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SKU 7010331211
Legacy SKU 66000103318
UPC 00051115427312
Part Number 640606

The Standard Abrasives™ Aluminum Oxide Flap Wheel works well on inside and outside diameters of metal workpieces for high stock removal and aggressive blending, finishing and cleaning, and leaves a straight line finish. Choose from a wide range of diameters with different attachment styles to achieve consistent coverage on many different contours and shapes.

  • Flaps provide coverage on contoured or radiused surfaces
  • Coated abrasive flaps provide aggressive stock removal, blending, finishing and cleaning
  • Produces a straight line finish
  • Steel mandrel reduces chatter and operator fatigue
  • Aluminum oxide cuts quickly and suits ferrous and non-ferrous materials
  • Available in a broad range of sizes and grades to suit almost any part
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On it's way to you March 22  


Minimum Order 10 Items
Order Increment 10 Items
  Immense Durability
  Easy To Use
  Global Shipping
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Width 2 in 50.8 mm
Diameter 4 in 101.6 mm
Shipping Dimensions
Weight 7.221 lb
Length 8.625 in
Width 8.625 in
Height 7.25 in
Maximum RPM 12,000
Grit 80


  1. Are these flap wheels suitable for my metal finishing applications?

    Absolutely! The 3M's Standard Abrasives™ A/O Flap Wheel 640606 is ideal for deburring, blending and cleaning on flat or contoured surfaces.

  2. Is it available in different sizes and grit options?

    Yes! Our Flap Wheels are available in a wide range of sizes from 1 inch to 6 inches with varying grits ranging from coarse to fine.

  3. How long does it typically last before I need to replace the wheel?

    It depends on your usage. Our Flap Wheels have a long life due to its durable aluminum oxide mineral construction that provides fast cut rate and consistent finishes.

  4. Can I use this flap wheel with my existing tool?

    Of course! This A/O Flap Wheel is built with versatile designs that work well with power tools including bench grinders, disc sanders, right angle grinders among others.

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Flaps Offer Aggressive Cut on Radiused and Contoured Parts

A flap wheel is a useful tool for cleaning up burrs and parting lines on radiused or specially shaped parts where coated discs are not conformable enough or do not have the necessary reach. 3M offers the Standard Abrasives™ Aluminum Oxide Flap Wheel in smaller diameters for attachment to hand-held tools, and larger diameters for off-hand applications. A broad selection of grades is available to deburr edges, remove flash and parting lines, blend machine marks, apply a linear scratch pattern, or provide light blending, cleaning, or polishing.

Compared with non-woven products, flap wheels offer a more aggressive cut for cleaning or finishing. If a silicon carbide product is preferred for finishing applications, consider our Standard Abrasives™ Silicon Carbide Flap Wheel, available in 1-3˝ diameters (sold separately). When a job requires even more flexibility for improved finishing, or to reduce dust, use a Standard Abrasives™ Flexible Flap Wheel (sold separately), which has flaps with increased flexibility and a slight radius to the flaps.

Some tools may require an additional reducer bushing or adapter for wheel attachment.

Small Wheels Access Inner Radiuses and Maintain Maximum Control

The flap wheels with smaller diameters provide access to smaller and harder-to-access inner radiuses or contours on irregular parts. These flap wheels are especially useful for cleaning or deburring the insides of tubing. For these smaller areas, flap wheels provide a softer touch than rolls or bands, which are suitable when more aggressive material removal is required.

The smaller wheels are 1-3˝ in diameter have a 1/4˝ steel mandrel or a 1/4˝-20 threaded steel shank to enable fast yet secure product change outs. In each case, the steel attachment runs the full width of the wheel center, reducing chatter in the rotation. As a result, a smoother finish can be achieved, and the operator maintains greater control of the tool with less pressure, increasing productivity.

Large Wheels Supply Broader Coverage

For larger hand tools or off-hand applications, 3M provides flap wheels in diameters from 3-1/2˝ to 8˝ with 1˝ or 2˝ widths. These sizes have a 5/8˝ or 1˝ center hole compatible with larger tool arbors. The larger wheels contain more flaps per wheel for faster cutting, increased productivity, and longer life.

Durable Wheel, Fast Cut

Aluminum oxide is a popular choice among industrial professionals because of its versatility on different surfaces, fast cut-rate, and long life. It is a tough, durable abrasive that self-fractures to expose fresh cutting edges in use, whereas traditional abrasives such as garnet quickly wear down with use. Aluminum oxide mineral is suitable for a wide variety of materials, including ferrous and non-ferrous metals.

Quality Standard Abrasives™ Products for Industrial Applications

The Standard Abrasives brand has supplied quality abrasives to the metalworking industry for over 50 years. Customers rely on 3M's broad offering of high-performance products, including coated, bonded, and non-woven abrasive lines.

Brochures, Catalogs & Data Sheets