Cartridge Rolls: Complete Guide to Types, Grits, Applications & Mandrels Construction, shapes, grain types, grit selection, mandrels, RPM limits, porting applications, and a brand-by-brand comparison everything machinists, fabricators, and engineers need to specify and use cartridge rolls correctly. SPECIALTY ABRASIVESUPDATED 20253M · PFERD · NORTON MERIT · STANDARD ABRASIVES What's In This Guide What Are Cartridge Rolls? Straight, Tapered & Spiral Shapes Grain Typ …