Product Overview
Built Tough, Finishes Fine
3M™ Flexible Diamond Belt 6420J is an abrasive belt designed to achieve fine finishes on a wide range of hard-to-grind materials. It features diamond abrasive mineral in an open dot pattern for aggressive cutting action with minimal loading. This is held in place with a metal bond, which tend to be the most tough for use on hard surfaces.
Recommended Applications
This belt is ideal for roll grinding and other wet grinding and finishing applications where the abrasive is supported by a contact wheel or platen pad. This is especially true for use on hard substrates such as chilled iron, forged steel, thermal sprays or ceramics. It is also suitable for slack of belt operations, such as glass seaming and hot roll finishing.
Three Distinct Patterns
3M™ Flexible Diamond Belt 6420J comes in three patterns: 18, B2 and 21. Here's how to distinguish between the three: 18 is a small-dot pattern, which will help achieve finer finishes. It provides aggressive stock removal on very hard materials such as thermal spray coatings and ceramics. B2 is a medium-dot pattern designed for aggressive cutting action and has improved coolant flow. 21 is the largest dot pattern and it's ideal for applications where loading is a problem; gaps allow swarf and debris to escape.
Overall, the open dot pattern – whether spaced out or condensed – helps produce aggressive cutting action while reducing loading. Given its dual strength and flexibility, 3M™ Flexible Diamond Belt 6420J is a great abrasive for your hard metal grinding and finishing needs.