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Thread: Delta 17-925 drill press problem

  1. #1
    Join Date
    Mar 2003
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    Upland CA
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    Delta 17-925 drill press problem

    I have a Delta 17-925 variable speed (Reeves type). I believe it is a Type 1 because it does not list type anywhere. I posted on this several years ago, but still have problems. It's maybe 15 years old.

    It is smooth going through the speed range until it gets above 2000 RPM, when it starts to shudder. At about 2500 or so, the belt gets stuck and stops suddenly. I then have to get out a strap wrench, wrap it around the chuck and turn it by hand back and forth until the belt pops free.

    Watching it run with the top open, it is easy to see the belt is nice and tight until it reaches that speed, at which time the belt starts wiggling back and forth, vibrating, and eventually the front pulley locks it up and the machine stops. It is always the front pulley that grabs the belt, and up until that time both pulleys seem to be fine.

    I can see the rear pulley open and close, but cannot tell if the front one moves. I have lubed them.

    I see a jam nut on top of the front pulley, which has about one thread showing above it. If I try to tighten it, would that help? It looks to me like the front pulley is too wide open, allowing the belt to bottom out?

    This model has a two speed lever. Could this have anything to do with the problem. I have never taken the time to figure out how that part works.

    I have already checked out the Parts.com pics.

    Ideas?
    Last edited by Rick Potter; 11-25-2019 at 11:30 PM.
    Rick Potter

    DIY journeyman,
    FWW wannabe.
    AKA Village Idiot.

  2. #2
    Join Date
    Mar 2003
    Location
    Upland CA
    Posts
    4,416
    In reply to my own question, I just found a YouTube vid by Joe Malovich showing how a variable speed pulley system works. I did not know the front pulley was opened manually by the speed lever without a spring.

    This makes me think perhaps I did not lube EVERYTHING. I will be taking all the sheet metal to get a better view of what is going on. Maybe I can then figure it out. I am wondering if the bottom of the front pulley is getting stuck half way through its travel. Don't know why that would make the belt wobble though.

    Still open to comments though.
    Rick Potter

    DIY journeyman,
    FWW wannabe.
    AKA Village Idiot.

  3. #3
    Join Date
    Mar 2019
    Location
    Greeley, CO
    Posts
    174
    Is the belt fresh or wood it make sense to replace it?

  4. #4
    Join Date
    Mar 2003
    Location
    Upland CA
    Posts
    4,416
    The belt is original, but is of a toothed design, and flexes easily. It also has no frayed edges.

    No expert, but looks ok to me.
    Rick Potter

    DIY journeyman,
    FWW wannabe.
    AKA Village Idiot.

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