The first rule when using an angle grinder is safety. This means: Use the grinding wheel suitable for the size of the grinder, the appropriate safety gear (safety gloves, mask, safety glasses, etc.), let the grinding wheel work-do not push the grinding wheel, and pay attention to your own work. It is important to use uniform pressure and consistent movement during the cutting process. Let the grinding wheel complete the work and use the weight of the tool to complete the cut. Excessive force will increase the cutting speed, but it will also generate heat and friction, which will eventually shorten the life of the grinding wheel, which is very dangerous.

Choosing the Right Cut-Off Wheel

There are many factors involved in choosing the right abrasive disc for any cutting job. The desired end result is usually the most important, whether it involves high-speed production cutting or precision, fine finishing cutting applications. Know the following information to help the selection process.

  • First , the type of material to be cut: hardness, size and shape, the quality of the cut.
  • Second , the typeof machineto be used: short stroke, swing or swing frame, brand and model, size, horsepower, spindle speed, workpiece fixing method, wet or dry cutting.
  • Third , the dimensional characteristics of the wheels currently in use: diameter, thickness, spindle and rebar style, manufacturer’s specifications (name, grade, rpm).

Use soft grades in the following situations:

  • The machine power is low.
  • A good finish is important-usually used to provide fine grains with minimal burrs.
  • The operator cuts slowly.

Use the middle level in the following situations:

  • Softer grades cannot provide sufficient cutting force-longer wheel life is required.
  • Cut common materials. The machine power will support faster cutting speeds.

Use hard grades in the following situations:

  • Seek maximum wheel life.
  • The machine has sufficient horsepower (1 hp per inch of wheel diameter is recommended).
  • The burr and finish requirements are extremely minimal. (Please note that fast cutting will produce a fairly good finish)

Abrasives Suppliers

Good abrasive suppliers will stock a range of cutting discs for mild steel and stainless steel to fit bench-mounted drop saws, angle grinders and pneumatic tools. At CNDOME, a Chinese company, we stock cutting abrasives to fit all different sizes of drip saws/chopper saws, pneumatic tools, rotary tools, rotary tools and angle grinders. We sell high-quality cutting discs for the metal manufacturing market.

CNDOME is one of top 10 abrasive manufacturer from China.Along with a wide and ever increasing range of high quality industrial consumables that represent amazing value for money for our customers, CNDOME  supply cut off  wheels to suit all steel, in a range of thicknesses to suit your preferred application. View our entire cutting disc range here.