1. Operating Speed: 700-800 RPM

2. Wet use strongly recommended and the more water the better

3. Do not apply too much pressure on bush hammer. This will prevent roller from stopping and thus decrease the life span of the tungsten steel

4. After each use, please clean up rollers, dry and apply oil to the spindles. It will be ideal to submerge the rollers in oil to prevent spindle rust

5. Roller tips can be re-dressed with diamond blades when they become inefficient.