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Shrink a bearing by welding to remove

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  • Shrink a bearing by welding to remove

    The wheel bearing on my customer's baby stroller for jogging failed and all of the ba11s came out leaving the outer race a heavy press fit in the hub. The bike store said that they would have to grind through the outer race to remove it, but they were too busy to deal with it.
    I used an ID puller to grip the ball race of the bearing because the bearing was up against a shoulder and I couldn't get behind it. I tried with the setup shown below but it wouldn't budge.

    1. ID bearing puller

    Click image for larger version  Name:	1. ID bearing puller.jpg Views:	1 Size:	78.2 KB ID:	701359
    Last edited by Don52; 06-30-2018, 02:42 PM.
    sigpic
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Lincoln LE 31 MP
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

  • #2
    Next I tried to use a more rigid backup to prevent the spokes from acting like springs, which reduced the impact load as shown below:

    2. Rigid backup

    Click image for larger version

Name:	2. Rigid backup.jpg
Views:	72
Size:	60.9 KB
ID:	701361
    sigpic
    Miller Thunderbolt
    Smith Oxyacetylene Torch
    Miller Dynasty 200DX
    Lincoln SP-250 MIG Welder
    Lincoln LE 31 MP
    Clausing/Coldchester 15" Lathe
    16" DuAll Saw
    15" Drill Press
    7" x 9" Swivel Head Horizontal Band Saw
    20 Ton Arbor Press
    Bridgeport

    Comment


    • #3
      This also didn't work, so I used a TIG torch with a small diameter conventional nozzle to melt the outer race in spots and allow it to shrink as the metal cooled off. I didn't actually add any metal. The TIG setup is shown below:

      3. TIG melting spots on outer race

      Click image for larger version

Name:	3. TIG melting spots on outer race.jpg
Views:	72
Size:	67.2 KB
ID:	701363
      sigpic
      Miller Thunderbolt
      Smith Oxyacetylene Torch
      Miller Dynasty 200DX
      Lincoln SP-250 MIG Welder
      Lincoln LE 31 MP
      Clausing/Coldchester 15" Lathe
      16" DuAll Saw
      15" Drill Press
      7" x 9" Swivel Head Horizontal Band Saw
      20 Ton Arbor Press
      Bridgeport

      Comment


      • #4
        I used the "Solid backup" shown in picture #2 and the race came right out as shown below:

        4. Race removed from hub

        Click image for larger version

Name:	4. Race removed from hub.jpg
Views:	72
Size:	92.6 KB
ID:	701365
        sigpic
        Miller Thunderbolt
        Smith Oxyacetylene Torch
        Miller Dynasty 200DX
        Lincoln SP-250 MIG Welder
        Lincoln LE 31 MP
        Clausing/Coldchester 15" Lathe
        16" DuAll Saw
        15" Drill Press
        7" x 9" Swivel Head Horizontal Band Saw
        20 Ton Arbor Press
        Bridgeport

        Comment


        • #5
          Here is what the inside of the outer race looked like with the TIG melted spots. The ID of the hub wasn't affected.

          5. TIG welded outer race
          • Have you ever used this or a similar method to remove a bearing or hub?
          Click image for larger version

Name:	5. TIG welded outer race.jpg
Views:	72
Size:	95.2 KB
ID:	701367
          sigpic
          Miller Thunderbolt
          Smith Oxyacetylene Torch
          Miller Dynasty 200DX
          Lincoln SP-250 MIG Welder
          Lincoln LE 31 MP
          Clausing/Coldchester 15" Lathe
          16" DuAll Saw
          15" Drill Press
          7" x 9" Swivel Head Horizontal Band Saw
          20 Ton Arbor Press
          Bridgeport

          Comment


          • #6
            Originally posted by Don52 View Post
            Here is what the inside of the outer race looked like with the TIG melted spots. The ID of the hub wasn't affected.

            5. TIG welded outer race
            • Have you ever used this or a similar method to remove a bearing or hub?
            Click image for larger version

Name:	5. TIG welded outer race.jpg
Views:	72
Size:	95.2 KB
ID:	701367
            No, but it's a good idea!

            Comment


            • #7
              A long time ago, they used to pull boiler tubes this way. The tube are installed by rolling them into the drum from inside the drum. Retubing consisted of cutting the tubes nearly flush then running a stinger down the inside to shrink the stub. Too many arc strikes and misses and the Navy prohibited this method.
              Blacksmith
              Stickmate LX AC/DC
              Big cheap (Chinese) Anvil
              Hand cranked coal forge
              Freon bottle propane forge
              HH 210 and bottle of C25

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              • #8
                Do it on occasion.
                Attached Files
                http://www.facebook.com/cary.urka.urkafarms

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