Need All-Thread That Reduces Galling

[bulletpruf]

I have a tool that I use to remove and install coil springs in AMC cars that uses 5/8" all thread. The all thread has to take a fair amount of force and it recently got to the point where it was un-useable. Isn't there some type of all thread that is made for this application? Something that reduces galling?

This isn't the one that I have, but it's similar:



Thanks,

Scott

 

[MJD1]

Acme thread

 

[LXCam]

Yup, acme. McMaster Carr is your friend here Scott

 

[Firebrick43]

So typically if long screws are used constantly in applications with high loads they use an acme screw. If kept reasonably lubricated they last much longer than a 60 degree thread form, which in reality 60 degree threads isn't made for applications like that but commonly is used due to price.

ACME lead screw sections are easily available from places like mcmaster-carr but it does have a lower thread count. Probably will still have less torque to move it due to lower friction of the threads.

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[Firebrick43]

well ****, shouldn't of looked up a link and I would have been first

 

[bulletpruf]

Y'all are awesome. That's exactly what I need.

It wouldn't be such a big deal to replace with regular all thread if there's a Lowe's or Ace nearby, but if I have to compress springs at the race track, I'd rather have something that's not likely to seize.

 

[Firebrick43]

I ran a 5/8-11 SAE thread and a 5/8-8 ACME thread thru a load calculator.

For a 2000lbs tension load the 5/8-11 SAE needs 21 ftlbs of torque to the nut

For the same load the 5/8-8 ACME needs 19 ftlbs of torque to the nut.

 

[bulletpruf]

I ran a 5/8-11 SAE thread and a 5/8-8 ACME thread thru a load calculator.

For a 2000lbs tension load the 5/8-11 SAE needs 21 ftlbs of torque to the nut

For the same load the 5/8-8 ACME needs 19 ftlbs of torque to the nut.

Thanks for that info.

 

[Steve_P]

McMaster sells grade 8 threaded rod and coupling nuts. That and some moly lubricant should be enough for this purpose. Of course, an Acme thread is superior if you want to spend the $.

 

[tarbellb]

2ft of 5/8" Acme from McMaster $14 !

Not a bad price honestly

 

[rsanter]

Hardened acme thread or at least hardened


on the other hand I’m going to say toss that junk, yes I know many people love those spring compressors but they are junk.
i have had 100 mustangs over the years and I used to have a mustang shop, that is not what I used for compressing springs

 

[Jagmandave]

Yep, acme thread, don't forget to get the Acme nuts and some hardened washers too.

I use gear oil to lube the threads, it lasts way longer and makes everything easier to turn. I just dip my finger in the jug and drip some on, run the nuts up and down a couple of times and it's good to go. I use it on my pullers too, anything that gets regular use.

I had to make a puller using some 14mm all thread, and gear oil saved the threads, I've used it a long time now.....

 

[OccupantRJ]

If you stay with a V thread you might consider B7 threaded rod.
Acme will ultimately be better overall.

 

[bulletpruf]

I picked up 2' of Acme threaded rod in 5/8 - 8 and a few Acme nuts, too, from McMaster-Carr. I'll use moly lube on it as well.

Thanks for all the input.

Scott