Built a quick and dirty thumb.

   / Built a quick and dirty thumb.
  • Thread Starter
#31  
Reckon that tweak would press right out have seen crowd rods bent a lot more than that :eek:
Yeah I believe I can fix it easily enough at work. I'll take it and use the 300 ton press to straighten it and keep it as a spare or use it on a tree shear or something.
 
   / Built a quick and dirty thumb. #32  
Reckon that tweak would press right out have seen crowd rods bent a lot more than that :eek:

What Pete said. Extend the cylinder all the way and use a press. Protect the ram to prevent scratches and scrapes while in the press. Wood works best.

I wouldn't use it bent. Risk destroying the seals.
 
   / Built a quick and dirty thumb. #33  
Thx for the photos!
 
   / Built a quick and dirty thumb. #34  
I think the consensus is "press out the bend in the rod, weld up the bracket, and go forth and sin no more!:D"
 
   / Built a quick and dirty thumb. #35  
I agree with everyone here about having the rod pressed straight, welding it back together, and continuing on. But I think I might add a set of triangle shaped gussets to the front edge of the mount. Not only would it add extra support to hold it square, it could also act as a barrier/deflector of sorts to push it aside of various obstacles.

Fantastic job so far, I'd not abandon something that's so near completion. Anyone who's ever made anything from scratch will tell ya that you've done a marvelous job. Work out the kinks and be proud of yourself.
 
   / Built a quick and dirty thumb. #36  
I agree with everyone here about having the rod pressed straight, welding it back together, and continuing on. But I think I might add a set of triangle shaped gussets to the front edge of the mount. Not only would it add extra support to hold it square, it could also act as a barrier/deflector of sorts to push it aside of various obstacles.

And might add some torsional strength to prevent twisting the claw.
 
   / Built a quick and dirty thumb. #37  
And might add some torsional strength to prevent twisting the claw.

Yea, that's the technical engineering term for my hillbilly-speak "holding it square". :)
 
   / Built a quick and dirty thumb. #38  
I agree with everyone here about having the rod pressed straight, welding it back together, and continuing on. But I think I might add a set of triangle shaped gussets to the front edge of the mount. Not only would it add extra support to hold it square, it could also act as a barrier/deflector of sorts to push it aside of various obstacles.

Fantastic job so far, I'd not abandon something that's so near completion. Anyone who's ever made anything from scratch will tell ya that you've done a marvelous job. Work out the kinks and be proud of yourself.

This bears repeating: "Work out the kinks and be proud of yourself".

Well done!

Terry
 
   / Built a quick and dirty thumb. #39  
What Pete said. Extend the cylinder all the way and use a press. Protect the ram to prevent scratches and scrapes while in the press. Wood works best.

I wouldn't use it bent. Risk destroying the seals.
Yep, local engineering firm has hardwood vee blocks for that purpose. Apparently there's a number of farmers around here that could join TBN to learn how to back drag
 
   / Built a quick and dirty thumb. #40  
Yep, local engineering firm has hardwood vee blocks for that purpose. Apparently there's a number of farmers around here that could join TBN to learn how to back drag

Here too Pete......
 

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