Mechanics and Construction > Mechanics and Construction

About locking screws down

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boyardee12:
Iim wondering are there any nuts that lock on the screw and wont nudge even if  i don't tighten it all the way if not  is there some kind of thing that lock down on the screw. I'm asking this because i need to have the arms of a gripper loose and when i use just a nut i have to unloosen it a little and then the nut get more and more loose.

the screws/bolts im using ar e 3/8 and 5/16 btw

Steve Joblin:
try using two nuts... screw the top nut down hard on the bottom nut and both will "lock" onto the bolt.  The other alternaive is to use thread lock.  Yet another alternative is to position the nut where you want, then drill a hole through the nut and bolt, and then secure it with a cotter pin.

pomprocker:
make sure the second nut is a locknut

http://en.wikipedia.org/wiki/Locknut

ed1380:

--- Quote from: pomprocker on March 12, 2008, 02:28:25 PM ---make sure the second nut is a locknut

http://en.wikipedia.org/wiki/Locknut

--- End quote ---
not necessary. both nuts can be regular. just tighten them against each other

Spoil9:
If you have a way to drill, you could drill a hole in the end of the bolt and use a castellated nut, or buy some red Loctite.
I believe Blue Loctite is stronger than Red but I may be backwards. By using the lesser of the two you can take it off later if needed with out a lot of hassle.

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