CUTTING ACCESSORY FOR USE WITH A SURGICAL HANDPIECE, THE ACCESSORY HAVING RETENTION FEATURES THAT FACILITATE THE FINE OR COARSE ADJUSTMENT OF THE ACCESSORY SHAFT

摘要

A surgical tool system including a handpiece with a motor and a cuttingaccessory with a shaft that is rotated bythe handpiece motor. The handpiece includes a coupling assembly with plurallocking elements for holding the accessory shaft toan output drive shaft that is actuated by the handpiece motor. The lockingelements are longitudinally spaced apart from eachoth-er. The accessory shaft is formed with retention features against whichthe handpiece locking elements engage. The shaft retentionfeatures are in columns. The retention features in adjacent retention featuresare longitudinally offset from each other. This allowsthe coarse or fine adjustment of the extent to which the accessory shaftextends forward from the handpiece coupling assembly.