Patent ID: 6015338
Filing Date: 2000-01-18
Classification: A61B,A61M,B24B,B24D

Abstract:
A self-dressing abrasive tool comprising phenolic resin, 240 to 800 grit abrasive grain, hollow ceramic spheres, and powdered filler, wherein the abrasive tool is manufactured by a process comprising the steps:a) blending the phenolic resin, the abrasive grain, hollow ceramic spheres and the powdered filler to form a mixture;b) pressing the mixture in a mold to form an uncured abrasive tool;c) heating the uncured abrasive tool to about 155 to 165.degree. C. and holding the uncured abrasive tool at 155 to 165.degree. C. for 6 to 12 hours to form an intermediate bonded abrasive tool; andd) heating the intermediate bonded abrasive tool to a maximum temperature of at least 175.degree. C. and holding the abrasive tool at maximum temperature for 6 to 12 hours to embrittle the bond and form the abrasive tool, andwherein the abrasive tool effectively grinds cannulae to form needle tips which are substantially free of burrs.