3M™ Flexible Diamond Roll 6456J, 8in x 8ft x 3in, M74 Micron, Type FB, Pattern 18, 4-ft Leader both ends, 4 ea/Case

Designed for Centerless Grinding and Superfinishing

Combining the strength of a diamond mineral and a durable, water-resistant cloth backing, 3M™ Flexible Diamond 6456J is built for processes requiring precision and excellent dimensional tolerance, such as centerless grinding and superfinishing. It features a very close to zero caliper splice, for centerless finishing where uniform belt thickness is essential, to avoid splice bumping.

This diamond abrasive excels at finishing on hard-to-grind surfaces including stone, glass, ceramic, metal, carbides and composites.

Built Tough, Finishes Fine

3M adheres the diamond abrasive on 3M™ Flexible Diamond 6456J using a metal bond. Compared to resin or vitrified bonds, metal bonds tend to be the most tough. These characteristics are combined with a low stretch water-resistant cloth backing to create a product well-suited for both centerless grinding and superfinishing.

Open Dot Pattern: What Does it Mean?

The open dot pattern on each 3M™ Flexible Diamond abrasive is designed to provide aggressive cutting action while also allowing consistent space for evacuation of stock particles during use. This helps reduce loading and prolongs the life of the abrasive surface without sacrificing cut rates.

3M™ Flexible Diamond 6456J is available in three open dot patterns for a range of uses. Pattern 18 is a small dot pattern equating to 25 pellets per inch. The B2 Pattern has medium dots with 17 pellets per inch, and is designed to deliver an aggressive cutting action with improved coolant flow and increased swarf removal. Pattern 21 is offered for grades 250µ and 300µ only. It utilizes larger dots to assist in applications where high stock removal is required and loading is an issue. Generally, the smaller dot patterns will be the least aggressive and produce finer finishes, whereas the larger dot patterns will be more aggressive for stock removal.

Recommended Applications

Designed for precision grinding applications requiring precise caliper control

Superfinishing

Better Science for Better Sanding from 3M

Part of the 3M portfolio of Superabrasives, the 3M™ Flexible Diamond Roll 6456J is an outstanding example of how 3M applies science to the lives of professionals in a range of specific industries where excellent grinding and finishing are critical. From its hard diamond mineral abrasive to its durable cloth backing, it is built by 3M to help businesses like yours operate faster, better and more efficiently.

• Designed to finish hard-to-grind materials
• Provides aggressive cut with reduced loading
• Water-resistant backing
• Low stretch backing supports centerless grinding (in belt form)
• Minimal caliper splice reduces splice thickness to reduce “splice bumping” during grinding
• Multiple dot pattern designs help deliver a range of capabilities
• Metal bond and durable YF weight backing provide strength and longevity
• Custom sizing suits unique project needs