The Shop > Tools
S3 Mini Lathe - Cross Slide Screw Mods
John Rudd:
Nicely done... :clap:
As to he plastic nuts, yes I've heard of folk using Acetal, cut the thread with a hot tap to make the thread more 'durable'....Cant remember where I saw this but it'll turn up with Google...
drmico60:
If you are thinking about plastic feedscrew nuts have a look at this post:
http://bbs.homeshopmachinist.net/threads/43645-Making-Acetal-leadscrew-nuts-the-easy-way?highlight=acetal
This seems to be a very easy method of making one.
For the 7 x lathes I think the big problem with a plastic feedscrew nut on the cross-slide is how to securely attach the nut to the cross slide. There is not much material nut material to screw into and not much scope to provide more material.
Mike
steampunkpete:
That's a brilliant idea, it would never have occurred to me to do it that way. I don't see any problem with fixing, one could start with a block of material, bore the hole for the thread off-centre, then split the block. The thread would be formed by heating whilst the block was clamped around the lead-screw. Finally, a couple of mounting holes could be drilled through the block perpendicular to the thread created, but off-set into the other half of the block. Drill two holes in the cross-slide off-set by the same amount and voila!
There are other possibilities for the geometry, the point being that the end result doesn't have to be cylindrical. Hmm, I might well add trying this method to my increasingly long to-do list.
There are Delrin lead-screw nuts on ebay, but none in left-hand thread apparently.
http://www.ebay.co.uk/itm/MINIATURE-8-MM-DELRIN-NUT-FOR-CNC-M8-LEAD-SCREW-2-pieces-/151245436723?pt=LH_DefaultDomain_0&hash=item2336ee3733
drmico60:
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
S. Heslop:
--- Quote from: drmico60 on September 20, 2014, 08:05:08 AM ---If you are thinking about plastic feedscrew nuts have a look at this post:
http://bbs.homeshopmachinist.net/threads/43645-Making-Acetal-leadscrew-nuts-the-easy-way?highlight=acetal
This seems to be a very easy method of making one.
For the 7 x lathes I think the big problem with a plastic feedscrew nut on the cross-slide is how to securely attach the nut to the cross slide. There is not much material nut material to screw into and not much scope to provide more material.
Mike
--- End quote ---
If it's made that way, the original nut (or a copy) could be bored out and the round acetal nut pushed/ glued into the hole.
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