What Makes Grinding Tools Work Faster and Longer

Diamond grinding is a mature technology, and there are effective ways a manufacturer can alter the performance of their grinding wheels. Diamond grit size and bond choices are the primary factors that determine a wheel's performance.

• Diamond grits are the grinding agents. Naturally the bigger and higher-grade they are, the more aggressively the wheel will grind.
  • The common grit size for concrete wheel is #30/40.
  • More aggressive grinding wheels will sometimes use #20/25 diamond grits.

• Bonding is the material that holds the diamond grits together. An optimized bonding formula should accomplish two things:
• Holds the diamond grits firmly to increase grinding lifespan.
• When the grits do grind away, it should expose the next layer of grits quickly.

Grit Size

• A #20/25 wheel grinds about 30-40% faster compare to a #30/40 wheel. (on concrete, with same bond)
• However, the lifespan is reduced by about 10%-15%

Bond

• For concrete under 4000 psi, the difference between a low cost bonding and a high end bonding isn't significant.
• For concrete over 4000 psi however, using an optimized bonding grinds 20-40% faster, and increases lifetime by 50-80%. They also feel a lot smoother during use.

With consideration to labor cost, the performance and lifetime you get with better grit and bonding will be well worth its higher cost.