PFERD Bench grinding wheel is made of regular aluminum oxide in a vitrified bond. These products are particularly suited for high-speed steel (HSS), steel, cast steel and cast iron. Application: Deburring at semi-finished steel and cast products. Regrinding and sharpening of HSS tools like drills and turning tools. Various maintenance applications. Recommendations for use: If a bench grinding wheel starts to show signs of loading, use dressing stones on page 28. Suitable tool drives are bench and pedestal grinders. Safety recommendations: The maximum speed is calculated in accordance with ANSI B7.1. Never exceed the maximum RPM listed on wheel labels. CAUTION: Smaller spindles frequently run at higher RPMs. Prior to mounting, all wheels shall be visually inspected for damage and cracks. Perform the ring test before mounting. An undamaged wheel will give a clear tone. Specification: 8" Diameter; 1" Thick; 1-1/4" Arbor Hole; 80 Grit; 3600 RPM Maximum Rotational Speed.