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I Forge Iron
Anachronist58

Split Nut Workholding

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Posted (edited)

I have a six foot length of 3/4-10 threaded rod.  Dad had it driven into the ground at the Old Place, to stake a tree.

As I often clamp bolts in the "vise", I usually double-nut the bolt, and clamp on the nuts, to protect the thread,  and to increase grip force.

This rod is in need of Restoration:

20200525_100408.jpg

Just try running a nut three feet down that.  Hence, the Split nut, to hold the rod securely, especially in a leg vise, whilst I treat it with 40% ascetic acid (strong vinegar), followed by a massive cup wheel.

20200525_100017.jpg

Works so well, I am sure that I will be using these for other work - think straightening threads on the press.......

Robert Taylor

Edited by Anachronist58
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Excellent idea. I usually run a die a ways then two nuts locked together. This is a much better solution to protecting threads when a vise is needed to hold a rod or large bolts.

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Yes, IDF&C, this particularly rusty thread would take the bite right out of the only 3/4 - 10 die I own.

I once made one of these with a hinge - hint: takes two nuts, or a competent weldor to build from a single nut...  

Robert Taylor

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Wood jaw inserts in a vise hold the project tightly without marking the work.  Softwoods work, hardwoods hold stronger.

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Al angle or copper jaw covers do a pretty good job too.  I have some worn old dies; I keep around for "clean up jobs".

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I am a fan of wood, copper, and aluminium jaw covers, methinks I will make redundant sets of heavy copper covers, that I will not mind thrashing.....

I must say though, that these split nuts have been a lot of fun to use, and were well worth my time to make.

Robert Taylor

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