Technique name for fastener locking

[bayseven]

Sorry no pictures,not allowed at work but imagine the end of a bolt with a nut threaded on to it flush to the bolt end. Now a small set screw inserted into the threads between nut and bolt parallel to bolt effectively locking nut in place. What is this technique called?

Crude drawing. Messy blob is the set screw

 

[K'ledgeBldr]

Not sure the “technique” has a name as you describe (kinda like a shear pin/key) but your description sounds a lot like Anco’s Pin lock nut-

ANCO®PN-LOC® Structural Locknut with Pin - Lok-Mor, Inc.

With a patented, non-breakable stainless steel ratchet pin, this all-metal, self-locking nut is the industry standard for structural locknuts.

www.lok-mor.com

 

[Walkers]

I’d just call it silly, because there are so many better ways of doing it. It is just a one and done set up, and very unrepeatable.
Try calling it a lock screw, or a locking set screw?

 

[RPH]

I’ve seen locking systems like this used on servo drive systems.

 

[Hank11]

Its sometimes called a "Dutchman".

 

[Viper98912]

I've never seen something like this. Why would you do this? Do you need to drill a hole into the end or something before you drive in a set screw?

 

[kwb]

Problem with this strategy is that the main bolt actually can't do the right amount of clamping because you won't be able to torque the fastener properly. Might as well just use a Clevis pin

 

[bayseven]

I would never attempt this " lock?" I saw it at work and thought it was let's say ,interesting. I tried Google but hard to find something without a name. Guess it is not a common process.

 

[Jinks]

Any chance this is what you're looking at? www.lok-mor.com/products/anco-pn-loc/

 

[floyd]

This looks like what you’re describing. Factory installed caster wheel assembly from an old Hein Werner floor jack.

 

[kaymccampbell]

I've seen that on 19th century machinery. I'm not sure if it was original, or a user redesign. The ones I've seen, the pin shared the thread pitch with the shaft, so you could pin it once every turn of the nut. They all were extremely fine pitch.

 

[PCustoms]

This looks like what you’re describing. Factory installed caster wheel assembly from an old Hein Werner floor jack.

Isn't this just staked in place?

Old school thread locking method....

 

[blazemaster83]

Pretty common repair in a machine shop. Ive seen it and used it many many times. Dutchmans key

 

[ArcReactorKC]

We called it a dutch lock when I worked industrial maintenance at a spring shop. The pistons constantly unscrewed themselves from the shaft in our pneumatic actuators, this is how we stopped it. Worked well for the application.

 

[bayseven]

Thank you everyone. Dutch(man) key it is. I knew someone here would know it! Great knowledge source, beats Google