[TR] spring compressor

[Dave]

The key word being "enough."  ;-)

I did just that drilling for a clevis pin which is much more convenient that torquing down a jam nut anyway.  But I never subjected mine to such abuse.  But the compressors I have used made from hardware store all-thread tend to gum up the threads after only a couple of uses.  This one is still good as new.  And I have a spare piece of acme thread (the shortest piece I could buy was twice as long as I needed).

 

 

Dave Massey


 

 

-----Original Message-----
From: Randall <TR3driver at ca.rr.com>
Cc: triumphs <triumphs at autox.team.net>
Sent: Sat, Dec 27, 2014 1:37 pm
Subject: Re: [TR] spring compressor



 


  
What type   of threads are used on this compressor?  If they are Acme threads you   cannot use a "Jam Nut" since that thread is   designed to NOT lock up.   
  
 

Try it sometime.  I think you'll find that they do lock, just not as tightly as vee threads.  With enough torque, they still lock pretty tight.
 
If you want a permanent joint that won't turn even under extreme torque, drill a hole lengthwise through the threads and drive a hardened pin into the hole.  I used that on a hub puller I built with 1" ACME rod (using a second nut to lock the first one during the drilling process), and the nut/rod joint took all the torque I was able to throw at it, even with a 1" drive impact wrench and standing on the end of a 6' section of pipe.  It literally crushed the rod lengthwise, but the nut never moved on the rod.

 
 -- Randall 



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