portass ‘s’ lathe thread

This topic has 4 replies, 3 voices, and was last updated 1 June 2013 at 12:58 by michael hobson.

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30 May 2013 at 17:03 #6729
michael hobson
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@michaelhobson77372
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30 May 2013 at 17:03 #121051
michael hobson
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@michaelhobson77372
Hi, I wondered if anyone knows the size and type of thread on the spindle end to take the lathe chuck backplate.The one on at the moment has been homemade and does not run very true.Any help greatly appreciated Thanks.
1 June 2013 at 09:05 #121181
JC Uknz 1
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@jcuknz1
Can you not measure it? Usually a thread has a diameter and number of threads per inch [TPI]

But possibly you would need to remove the existing pulley[?} backplate{?} to do this.
1 June 2013 at 09:20 #121183
JasonB
Moderator
@jasonb
They used "S type" to describe several versions so you will likely have to do as said and measure the thread, see here
1 June 2013 at 12:58 #121206
michael hobson
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@michaelhobson77372
Hi thanks for the replies,have measured and found the diameter to be 3/4",and 16tpi.
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portass ‘s’ lathe thread

portass ‘s’ lathe thread

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