Captive nut confusion

Captive nut confusion

This topic has 7 replies, 4 voices, and was last updated 8 November 2018 at 13:29 by Jeff Dayman.

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14 October 2018 at 13:50 #9373
Paul Ainsworth
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@paulainsworth93685
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14 October 2018 at 13:50 #375893
Paul Ainsworth
Participant
@paulainsworth93685
I want to make a new threaded bar for my tying vice, it has a disc on each end, one is fixed and can simply be pinned/glued, the other has to rotate but not fall off the bar, this end goes under the table and stays still whilst the bar rotates slightly as it is tightened.

What's the best way to do this? I'm thinking no thread/hollow piece on top of bar and knock it over, surely there must be a better way?
14 October 2018 at 14:55 #375902
Michael Gilligan
Participant
@michaelgilligan61133
You don't mention the thread size, Paul … but I suspect it's fairly small.

Options would appear to be:
1. Replicate what's already there [which, as you noticed, is pretty horrible]
2. Drill & Tap the end of the screw, and use a small countersunk screw [fixed with 'screwlock' retainer].
3. Turn a reduced diameter on the end of the screw, and thread that … then make a thicker washer with a countersunk, or counterbored, hole and fit a suitable nut [again, fixed with 'screwlock' retainer].
MichaelG.
14 October 2018 at 15:29 #375912
Paul Ainsworth
Participant
@paulainsworth93685
Thread is M10 x 1.5

Suggestion number 2 looks ideal, I have a bit for countersinking M3 cap screws.

Thank you
14 October 2018 at 15:40 #375915
Neil Wyatt
Moderator
@neilwyatt
It's not usual to put a spigot on the thread, use a dished plate and rivet over the end of the spigot.

Neil
8 November 2018 at 11:22 #379738
Paul Ainsworth
Participant
@paulainsworth93685
I decided to go the whole hog and make a new C clamp and went with a Delrin pad and ball joint.

Edited By Paul Ainsworth on 08/11/2018 11:22:50
8 November 2018 at 11:39 #379739
Neil Wyatt
Moderator
@neilwyatt
Neat
8 November 2018 at 13:29 #379755
Jeff Dayman
Participant
@jeffdayman43397
Nice job Paul, well done.
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