Patent ID: 8468918

Claim:
A milling cutter ( 20 , 120 , 220 ) having an axis of rotation (R) and comprising: a generally disk-shaped cutter body ( 22 ), having two side surfaces ( 24 , 26 ) and an outer peripheral surface ( 28 ) therebetween, the axis of rotation (R) being perpendicular to the side surfaces ( 24 , 26 ); a plurality of circumferentially spaced apart cutting portions ( 36 ) located around the outer peripheral surface ( 28 ) of the cutter body ( 22 ); a central aperture ( 88 ) in the cutter body ( 22 ), having an aperture inner surface ( 90 ); at least two radially directed slots ( 92 ) in the cutter body ( 22 ), each slot ( 92 ) having a slot inner surface ( 94 ) opening out to the central aperture ( 88 ); two adapter members ( 40 , 42 , 240 , 242 ) located on either side ( 24 , 26 ) of the cutter body ( 22 ), each adapter member ( 40 , 42 , 240 , 242 ) having an inner side wall ( 44 , 52 , 152 , 244 , 252 ) in abutment with respective side surfaces ( 24 , 26 ) of the cutter body ( 22 ), the two adapter members ( 40 , 42 , 240 , 242 ) each having a central hole ( 60 , 260 ) and a drive keyway member ( 64 , 66 , 264 , 266 ); one adapter member ( 42 , 242 ) having at least two protrusions ( 68 , 268 ) formed on the inner side wall ( 52 , 152 , 252 ) thereof; one adapter member ( 42 , 240 ) having an axially extending circularly shaped raised portion ( 80 , 180 , 280 ) located on the inner side wall ( 52 , 152 , 244 ) thereof and being concentric with the central hole ( 60 , 260 ) thereof, the raised portion ( 80 , 180 , 280 ) having an outer surface ( 82 , 282 ) in juxtaposition with the aperture inner surface ( 90 ); and each protrusion ( 68 , 268 ) having a peripheral surface ( 74 , 274 ) in juxtaposition with the slot inner surface ( 94 ).