CRYSTAL ABRASIVE offers special thickness dimension (8500SFPM-43M/SEC) and higher speed machines to the automotive, truck, diesel, aircraft, and also to many engine rebuilding shops for dimensional accuracy, corner radii and surface finish as well as large stock removal. Most of crankshaft wheels are type 1,5,7,8,10 and 21 ranging from 18"(455mm) up to 48"(1220mm) in diameter and 1/2"(12.7mm) to 2.1/2" (63.5mm) thickness.