METAL GRINDING TOOLING: GRIT&BOND
There are different kinds of diamond tool segment designs in the market. No matter which design you prefer, knowing two metal grinding tooling basics will maximize your grinding output and help to ensure the success of your projects.
Number one is choosing the correct grit number. Lower grit number leaves more coarse scratches and higher grit number finer scratching pattern, and the rule of thumb is that each consecutive grit to be approximately doubled, so it can remove the scratches of the previous step. For example, if you start with 30 grit, the next grit is 50 or 70, then 100 or 120, 200 or 220, 400, 800, etc. Skipping a grit step will put you up against some serious scratched floor challenges.
Number two is matching tool matrix/bond with the floor hardness as accurately as possible. The rules for choosing the correct bond are: Soft concrete requires hard bond diamonds and hard concrete needs soft bond diamonds. In details they are:
- Hard Bond (Soft Concrete Under 2000psi; Mohs Scale 2-3),
- Medium Bond ( Medium Concrete 2500~4000psi; Mohs Scale 3-5),
- Soft Bond (Hard Concrete 4000~5500psi; Mohs Scale 5-7),
- Extra Soft Bond (Extra Hard Concrete 5500~7000psi; Mohs Scale 7-8),
- Super Soft Bond ( Super Hard Concrete Over 7000psi; Mohs Scale 8-9).
