A TAPPING CHUCK WITH STRAIGHT SHANK, FOR MULTI-RANGE COLLETS, ADJUSTABLE BACK-JAW. IT IS A NON-REVERSING CHUCK; CHANGE OF TAPPING DIRECTION IS MADE BY MACHINE SPINDLE. THE TENSION AND COMPRESSION IN THE UNIT IS INCREASED TO ACCOMODATE EXCESSIVE SYNCHRONISATION INACCURACIES. OTHER FEATURES INCLUDE ADJUSTABLE HARD START AND RIGHT HAND AND LEFT HAND TAPPING. DESIGNED FOR USE ON NC MACHINES, LATHES AND ALL MACHINES WITH CONTROLLED FEED.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6. CN 84661038 FOR OTHER TOOL HOLDERS. NOTE 2(B) TO SECTION XVI.