Screwcutting Acme threads

[not done it yetParticipant @notdoneityet]

Nice one, John. If no hydraulic ram I suppose lesser mortals could rrange a means of pulling it down with threaded jack bolts, or even a threaded cap and suitable washers beneath.

 

I have progressed from my initial findings (of melting acetal and casting), thu drill core size and squeeze, to this method over a few months.

 

The heat and squeeze method is still more appropriate for Richard's half nut, I think, but yours for round is good. Next logical step might be whether a lathe leadscrew nut might be made in all delrin (with just a metal insert for the holding bolt/screw), rather than using delrin as an insert in the old worn out body.

Edited By not done it yet on 19/10/2016 08:15:40

[Michael GilliganParticipant @michaelgilligan61133]

A slight digression, if I may:

MarchantDice [who I think probably know better] are listing this on ebay **LINK**

http://www.ebay.co.uk/itm/TR12x2Dx600mm-2mm-Pitch-Trapezoidal-Acme-Ballscrew-Leadscrew-Fine-Pitch-/311308776672?hash=item487b72f4e0:m:mKxSqvo3Vh7GwWiplZX-0tg

So far as I am aware: Trapezoidal does not equal ACME, and neither form qualifies as a Ballscrew.

MichaelG.

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