The 10 Best 3M 45 Flat Discs

The 3M Fibre Disc 381C is a versatile and general purpose metalworking disc, designed to help with a variety of applications from grinding, weld removal & finishing to blending on common metals like carbon steel.

Product Description

3M SandBlaster 9681 4-1/2-Inch Coarse Clean-N-Strip Disc

From the Manufacturer

Angle grinders have long been used by woodworkers and metalworkers for grinding, cutting and polishing. These tools, which operate at extremely high speeds (10,000 RPM and higher), are some of the most aggressive power tools on the market. In the past, they were rarely used for sanding, because the abrasives performed poorly and changing them required wrenches, which interrupted workflow. In an effort to expand the usage of these powerful tools, 3M has invented an entire new line of abrasives and a unique new method for changing discs. With these innovations, angle grinders can be used for the first time as versatile, highly effective sanding systems. 3M’s exclusive quick loading adapter is the hub of this new system. The adapter allows users to switch quickly and easily between a variety of abrasive discs-without using a wrench. Now a 4-Inch or 4-1/2-Inch angle grinder can become a versatile sanding tool capable of handling a wide range of sanding tasks. 3M SandBlaster 4.5-Inch clean-n-strip disc can be used on many surfaces and are great for removing and cleaning rust, paint and many other coatings.

3M Cubitron II Flap Disc 967A is ideal for medium-pressure applications on flat and contoured surfaces, especially in light deburring or weld leveling to prep for paint in mild steel. It’s also great for stainless steel fabrication where finish and gouge resistance are important. Powered by 3M Precision-Shaped Grain, this disc cuts fast and lasts long.

Product Description

3M Flap Disc 577F tackles the toughest high-pressure metalworking applications and leaves a blended finish, all in a single step. The abrasive flap disc features fast-cutting alumina zirconia mineral on durable polyester-backed flaps for extra cutting power, and long life on heavy duty applications such as weld removal, sharp-edge work, and beveling.

From the Manufacturer

The 3M&#8482 Flap Disc 577F Type 27 giant quick change disc tackles your toughest high-pressure metalworking applications and leaves a blended finish, all in a single step. The 577F abrasive flap disc features fast-cutting alumina zirconia mineral on durable polyester-backed flaps for extra cutting power, and long life on heavy duty applications such as weld removal, sharp-edge work, and beveling. A grinding aid reduces grinding temperatures for processes involving heat-sensitive alloys such as stainless steel, nickel alloys, and titanium.

Ideal for tough grinding applications where final finish is important, the overlapping layers of the flaps continually wear away with use to expose fresh mineral for a fast, consistent cut, while the cushioning of the flaps creates a blended finish. Flap discs typically generate a finish one grade finer than the disc is graded, reducing finishing steps. Type 27 is designed for high pressure applications on flat surfaces or outside edges and produces a smooth finish.

Each quick change disc comes packaged with a disposable attachment hub and has a 5/8 inch threaded center hole for attachment to a right angle grinder. Giant 4-1/2 inch flap discs have a max RPM of 13,300, and the 7 inch discs have a max RPM of 8,600.

Flap discs are three-dimensional grinding discs with overlapping layers of abrasive-coated, fiber-reinforced flaps that fan out from a central hub. These flaps continually wear away with use to expose fresh mineral for a fast, consistent cut. The one-step alternative to bonded wheels and fiber discs, flap discs grind and finish in a single step, making them a time and cost-saving solution in many typical applications. Under normal conditions, flap discs will generate a finish that is one grade finer than the finish of a fibre disc of the same grade. And, because their overlapping construction allows more abrasive material to be loaded onto the cutting surface, they far outlast typical discs. Flap discs have the flexibility to easily follow curves and contours while delivering less gouging and enhancing operator comfort. They are ideal for a wide range of applications, including weld grinding, deburring, rust removal, edge grinding, and weld seam blending.

For more than a century, 3M has applied innovation and technology to improving our customers’ lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. Abrasive Systems products, including a complete line of coated abrasives, microfinishing and microreplicated abrasives, and hardware accessories, provide the finishing touch for almost any surface conditioning application. The 3M brand, across thousands of products, represents consistency, superior quality, and value.

Product Description

3M Cubitron II Fibre Disc 987C offers significant gains in productivity on medium to heavy-duty operations thanks to the exceptionally high-performing 3M Precision-Shaped Grain combined with a stiff fiber backing. This disc achieves a higher cut-rate, greater durability, and longer life than other fiber discs — all with less grinding pressure.

From the Manufacturer

3M Cubitron II Fibre Disc 987C is suitable for use on almost all metals and excels in stainless steel and other nickel alloy applications. It is ideal for weld removal, beveling, removing mill scale, pits and imperfections, and more. Because 3M Precision Shaped Grain generates an exceptionally high cut-rate with less pressure, operators can finish tough tasks faster and with less fatigue. A grinding aid incorporated on the disc makes this an outstanding product for all types of metal—it helps keep the disc cooler on stainless steel and heat-sensitive metals such as nickel alloys and titanium, thereby reducing metal discoloration/oxidation and the chance of heat-related stress cracks. Moreover, because the abrasive itself stays cooler and sharper, 3M Precision Shaped Grain discs last significantly longer than conventional ceramic grain discs, delivering a lower cost per grind with fewer disc changes.

3M Cubitron II products have raised the bar for high-performing abrasives. 3M Precision Shaped Grain outcuts and outlasts conventional ceramic industrial abrasives and requires less grinding force to achieve superior performance. The result is that operators can grind faster and complete more parts per disc with less muscle-work and fatigue.

To create 3M Precision Shaped Grain, engineers started with 3M Ceramic Abrasive Grain and used proprietary technology to form the grains into triangular structures and electrostatically orient them on the backing to form sharp peaks that maximize cutting potential. These peaks slice cleanly through metal, rather than gouging or plowing as traditional abrasives do, and continuously self-sharpen as the points break off. This generates a super-fast cut and lessens heat build-up due to friction, reducing heat-related stress cracks and discoloration.

3M Precision Shaped Grain also wears evenly, and because the abrasive itself stays cooler and sharper, 3M Cubitron II products last significantly longer than their conventional ceramic counterparts, ensuring extended high performance in production applications.

Fiber discs are heavy-duty discs ideal for weld removal, grinding, and blending large and small areas of metal surfaces. They feature a tough, stiff backing made from vulcanized fiber that resist wear and can handle tough grinding applications.

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Conclusion

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