A COOL SITE ABOUT BOLTS..

[JRH]

I’m sure many folks know about this, but for those that don’t it’s good stuff.. I can totally Geek Out on the facts about the whys and wherefore of how bolts really work….OR don’t work…
when I worked on rigging boats along time ago we had no internet to learn from… bummer….self loosening and why it happens was/is quite amazing.
A great site for anyone working on stuff with bolts ……

www.boltscience.com

J.

 

[JK2369]

OK, now we’re talking:

“We specialise solely in bolting related matters providing consultancy, training and test services in this area. We have also developed software on the analysis of bolted joints which is in use world-wide across six continents.”

 

[JRH]

OK, now we’re talking:

“We specialise solely in bolting related matters providing consultancy, training and test services in this area. We have also developed software on the analysis of bolted joints which is in use world-wide across six continents.”

I never understood till recently ( sorta paraphrased here) is why if you tighten to much over recommended torque values it can actually cause it to loosen by damaging the threads clamping force that makes the bolt solid , SO, too little pressure = a no/ or weak clamp - to much force = a stretched thread and a weak clamp…
I have tightened thousands of bolts in to wood , steel, aluminum, fiberglass on boats and never torqued anything back then….the thought scares me now but everything mostly stayed put…. .???
maybe I just got used to the feel of a good turn of the wrench. Maybe just luck...I don’t know.
J.

 

[Nobodybusiness]

I never understood till recently ( sorta paraphrased here) is why if you tighten to much over recommended torque values it can actually cause it to loosen by damaging the threads clamping force that makes the bolt solid , SO, too little pressure = a no/ or weak clamp - to much force = a stretched thread and a weak clamp…
I have tightened thousands of bolts in to wood , steel, aluminum, fiberglass on boats and never torqued anything back then….the thought scares me now but everything mostly stayed put…. .???
maybe I just got used to the feel of a good turn of the wrench. Maybe just luck...I don’t know.
J.

Difference between 1 uga duga and a Grunt.
I guess grade 8 and 12.9 are a little more forgiving in the guesstimate torque.

 

[JRH]

Difference between 1 uga duga and a Grunt.
I guess grade 8 and 12.9 are a little more forgiving in the guesstimate torque.

After thinking on it… most everything that was a serious piece of gear on the sail boats usually used Nylock nuts..I dont remember one ever losing or failing… but that was back in the 80’s.that’s along time to remember stuff….

 

[Quattrohead]

First time I used a torque wrench in my whole middle aged life, on cells, I broke 2 studs off ?