Angled Half Nut

[rgsparber]

This article was the joint effort of Larry Rudd and myself. Starting with the “Smart Nut” manufactured by Rod Grantham, we modified the idea a bit. It was written for those new to the metal working hobby.


The Angled Half Nut slides on a threaded rod yet locks securely when tightened. They are easy to make, just hard to design and analyze. Almost half of the article is analysis if you are a math geek.


If you are interested, please see

http://rick.sparber.org/ahf.pdf

[DIYer]

Didn't even know these things existed! Though I wouldn't use these myself (for safety reasons), this post is much appreciated in that I learned something new today.

[rgsparber]

The warning on page 2 does present the limitations of this design:

"We do not recommend using the Angled Half Nut in applications involving safety.
It is designed for easy install and remove but does not have the strength of a full
nut. In a single test, a 3/8-16 Angled Half Nut machined into 1" thick 6061 failed
at a torque of 225 inch pounds. A 3/8-16 regular tapped hole in the same material
failed at 400 inch pounds."

Rick

[kbalch]

Thanks Rick! I've added your Angled Half Nut to our Milling category, as well as to your builder page: Rick Sparber's Homemade Tools. Your receipt:

Angled Half Nut by Rick Sparber

tags: milling

[Kevin45]

Didn't even know these things existed! Though I wouldn't use these myself (for safety reasons), this post is much appreciated in that I learned something new today.

You'd be surprised as to how much you would use them. You can buy knobs through different places like travers, Enco and such. A lot of places will call them "Quick Change Knobs" and they come in all different sizes from #10 on up. I use them on the belt covers of my 6' mower deck to make taking the covers on and off quicker.

[DIYer]

Thanks guys. My main hobbies involve cars and bicycles, so you'd understand my safety concern. But for other purposes, I'd probably begin using them.