Loose gear box on bush hog

   / Loose gear box on bush hog #11  
.........brand new locking nuts with the plastic on them
Said with respect Eddie, they are gr 5 not 8 and the threads will stretch if they're under any type of constant vibration.
 
   / Loose gear box on bush hog #12  
Said with respect Eddie, they are gr 5 not 8 and the threads will stretch if they're under any type of constant vibration.

Are you saying the nuts are grade five? I’ll have to double check. I bought them from McMaster Carr and thought the bolts and nuts where both grade 8 when I changed mine.
 
   / Loose gear box on bush hog #13  
Are you saying the nuts are grade five?
Years....decades ago actually, I was to a fastener course. One of the few things I remember is that any locknut with the crimped/deformed section to hold the nylon insert was gr. 5 as gr. 8's couldn't be crimped like that. Supposedly that's why a gr.8 locknut is deformed by squeezing the taped part of the nut in.
Saying that, looking for this pic, they have gr. 8 with the nyloc insert so things have changed.
My apologies Eddie.
1729010553305.png
 
   / Loose gear box on bush hog #14  
We have a VERY good fastener place here, NO junk china bolts from them!

They insist that "crimped" lock nuts hold better than nylocks, (plastic) so when it really matters, all I will use is crimped nuts AND like on my rotor blades, I also use loc-tite along with them.

SR
 
   / Loose gear box on bush hog #15  
All I know is the nyloc nuts are as tight as ever and it has been 5 years or better since I changed to them.
 
   / Loose gear box on bush hog #16  
Use a #8 bolt with a wide nut drill small hole and use
a clip similar to this:

willy
1729129166369.png
 
   / Loose gear box on bush hog #17  
Just tighten it up extremely tight! It wont move. It wont loosen.
 
 

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