Driver for helical thread inserts

Details Driver for helical thread inserts Driver for helical thread inserts

B - Operations, Transporting

23

P

26/100

B23P 19/04 (2006.01) B23P 6/00 (2006.01) B25B 27/14 (2006.01)

Patent

CA 1061528

DRIVER FOR HELICAL THREAD INSERTS Abstract of the Disclosure The present invention is directed to an improved driving mandrel for insertion of spiral thread inserts into complemental- ly tapped bores. The mandrel comprises a generally cylindrical structure having a drive tooth at one end for engagement with the tang of an insert, the device being characterized by its being formed of a resilient polymeric material having rigidi- fying means located at a zone adjacent the drive end, whereby the body portion of the mandrel beyond the zone is subject to limited deflection under torsional and lateral displacing forces. In accordance with a preferred embodiment, the mandrel includes a readily compressible zone in registry with the trailing end of the insert, whereby the insert may be supported against elonga- tion and yet be free to contract as it is driven into the bore, greatly reducing the possibility of cross threading.

278610

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