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Boxford 4.5” x 17” Precision Plain Lathe 9 months 2 weeks ago #56693

Oh, and 7tpi makes it BSF "fine" thread form, the standard BSW 2" thread is 4.5tpi :D

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Boxford 4.5” x 17” Precision Plain Lathe 9 months 2 weeks ago #56739

Scan from " 'The Scientific' The Story of the Cambridge Instrustrument Company" by Donald J. Unwin, ISBN 0 904355 07 1 - note Boxford Precision Plain lathe with collet drawbar, no counter pulley assembly, and motor on tower to rear of lathe, plus long belt (& partial cover).


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Boxford 4.5” x 17” Precision Plain Lathe 1 month 4 days ago #60109

The short spanners that came with the lathe have proved to be barely adequate for tightening the most often used nuts (top & side of the toolpost, 7/16ths Whitworth & 1/4" Whitworth) & sometimes not able to deliver the torque needed to undo them.

These sizes are available new, but I wanted vintage British made spanners - and one brand in particular is funnier than the rest ;)

The large Thor brand thwacker is probably too heavy at 560+g, but "helpfully" they are sold by head diameter (64mm) not weight.





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Last edit: by Jonny Retro.

Boxford 4.5” x 17” Precision Plain Lathe 1 month 3 days ago #60156

Jonny Retro wrote:
These sizes are available new, but I wanted vintage British made spanners - and one brand in particular is funnier than the rest ;)


:lol: Love it :P
If you can't fix it with a hammer, you've got an electrical problem mate :)

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Boxford 4.5” x 17” Precision Plain Lathe 5 days 6 hours ago #60929

I found the tool slide was tending to precess inwards, meaning that unless you held on to the dial the lathe wanted to cut make slightly cone shaped cut ... and once things got warm, the belt would ping off the motor spindle at inopportune moments :whistle:

A bit of tighening on the gib strips & angling the motor very slightly seem to have fixed things :)
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Boxford 4.5” x 17” Precision Plain Lathe 3 days 5 hours ago #60985

Today is Thor's day so time for some hammering. :silly:
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