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3M™ CBN Resin Wheel 143BI, 1A1, 12x1x5, X=1/4 B220 143BI-MMMRBBW21438

3M™ CBN Resin Wheel 143BI, 1A1, 12x1x5, X=1/4 B220 143BI-MMMRBBW21438

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#7100185461
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For industrial/occupational use only. Not for consumer sale or use.

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.


Our 3M™ CBN Wheel 143BI wheels are used for grinding primary and secondary relief angles on cutting tools made of tool steel and high speed steel. This general purpose wheel offers a balance between cut rate and good form retention during grinding operations.
More Information
Specification(s)
Brand3M
Product FormWheel
Product Number143BI
Wheel Type1A1
Country Of OriginUS
Shipping Quantity1.0
UPC Code0000000000000

The 3M™ CBN Wheel 143BI was designed for high performance primary and secondary relief grinding. This process is used in the production and sharpening of cutting tools. Cutting edges are typically "relieved" to enhance chip clearance. Primary relief involves removing material directly behind the cutting edge. For secondary relief, a slight bevel is ground next to the primary relief.

3M provides a broad portfolio of superabrasive wheels used for your round tool relief and clearance angle applications. From short runs and re-sharpening to "lights-out" and long production runs, 3M has the wheel design to meet your needs.


  • Cubic boron nitride abrasive mineral provides fast cut rates at high temperatures
  • The resin bond system balances cut rate with good form retention
  • Designed for water based coolants
  • Arbor holes are made to customer specifications, so you get exactly the size you need
  • Best used for grinding high speed steel, tool steels, and ferrous metals