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Harrison 140 lathe question

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Ian.C:
Hi Trevor, Thanks for the information. I ended up leveling it really well. I am still trying to get my head around all the levers and their functions! I still cant figure out what the lever to the right of the half nut lever is for - I am new to the machining world. Ian

awemawson:
You'd expect to find three levers on a lathe carriage:

Threading Half Nut Engage

Feed Engage

and

Select Long Feed (Z) or Cross Feed (X)

In addition some lathes with the ability to knock their feed off when hitting a stop will also have a knob to adjust the force needed to 'knock off'

AdeV:
This drawing might help... it's of the Harrison L11, but according to the source site (www.lathes.co.uk - well worth finding your lathe on there & reading about it), the internals of the 140 are basically the same. So all the levers and wheels should be the same... (famous last words):



Here's a link to the 140: http://www.lathes.co.uk/harrison/page13.html

Ian.C:
Thanks again everyone. It was the leadscrew engaging lever I was referring to according to the above image, I have been using the feedshaft engaging lever to traverse the "X" axis when machining along the length, which of these two levers operate the half nuts. I am assuming that the lead screw is for creating threads and the feedshaft is for the cross slide operation?? :Doh:

awemawson:
Correct  :thumbup:

Keep the screw feed for threading to preserve the accuracy of the screw shaft.

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