Drill press variable pitch pulley - repairable?
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  1. #1
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    Drill press variable pitch pulley - repairable?

    On the school wood shop 15 inch, Craftsman, variable speed drill press.
    Mod: 351.229350
    Code: 200001

    The motor pulley assembly is spring loaded to maintain correct tension for the variable pitch spindle pulley.

    The upper and lower pulley have seized together and require a hammer to move.

    I have taken it off and will take it apart at the home shop.

    Any chance these clean up to where they function again?
    (part is no longer available)

    Thanks in advance
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
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    Tried being normal once, didn't take....I think it was a Tuesday.

  2. #2
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    Re: Drill press variable pitch pulley - repairable?

    I forgot the part numbers.

    Upper motor pulley: 16006
    Lower motor pulley: 16007

    Since the lower pulley is the one no longer available, I'll bet it's the damaged one when I take it apart tonight.
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  3. #3
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    Re: Drill press variable pitch pulley - repairable?

    Sounds like it's similar to a snowmobile clutch and drive setup. Probably all scored up. May need to make up a bushing or a sleeve to get a new bearing surface.
    Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.

  4. #4
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    Re: Drill press variable pitch pulley - repairable?

    Some new bushings and maybe a shaft should fix it if a clean and polish job doesn't. Had to go through that on my bandsaw. Not a big deal if you have a lathe handy.
    My name's not Jim....

  5. #5
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    Re: Drill press variable pitch pulley - repairable?

    Cool guys thanks, I'll post up the damage tomorrow
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  6. #6
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    Re: Drill press variable pitch pulley - repairable?

    I was able to pound it apart with a wood mallet.
    No bushing in it, just steel on steel.
    Looked like galling was the problem.
    Cleaned it, oiled it, spun them together to let them "seat" to each other and clean each other.

    Put back together with some wheel bearing grease, works perfectly again

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    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  7. #7
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    Re: Drill press variable pitch pulley - repairable?

    You didn't get out the mics or buy any fancy measuring tools? Not even a rant about poor fits from the factory?
    My name's not Jim....

  8. #8
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    Re: Drill press variable pitch pulley - repairable?

    Not even a rant about poor fits from the factory?
    Probably made in North America not in some offshore 'shop' :-)................Mike

  9. #9
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    Re: Drill press variable pitch pulley - repairable?

    Quote Originally Posted by Boostinjdm View Post
    You didn't get out the mics or buy any fancy measuring tools? Not even a rant about poor fits from the factory?
    Heck, before I owned all my fancy measuring tools, my calibrated eyeballometer and "that feels like the right amount of clearance" were all I used

    I bet you know exactly what I mean
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  10. #10
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    Re: Drill press variable pitch pulley - repairable?

    Not the same but some have used these for variable speed change on a drill press, it uses 2 belts and the movement of the pulley position changes the speed. It is mounted to a lever and to change speed you push the lever back and forth.
    https://www.ebay.com/itm/MTD-ORIGINA...sAAOSw43pcsLiK
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  11. #11
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    Re: Drill press variable pitch pulley - repairable?

    That's really interesting - I'd really like to see how that works
    Dave J.

    Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

    Airco 300 - Syncro 350
    Invertec v250-s
    Thermal Arc 161 and 300
    MM210
    Dialarc
    Tried being normal once, didn't take....I think it was a Tuesday.

  12. #12
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    Re: Drill press variable pitch pulley - repairable?

    John Deere used that on older garden tractors like a 214. Called it a varator.
    My name's not Jim....

  13. #13
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    Re: Drill press variable pitch pulley - repairable?

    Quote Originally Posted by acourtjester View Post
    Not the same but some have used these for variable speed change on a drill press, it uses 2 belts and the movement of the pulley position changes the speed. It is mounted to a lever and to change speed you push the lever back and forth.
    https://www.ebay.com/itm/MTD-ORIGINA...sAAOSw43pcsLiK
    Our potato packaging machines used to have those and I’ve used them on conveyors I’ve built. Simple and work really well.
    :

  14. #14
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    Re: Drill press variable pitch pulley - repairable?

    some explanation
    In this video you can see the center pulley changing to vary the speed
    DIY CNC Plasma table & CandCNC DTHC-IV MP 3100 Feather Touch option
    Hypertherm 65
    Everlast PowerTig 255 EXT
    Miler 180 Mig
    13" metal lathe
    Mill/ Drill
    ECT, ECT,

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