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  • Motor removing tool

    I've read in some posts that there is a tool for removing motors (national) that are hard to get off gearboxes that doesn't bend shafts. What does it look like, how does it work, who makes it?

    Thanks.

  • #2
    Re: Motor removing tool

    The tool is just a jig that with allthread, allows you to seperate the motor from the gearbox.

    But, as carefully as you can bwecause you can still bend the rotor shaft.

    Not sure who designed it but Stahl's Seventys sells it. Worth the money, and once you get it apart and rebuilt, antisiez that shaft before you reinstall.
    Pinspotters do not break down when they are not running!

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    • #3
      Re: Motor removing tool

      You can seperate the head from the gearbox by removing the bolts and rotate the motor head by tapping the head a few degrees around. Move it enough to cover the gearbox bolt holes. Then screw the bolts up through the bottom of the gearbox holes and PUSH the head up. It's like a built in wheel puller. You can only use two bolts to to this, because you can't get at the back bolt. Use a large screw driver in that area to keep the head even as it comes out. Use plenty of PB Blaster or WD#40. It's a good thing.
      "Gun control is the policy of tyrants"
      Rep. Rob Bishop (R-UT)

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      • #4
        Re: Motor removing tool

        AMFpinboy is correct, you can do this. However unless you are in the business of regular maintenance, get the jig.

        If you get one that is rusted then the bolts are not long enough. Once you have pulled and cleaned and reinstalled with anti-sieze on the couplers, then it is cake. Get a motor head halfway out and it gets stuck, not to mention you are by yourself. You compromise the shaft if you leave it hanging.

        I made a jig to bolt my Nat BE Gearboxes to so I could put the jig in the vise and the motor head would face upright while I removed it.
        Pinspotters do not break down when they are not running!

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        • #5
          Re: Motor removing tool

          I think we might have one of those, not sure what it looks like. Can someone post a pic?

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          • #6
            Re: Motor removing tool

            You can also tap the holes on the motor flange. I believe it would be 7/16-14. That way you can use all three of the holes. I use a 6" scale and measure so I don't exceed 1/32nd. of an inch at any givin point to prevent bending the shaft.
            Yeah but, We've always done it that way.

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            • #7
              Re: Motor removing tool

              Brunsamf: are those hole on the motor flange ready to be tapped out as they are or chased with a different sized bit?

              How and where do you place the 6" scale; sometimes a 32nd is hard to see especially on a rule.
              Pinspotters do not break down when they are not running!

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              • #8
                Re: Motor removing tool

                Mike; I believe the clearance hole on the flange is 13/32 so you won't get 75% thread but it is enough so the bolt won't strip the flange. I guess you don't have to use a scale but a machinist chrome clad scale is easy to read because it is not shiny like a cheap scale is. A Starret C309R is the one I used when I was in the machine shop. Just pick three different spots a third of the way around the motor to measure from if you wish to do it that way. Bill
                Yeah but, We've always done it that way.

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