Valve seat grinding stones used to only come in coarse and fine grinding stones. This was because valve seats were typically made of plain cast iron or hardened steel at the time. Only two abrasive specifications were needed to properly grind valve seats.Today the situation is completely different, as valve seat materials have become very specific to the application on today’s engines – alloys of multiple metals, powdered metals, super-hard materials, all designed to extend the seat’s ability to seal against the valve head.
To meet these various needs, RUIZUAN offers six different abrasive formals for grinding valve seats:General Purpose,Stellite,Nickel ,Chrome,Cool Blue,Finishing,Ruby