All of Elliott's mirror-rolling tools are made from a selection of diamonds that can process most metal surfaces to 2-8 parts per million and can process cast iron to 15 RMS. 
The diamond-rolling tool can process parts below Rc40 to 2-8 parts per million at low cost. The knife has a disposable blade and a top-mounted precision natural diamond. If the diamond is worn, just replace the diamond. The roller can be. The diamond tool can be rolled without connecting the surface. This feature is achieved by setting the internal spring mechanism to allow a maximum of 0.005 inches of movement during the rolling process. 
The diamond-rolling tool can process parts below Rc40 to 2-8 parts per million at low cost. The knife has a disposable blade and a top-mounted precision natural diamond. If the diamond is worn, just replace the diamond. The roller can be. The diamond tool can be rolled without connecting the surface. This feature is achieved by setting the internal spring mechanism to allow a maximum of 0.005 inches of movement during the rolling process. Mounted Bearing Units,Flange Bracket Units,Mouted Bearing Units,Uk Series Bearing
HEBEI HAILAN BEARING MANUFACTURE CO.,LTD , https://www.hhbbearing.com