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S3 Mini Lathe - Cross Slide Screw Mods

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steampunkpete:

--- Quote from: drmico60 on September 20, 2014, 09:22:32 AM ---I do not understand what you are proposing for mounting the nut. If and when you make and mount a delrin/acetal nut then please post so photos.
Mike

--- End quote ---

Well, for example, if you look at the Delrin nuts on the ebay link you will see that they are not cylindrical, they are in the form of a block. There are two holes drilled in the block for mounting. As those two holes are not on the centre-line of the thread, they can drilled thru'. Two corresponding holes must be drilled in the cross-slide body for fixing the nut to the body.
So start by drilling the hole in the block, split the block, then clamp the two halves together and form the thread. Same method but start with a block rather than a round bar.
That block shape means that the problem of not much material to screw into has been overcome.
If and when, I will post.
Regards
Pete

drmico60:
This may be just possible. The existing brass nut is 16 mm square and the feedscrew is 10 mm  major diameter. This means that there is only 3 mm of material either side of the feedscrew hole. I do not remember how wide the slot in the carriage is but  I think it is about 20 mm so it  may be possible to gain an extra mm or two on the width of the nut to allow for screw holes but it is going to be a squeeze to fit it all in.
Mike

steampunkpete:
A quick measure up suggested a width of a bit over 30mm being available. Next time I go out to the garage I'll check it again. Measure twice, cut once!
Thanks for the heads-up.
Pete  :thumbup:

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