Abstract Device for the driving of a tool by means of the spindle of a machine-tool in which one of the two elements - spindle-tip of the machine and tool - is provided with at least one axial lug engaging in a matched groove of the other element so as to ensure the driving of the tool by means of the spindle independently of the friction drive which exists between the taper of the tool and the tapered bore of the spindle, characterized by the fact that one of the elements - spindle-nose and tool - carries a part set up onto it so as to be angularly adjustable, this part being provided with said lug or groove, the whole being so arranged that the angular position of the spindle relative to the tool is adjustable when the latter is set up into the spindle and when said lug fits into said groove.
In a machine tool having a drive spindle with a socket for receiving a tool holder assembly, said tool holder assembly comprising a tool holder and a drive ring releasably secured thereto, an axial lug on one of said spindle and drive ring, a complementary axial groove on the other of said spindle and drive ring to receive said lug for driving engagement, said tool holder including external teeth around the periphery thereof, said drive ring having complementary internal teeth to drivingly mesh with the teeth of said tool holder in any of a plurality of relative angular positions, means for releasably securing said drive ring to said tool holder and to prevent axial displacement therebetween in any of said plurality of relative angular positions, whereby said tool holder can be released and angularly relocated relative to said drive spindle without relative angular movement between the drive spindle and the drive ring.
Claim 2
Dependent Claim
152 words
In a machine tool having a drive spindle with a socket for receiving a tool holder assembly, said tool holder assembly comprising a tool holder and a drive ring releasably secured thereto, an axial lug on one of said spindle and drive ring, a complementary axial groove on the other of said spindle and drive ring to receive said lug for driving engagement, said tool holder including external teeth around the periphery thereof, said drive ring having complementary internal teeth to drivingly mesh with the teeth of said tool holder in any of a plurality of relative angular positions, means for releasably securing said drive ring to said tool holder and to prevent axial displacement therebetween in any of said plurality of relative angular positions, whereby said tool holder can be released and angularly relocated relative to said drive spindle without relative angular movement between the drive spindle and the drive ring.