straightening a threaded rod

[Gary Fowler]

I think Spyder is right on with the straightening method. I doubt that this rod has any temper as there is not reason for temper on it. It is likely just a piece of rolled steel with a threaded end that you could get made at any machine shop and then weld the top yoke from the old one to it. If you cant get it straighten, try taking it to a shop and have them thread you a piece of cold rolled with the same pitch thread. They could weld it on to the top yoke for you also if dont have the skills or equipment to do it yourself.

 

[Soundguy]

Ive cut and pasted when the thread was too bent. Of the ones Ive pasted, or just straightened, none had failed in the 1st place - but had been damaged by side forces. The ones straightened have not been re damaged or failed in use or been damaged in any way by their use as a link. They do what they were designed for. These things can be fixed in the time it takes to find and acquire a replacement.
larry

the side link on my yanmar 1700 was bent. i heated and straightened it. lasted about a year before it broke while i was hauling sand in a 3pt scoop.. left me stranded in t he middle of working on t he footer for my house.. had to run to town and get a generic turnbuckle and some ends and weld something up.

when a got a ford 2n with t he same damage.. i cut and pasted.. it has yet to ever break... 8? ys later...

soundguy

 

[Soundguy]

I think Spyder is right on with the straightening method. I doubt that this rod has any temper as there is not reason for temper on it. It is likely just a piece of rolled steel with a threaded end that you could get made at any machine shop and then weld the top yoke from the old one to it. If you cant get it straighten, try taking it to a shop and have them thread you a piece of cold rolled with the same pitch thread. They could weld it on to the top yoke for you also if dont have the skills or equipment to do it yourself.

sounds like a great candidate for allthread or similar.

soundguy

 

[SPYDERLK]

the side link on my yanmar 1700 was bent. i heated and straightened it. lasted about a year before it broke while i was hauling sand in a 3pt scoop.. left me stranded in t he middle of working on t he footer for my house.. had to run to town and get a generic turnbuckle and some ends and weld something up.

when a got a ford 2n with t he same damage.. i cut and pasted.. it has yet to ever break... 8? ys later...
soundguy

OK. Maybe it was too bent. Maybe not the right heat. Maybe the yanmars have links with zero performance margin and thats why it bent in the first place. Gotta pick your battles. I havnt had trouble on repairs over about six years. If I did I would give some critical inspection and thot to determine how I misjudged.
larry

 

[SPYDERLK]

I think Spyder is right on with the straightening method. I doubt that this rod has any temper as there is not reason for temper on it. It is likely just a piece of rolled steel with a threaded end that you could get made at any machine shop and then weld the top yoke from the old one to it.

Thanks, but Im betting it is a big jump between it and std allthread. I stretched some allthread with moderate torque once and that woke me right up! The link is probably Gr 5 equivalent. To preserve its properties while preventing cracking at the thread roots you want to staybelow around 650F. If bent enuf that the threads appear closed up it should be replaced because it will crack at the roots unless overheated [to red] and that much heat will definitely compromise the metal properties.
larry

 

[Soundguy]

OK. Maybe it was too bent. Maybe not the right heat. Maybe the yanmars have links with zero performance margin and thats why it bent in the first place. Gotta pick your battles. I havnt had trouble on repairs over about six years. If I did I would give some critical inspection and thot to determine how I misjudged.
larry

to be honest, the metal in the yanmar side link did not impress me.. it looked very porous.. like bad pot metal.. had the powdery oxide you see on junk metal. i thought this odd, since I was thinking jap metalurgy.. even in 79 was pretty advanced.

contrast that with the fairly even good looking steel on the 46 ford.. it was just an odd situation.. still after the break on the yanmar, i didn't take the chance on the ford.. I was using it for the same deal.. scooping dirt.

guess the factory worker making the batch of metal that day took a break and let someone else mix that pour that day my sidelink was made...

soundguy

 

[jimgerken]

Perhaps you need a new used one. I think there is a place to put a want ad on this TBN site. You would be asking for one from a guy who replaced his with a hydraulic one. There must be a few laying around under guys benches, right?

 

[SPYDERLK]

Sure. I got a bent one I straightened.

 

[Soundguy]

probably cheaper to hit a tsc or farm store.. buy their generic turn buckle, and then weld the 2 correct knuckle ends on it you need. probably salvage the ones from the oem lift link. that's what I did on my yannie.. 2-3Xbeefier than the original, and fit perfectly... not expensive either..

soundguy

 

[Brad_Blazer]

I would disassemble the part and use a piece of pipe over the threaded portion to straighten it. You can feel the yield point when it starts to move at constant force.
If you want to replace the allthread McMaster and Fastenal have the high grade stuff.