Announcement

Collapse
No announcement yet.

Welding Grade 5 Or 8 Bolts

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Welding Grade 5 Or 8 Bolts

    Can You Stick Weld Either A Grade 5 Or Grade 8 Bolt At The Head To Something Without Losing The "hardness/temper"?

    I Asked This On The Hobart Forum But Differently.

    One Suggestion Is To Use Cold Roll Rod, Thread It, Then I Guess I Can Harden It With Harris's Flame Hardening Compound.

    I Am Having To WELD A New Thread Onto Forklift Anchor Eyes Which Attach To The Roller Chains Which In Turn Do The Lifting.

    Clark Lift Wants $300 Each For These 8" Threaded Anchor Bolts And That Is No Joke. Can't Find Them Anywhere.

    Any Help, Much Appreciated!!


    Thanks
    John

  • #2
    Originally posted by JOHN1
    Can You Stick Weld Either A Grade 5 Or Grade 8 Bolt At The Head To Something Without Losing The "hardness/temper"?
    No.

    Clark Lift Wants $300 Each For These 8" Threaded Anchor Bolts And That Is No Joke. Can't Find Them Anywhere
    Can you fabricate some without welding?
    Jeff

    Comment


    • #3
      No, Because The Head I Am Trying To Weld To Is For The Roller Chain.

      Thanks

      Comment


      • #4
        welding hardened bolts is a no no, i plug welded some grade 8 1/2" bolts to mount a vise to a bench. when i went to tighten them i barely got them tight and they pulled right out breaking flush with the welded part.

        making forklift parts is a big risk they take alot of stress, i would machine it if possible out of something better than 1018
        The one that dies with the most tools wins

        If it's worth having, it's worth working for

        Comment


        • #5
          I know $300 seems a lot but what will a trip to ER or worse cost? I'm all for saving money but this doesn't seem like the one to do it on. God lick whatever you decide.
          Dennis


          Thermal Arc 185-TSW
          Millermatic Challenger 172
          VictorO/A
          Atlas Craftsman 12 by 24 Lathe
          Esab PCM-875
          Wholesale Tool Mill-Drill

          Comment


          • #6
            you could machine the part out of annealed 4140 or simmilar and have it heat treated..hmmm May be cheaper to spend the 300 on a guaranteed part.
            Trailblazer 302g
            coolmate4
            hf-251d-1
            super s-32p
            you can never know enough

            Comment


            • #7
              Liability is the reason for the 300 bucks and they know you have to go to them to get it

              Comment


              • #8
                Hardened bolts are welded all the time, they actually weld very well. Bolts are not carbon hard, they are low carbon low alloy, very similar to welding rods. Is there any heat treating to a grade 5 bolt or is it the material its made of?

                Comment


                • #9
                  Sberry, I believe the higher grade bolts are of a better alloy. If they were hardened plain carbon steel they would be breaking like carbon taps

                  Welding something hardened/heat-treated like drill bits is best dun with silver-brazing. Silver has a very high tensile strength just as long as it doesn't get hot while in service. The low melting point doesn't affect the hardness very much. If you do try welding something heat-treated you will have a small area around the weld where the hardness has been screwed up.

                  Do you have a pic of the job???

                  Comment


                  • #10
                    I guess my question is,,, is there any heat treat to a grade 5 bolt?

                    Comment


                    • #11
                      yes the material is hardened before tool working on 5 and eight bolts. Heat will effect on all metals. whether it be good or bad.
                      Trailblazer 302g
                      coolmate4
                      hf-251d-1
                      super s-32p
                      you can never know enough

                      Comment


                      • #12
                        If these bolts are the ones I think they are---I wouldn't risk it.

                        Grade 8 bolts are a medium carbon, alloy steel that has been quenched and tempered---so heat will cause a change in the physical properties.

                        If these are the bolts that connect the chain to the forks or the mast--realize that the load on the forks is being held by these bolts---a failure of these bolts could be catastrophic---I would cough up the $$ to do it right and leave the liability on the manufacturer( I'm not much of risk taker).

                        Comment


                        • #13
                          Thanks

                          Thanks to all replies.

                          I have located these "bolt anchors" in Dallas (used) for $100.00 each and have ordered them based on all of your concerns.

                          I rather say "ouch" to the price vs "ouch" to an accident.

                          At least they aren't the $300.00 each Clark Lift wanted!

                          Thanks Again
                          John

                          Comment


                          • #14
                            Originally posted by JOHN1
                            Thanks to all replies.

                            I have located these "bolt anchors" in Dallas (used) for $100.00 each and have ordered them based on all of your concerns.

                            I rather say "ouch" to the price vs "ouch" to an accident.

                            At least they aren't the $300.00 each Clark Lift wanted!

                            Thanks Again
                            John
                            Bravo John

                            You did good!
                            Dennis


                            Thermal Arc 185-TSW
                            Millermatic Challenger 172
                            VictorO/A
                            Atlas Craftsman 12 by 24 Lathe
                            Esab PCM-875
                            Wholesale Tool Mill-Drill

                            Comment

                            Working...
                            X