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Posted by Tony Jeffree on January 9, 2008, 8:15 am
Please log in for more thread options On Wed, 09 Jan 2008 11:07:27 GMT, "Richard Bradshaw"
>Hi, I am new to model engineering, apart from some lathe practice at school
>about 30 years ago so please be gentle with your replies.
>
>I have recently bought an X2 mill and an ER32 Collet chuck. These are both
>threaded M12 the same as the draw bar. Looking at some more items like a
>slitting saw arbour I found that most are 3/8th or 1/2 BSW. My problem is I
>only have a metric lathe so can't make a new draw bar with an imperial
>thread. Is there someone who sells these or a soource that has M12 arbours
>anywhere.
Alternatives:
1) Use lengths of studding (threaded rod) of the right diameter/thread
pitch
2) Get a couple of BSW threading dies to make your own
>
>Or is there a configuration with the change gears where I can cut an
>imperial thread on a metric lathe.
>
Depending on the change wheels that you have in your set, it may well
be possible to get a close-enough approximation to a 3/8" or 1/2" BSW
thread pitch. You aren't looking for extreme accuracy, so the pitch
error over the dozen or so pitches needed to hold the chuck may not be
a big issue. The "ideal" change wheel setup would need a 127T wheel,
but for this kind of application that may well be overkill.
Regards,
Tony
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>about 30 years ago so please be gentle with your replies.
>
>I have recently bought an X2 mill and an ER32 Collet chuck. These are both
>threaded M12 the same as the draw bar. Looking at some more items like a
>slitting saw arbour I found that most are 3/8th or 1/2 BSW. My problem is I
>only have a metric lathe so can't make a new draw bar with an imperial
>thread. Is there someone who sells these or a soource that has M12 arbours
>anywhere.
>
>Or is there a configuration with the change gears where I can cut an
>imperial thread on a metric lathe.
>