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ptjw7uk
11-22-2007, 12:48 PM
Hi All,
Just won a Comet boring head on flea bay http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=170168916348&ssPageName=STRK:MEWN:IT&ih=007
and thought it would be useful, just need to make a holder for it.
Just measured the thread part and its 13/32 dia and 40 tpi done a search on the web and no joy for Comet or 13/32 40 tpi.
So is this a special thread or are they available over the pond!! or will I have to make a tap!!

Peter

macona
11-22-2007, 09:58 PM
Single point it in the lathe.