Nippon electrical industries supplies 100mm disc grinders [model g1osb] that contain a powerful motor of 600 w with no load speed of 12000 rpm. These are high-performance grinders with lightweight shockproof double insulated engineering plastic body. The disc grinders find application in all weld dressing work, foundry grinding and in cutting of risers and runners. They are especially useful where fast and continuous cutting is required for continuous production, grinding and cutting work.