Single point with a tap?

Single point with a tap?

This topic has 5 replies, 4 voices, and was last updated 24 February 2015 at 14:06 by Vic.

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24 February 2015 at 13:26 #15763
Vic
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@vic
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24 February 2015 at 13:26 #181014
Vic
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@vic
I may need to cut an internal M42 X 1.5 thread in a steel part. I don't have an internal single point tool in my arsenal but I do have a M10 X 1.5 tap and was wondering if I could use this mounted in the tool post. I seem to remember reading about someone doing this. Anyone tried it, is it easier or more difficult than a single point tool? Thanks in advance!
24 February 2015 at 13:37 #181015
John Stevenson 1
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@johnstevenson1
Yes no reason not to. Many people use just one insert out of a Coventry die head.
24 February 2015 at 13:40 #181016
Jon Gibbs
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@jongibbs59756
This may help…

**LINK**

Jon
24 February 2015 at 13:48 #181017
norman valentine
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@normanvalentine78682
I have done something similar when trying to cut a 40TPI thread on a metric lathe. I used a 1/4 40TPI tap in a handle and hand chased the thread. I was using two aluminium castings as lens mounts. one was very successful but on the other it skipped a bit but I was still able so screw the lens in.
24 February 2015 at 14:06 #181019
Vic
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@vic
Many thanks guys. That link is great Jon, just what I need!
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