Metal bond diamonds are generally more aggressive than resin bond diamonds of the same grit. Take a 60-grit metal bond diamond and rub it a few times on a piece of marble. Next take a 60-grit resin bond diamond and rub it on the same stone in a different location. You will notice that the metal bond diamond will leave deeper more aggressive scratch patterns than the resin bond diamond, even though they are the same grit size. The reason for this is because the diamond grit is attached to a metal backing of some sort and forces the abrasive to cut more deeply. The resin bond diamond is suspended in a plastic resin and it is more difficult to force the diamond to cut. The lesson here is simple: If you want to cut or hone aggressively, use a metal bond diamond. If you want a finer cut, use a resin bond diamond.
Summary: Silicon Carbide Vs. Diamond
Silicon carbide
- Works better on soft stone
- Less expensive
- Cuts slowly
- Does not require the use of water
- Creates more dust (when used dry)
- Can be used in cold environments (when used dry)
Diamond
- Works better on hard stone
- More expensive
- Cuts fast
- Usually requires the use of water
- Less dust (when used with water)
- Cannot use easily in cold environments (when used wet)
About the author:
Frederick M. Hueston runs the National Training Center for Stone & Masonry Trades, Asheville, NC 28806; www.ntc-stone.com; and can be reached at Fhueston@aol.com.




