Nut tapping machine

Details Nut tapping machine Nut tapping machine

1979-09-11

1981-11-10

Rosenbaum, Mark

10139R, B23G 144

Patent

active

042990017

ABSTRACT:
The invention provides a nut tapping machine of the type driven by a drive chuck assembly comprising two sets of shank-embracing driving chucks one of which is always in engagement with the tap shank to drive it and each set is releasable sequentially from engagement with the tap shank to allow the passage of a blank along the shank. The invention solves the problems of incorrect thread form associated with other known tapping machines by providing a blank chuck assembly including a set of inwardly movable jaws each having a first flat face for engagement with the exit surface of a blank to true the blank relative to the tap.

REFERENCES:
patent: 3056983 (1962-10-01), Devereux et al.

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