From: Snag_one@msn.com   
      
   On 1/18/2026 3:41 PM, Bob La Londe wrote:   
   > On 1/18/2026 1:27 PM, Snag wrote:   
   >> 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 !   
   >   
   >   
   > Looks like my post for McMaster didn't show up.  It was 50 bucks and 40   
   > bucks shipping at Mcmaster Carr.   
   >   
      
      This is for a piece 6 feet long , that 63 bucks was before they added   
   sales tax . which brought the total to 70 bucks . I'll probably order a   
   piece of hex stock to make new nuts , depends on how they look when I   
   get it disassembled .   
   --   
   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)