The end cap was beat up so I decided to try cleaning it up.
First I chucked up some aluminum.
I turned some steps, only the front one matters although the other ones will be used to true it in the chuck if I need to use it again.
Setting the threading tool.
Interestingly enough, the thread seems to be 24 tpi, not metric.
Cap screws on.
I filed the radius and faced the front.
You can see it's a trifle messed up.
I removed a little bit at a time.
Until it was clean.
I then knurled it. I had to adjust the rollers again to get a full depth knurl. If I do it again I'll order slightly finer knurls as these were pretty coarse.
Not bad?
A little abrasive brushing removed the burs and such.
3 comments:
Night and day on the knurling. I was thinking you'd need to use a thread restoring or riffling file to clean up the knurls, but those look great. Let us know what you blue it with.
a rookie question, it looks like you cut the threads with the compound at 90 to the work. I say compound, i can't tell, maybe just a cross slide.
but if compound, why is it set at 90, and not the approx 1/2 of the thread angle, ie 29 - 30 degrees?
I'm not arguing with success, you realise :)
alistair
It's hard to tell from the pics but the compound was set at 30. But Sometimes I will just plunge in with the cross slide rather than feed at an angle with the compound on a small thread like that.
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