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  1. #1
    Join Date
    Nov 2012
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    Default How to remove pulley

    What do ya reckon is the easiest way to remove this pulley. It seems a bit stuck, and I don't want to break the motor casing.
    2hp motor and the pulley is 4" long x 4" diameter and has 2 grub screws (removed already) and a keyway.

    20201026_213957.jpg

  2. #2
    Join Date
    Sep 2012
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    York, North Yorkshire UK
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    Hi Phaser,

    A pin down the bore and a plate under the back. A pair of "G" clamps and a Bar across the pin. Heat the alloy pulley if wont start to move.

    Once you’ve got it moving then don't stop if its hot, if it cools it could grab !
    Best Regards:
    Baron J.

  3. #3
    Join Date
    Dec 2005
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    South Australia
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    Default

    If you don't have one borrow or rent a puller

  4. #4
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    Default

    Unfortunately not so easy with this one.
    The hole in the pulley for the motor shaft does not go all the way through (it's a blind hole).

  5. #5
    Join Date
    Mar 2011
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    Southern Flinders Ranges
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    Make a couple of U shaped wedges, put them between the motor and pulley (maybe put something in to protect the motor casting too) then squeeze them together with a clamp. Judicious use of heat if it doesn’t want to split under tension.

  6. #6
    Join Date
    Nov 2007
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    melbourne australia
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    Default

    Quote Originally Posted by phaser View Post
    The hole in the pulley for the motor shaft does not go all the way through (it's a blind hole).
    Given the outer pulley is buggered anyway, could you cut it off with a hacksaw? That might expose the hole in the pulley and allow the use of a puller. If it doesn't, you could drill the hole out and clean it up later on the lathe.
    Chris

  7. #7
    BobL is offline Member: Blue and white apron brigade
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    Default

    I agree with Jack, Pulleys are cheap and easily replaced or turned up.

  8. #8
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    Athelstone, SA 5076
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    Quote Originally Posted by jack620 View Post
    Given the outer pulley is buggered anyway, could you cut it off with a hacksaw? That might expose the hole in the pulley and allow the use of a puller. If it doesn't, you could drill the hole out and clean it up later on the lathe.
    Quote Originally Posted by BobL View Post
    I agree with Jack, Pulleys are cheap and easily replaced or turned up.
    ditto .....if you cant get hold of a puller

  9. #9
    Join Date
    Nov 2012
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    Mid North Coast NSW
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    Quote Originally Posted by jack620 View Post
    Given the outer pulley is buggered anyway, could you cut it off with a hacksaw? That might expose the hole in the pulley and allow the use of a puller. If it doesn't, you could drill the hole out and clean it up later on the lathe.

    I did wonder about doing it that way.
    also I don't really have a suitable puller. The ones I've got would prob break the pulley rim instead of move it, so I'd have to make up something to go behind it (was hoping to avoid that).
    Never know when someone has a simpler idea to yours.

  10. #10
    Join Date
    Sep 2008
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    Riddells Creek, Vic.
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    If you are not interested in saving the pulley you could try supporting the motor on a block of hardwood directly under the green painted boss and giving it a few hits longitudinally around the boss with a large cold chisel to expand the bore slightly, if hit in the right place and hard enough it might even crack open along the keyway.

  11. #11
    Join Date
    Dec 2014
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    melbourne
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    Drill the center and tap M8-M10 . put a screw in to push against the shaft. hopefully there will be enough thread length left.

    Robert

  12. #12
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by shedeng View Post
    Drill the center and tap M8-M10 . put a screw in to push against the shaft. hopefully there will be enough thread length left.
    Robert
    Worth a go, but it assumes the shaft is not snug or close to the bottom of the pulley hole. If it’s snug even a bottoming Tap won’t clear out enough thread to allow the bolt to pass through to press onto the top of the shaft. If there’s a drilled and tapped hole in the end of the shaft the tap could also damage that thread.

  13. #13
    Join Date
    Oct 2015
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    melbourne
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    If you can't tap to the bottom, drop a ball bearing in before the pusher bolt.

    If there's not enough depth for a thread (need 3 or 4 threads I believe) you'll have a hole for a puller

  14. #14
    Join Date
    Nov 2012
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    Quote Originally Posted by phaser View Post
    I did wonder about doing it that way.
    also I don't really have a suitable puller. The ones I've got would prob break the pulley rim instead of move it, so I'd have to make up something to go behind it (was hoping to avoid that).
    Never know when someone has a simpler idea to yours.
    Sorry, what i meant to say is simpler idea to mine (generalization).

    I do like the idea of drilling and tapping to see if a bolt will push it off, so that's what I'm doing now.
    If that doesn't work I can drill it out bigger to let my puller go through to the shaft.

    The thing is, I don't mind cutting off the broken small pulley end but I don't want to destroy it completely because if for some reason I can't complete a new pulley then I can put it back on and keep using what I've got.

  15. #15
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    So I cut off the damaged end of the pulley and tapped it M12, then used a long coach bolt (needing a long thread) and it came off easily.
    Trying to hold the pulley whilst tapping the thread was the hardest part.

    Oh and by the way ..... does anyone know the correct belt contact face angle for B section pulleys ?

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