From: Snag_one@msn.com   
      
   On 1/18/2026 11:08 AM, Bob La Londe wrote:   
   > On 1/17/2026 7:14 PM, Snag wrote:   
   >>    I was installing some turnbuckle/chain sway control on the 3 point   
   >> hitch on my "new" tractor , and I was inattentive (I fucked up) and   
   >> bent the tension rods on my HF hydraulic jack press while pressing   
   >> some bolts out of the lower lift arms. I want to replace rather than   
   >> straighten and I'm thinking 4140 might be a good choice . I've   
   >> replaced the 12 ton jack it had originally with a 20 ton unit ...   
   >>    The original rods are 3/4" , I don't know what they're made of . I   
   >> can get enough 4140 in 3/4" for a not-outrageous price to have a   
   >> couple of feet left over for future projects . I figure the max   
   >> tension load on each will be around 20,000 pounds which should be well   
   >> within the limits of 4140 . Threads will be single point cut NF .   
   >>    Unless someone can recommend a better alloy for this ... I only   
   >> want to do this once !   
   >   
   > 4140 should be as good as you can get in a relatively common alloy. 1144   
   > is also very strong, much more easily machined, but not as weldable (hot   
   > short), and not as rust resistant.  If I had 4140 on hand I would use   
   > it, but for alloy steel my local yards only have 1144 and stainless   
   > (304).  304 is more easily (in my opinion) welded than 4140.   
   >   
   > First off.  I don't know what high tension rods you are referring to.  I   
   > have jack style 12 and 20 ton presses.  I don't think they have those.   
   > Which leads us into the next part.   
   >   
   > The cross pins that support the table on the press can support the full   
   > force of the hydraulic.  I can tell you first hand you will either tear   
   > the upright construction steel or bend the top cross member before those   
   > fail.  I've done both.  The cross pins on both of my 20 ton presses are   
   > about 0.780in.  Not much more than 3/4.  3/4 should be fine.   
   >   
      
       The rods I'm talking about go from the top cross member of the frame   
   to the cross member that the top of the jack pushes on . The plate/"ram"   
   the jack sits on slides on those rods . I'm going to order that 4140 , 6   
   feet for 63 bucks delivered . Shipping costs as much as the material !   
   --   
   Snag   
      I appreciated foreign cultures more   
   when they stayed foreign ...   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)