Finishing and abrasive tool

摘要

A finishing star or spinner abrasive tool is formed of inner and outer packs of square sheets of abrasive cloth or sandpaper with the inner packs angularly offset from the outer packs on the mandrel axis. Each sheet is formed with discontinuous radial slits extending beyond an unslit center section around a center fastener forming the mandrel drive hole. The slits provide surface flexibility while maintaining sheet integrity as it wears to circular form. An optional backing core is provided in the middle of the tool in the form of a cloth-sisal quilt acting as a cushion backing for the sheets, and which may retain coolant or compound during operation. The tool has longer working life with improved flexibility and working characteristics.