Internet Horology Club 185
broaching bushings.

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/6346047761/m/705101091

April 18, 2004, 15:19
Kevin Pestor
broaching bushings.
I need to broach some bushings on a clock.I was wondering could i take a twist drill of the diameter i need and grind the lead off the end of it to use to size my bushings?
The main thing i would think is the finish of the hole may not be smooth enough for the pivot to run in.
I hope some good clock people out there can help me.
April 18, 2004, 20:49
Tom Seymour
Kevin, there are 5 sided cutting broaches in various sizes for enlarging the hole in your bushings. You should use a smooth broach for burnishing the hole. A drill bit would leave too rough a finish in the hole.


Tom
April 21, 2004, 19:55
Kevin Pestor
Thanks Tom, guess i will wait till saturday to broach my bushings at my course.
April 21, 2004, 22:42
Tom Seymour
Kevin,
Keep us updated on how it goes.


Tom