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SKU 7000082272
Legacy SKU 60980021442
UPC 00051144843657
Product Number 6220J

3M Flexible Diamond Whetstone 6220J features micron-graded flexible diamond abrasive bonded to a lightweight, hand-held block for sharpening cutting tools and faceting stones.

  • Use for precision faceting and sharpening of chisels, blades, knives and carbide tools
  • Metal bond withstands heat during grinding
  • Aluminum holding block is lightweight for easy grip and less operator fatigue
  • Diamond mineral cuts aggressively to reveal tool's sharp cutting edges
  • Open dot pattern reduces loading
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On it's way to you May 28   


Minimum Order 5 Items
Order Increment 5 Items
  Superior Cutting
  Multi-Purpose Tool
  Fast Shipping
  Lowest Price Per Item
Product Dimensions
Imperial Metric
Weight 0 NULL
Width 0 null
Length 0 null
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Thickness 1.969 in 50 mm
Shipping Dimensions
Weight 3.30032 lb
Length 10.51181 in
Width 3.26772 in
Height 2.99213 in
Color Black


  1. What is the 3M™ Flexible Diamond Whetstone?

    The 3M™ Flexible Diamond Whetstone is a durable sharpening tool designed for fast and consistent honing of knives, tools, and other edges.

  2. How big is the whetstone surface area?

    The diamond whetstone has a surface area of 6 inches x 2 inches, which makes it easy to use on larger blades or multiple small blades simultaneously.

  3. What does "6250J, M125 Mic" mean in the product name?

    "6250J" refers to the product model number while "M125 Mic" describes its medium grit size. It's best suited for repairing and refining dull edges and removing scratches.

  4. How many pieces come in each case of this product?

    Each case contains five (5) pieces of our high-quality flexible diamond whetstones that are made to last. This allows you to have one handy whenever you need it or share with others who might benefit from using them.

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.
Keep It Looking Sharp

Cutting tools are designed to do what their name implies – cut sharp and slice through the workpiece surface. However, even cutting tools get dull and wear after repeat use. That's why 3M designed the 3M™ Flexible Diamond Whetstone 6220J. This abrasive accessory uses micron-graded diamond mineral to abrade the surface of the cutting tool and restore its acute cutting capabilities.

Diamond mineral is one of the toughest, most durable natural minerals. Its sharp cutting abilities render it a good match for cutting tools, as it can slice cleanly through dulled surfaces to reveal the sharp edge underneath. Given diamond mineral's inherent aggressiveness, this accessory is commonly used for precision faceting and sharpening of chisels, blades, knives and carbide tools. The diamond mineral is adhered to the aluminum block with a metal bond. Metal bonds are some of the toughest bonds and help it stay strong during grinding.

Diamond mineral on 3M™ Flexible Diamond Whetstone 6220J is fastened to the block in an open dot pattern. The open dot pattern allows swarf to escape, so debris will not clog the mineral. This helps sustain a sharp cut and prolong abrasive service life. 6220J also comes in a variety of grades to accommodate varying degrees of stock removal. Choose from 125, 74 and 40 grades. Grades like 40 micron tend to finish finer. Grades like 125 micron tend to cut more aggressively. Each block is color coded by grade to help reduce the risk for error during a multi-step sequence.

With up to five blocks per case, operators may also reduce the need for reorders. This small but mighty accessory comes in handy when your cutting tools start to dull. Sharp-cutting diamond mineral tackles dull surfaces, and the lightweight hand-held design makes it easy to access contours and edges on the cutting tool. Keep this accessory at your disposal, so you won't have a reason to dispose of your valuable cutting tools.

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