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Thread: Hybrid arbor-pulley

  1. #1
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
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    8,621

    Default Hybrid arbor-pulley

    I have a 1/2 horsepower 1750 rpm motor on my main workbench out in the garage that is primarily used to "run in" small engines to loosen them up. I want an arbor to mount my different polishing buffs on. I don't like polishing in my lathe because it makes such a mess. I don't want to be constantly changing the pulley for a shaft mounted arbor because it gnarls up the motor shaft. LIGHTBUULB!!!--Make a threaded arbor that has the pulley permanently mounted to it.
    Brian Rupnow

  2. #2
    Join Date
    Jan 2003
    Location
    Deep in the Heart of Texas!
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    7,417

    Default

    I would not want a spinning pulley next to my buffs. I have a dedicated polish motor with the extended reach housing. Even it gets in the way sometimes. I can't imagine a spinning pulley would be very safe. But you're not me.

  3. #3
    Join Date
    Mar 2015
    Location
    Central Ms
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    861

    Default

    Get yourself another motor to mount your buffs on. It will be a lot cheaper than the doctor bill you will have after catching a finger under that V belt.
    “I know lots of people who are educated far beyond their intelligence”

    Lewis Grizzard

  4. #4
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    Jan 2003
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    Deep in the Heart of Texas!
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    Quote Originally Posted by Dave C View Post
    Get yourself another motor to mount your buffs on. It will be a lot cheaper than the doctor bill you will have after catching a finger under that V belt.
    Or against the edge of the pulley. I've got a scar on my right index finger from getting too close to the edge of a running pulley. (Setting the timing on a running car, not polishing.) I'm glad it wasn't under a belt. My hand would have gone one way and the finger another.

  5. #5

    Default

    If I'm understanding Brian's thoughts, the pulley would only be used for the breakin of new engines, at which time he wouldn't be buffing anything. And conversely, when he's buffing the motor isn't turning anything with the pulley, it's just a smooth free wheeling part next to the buff. Sounds okay to me. The new arbor is cantilevered out there a ways, but then he's an engineer and can assess that for himself.
    .
    "People will occasionally stumble over the truth, but most of the time they will pick themselves up and carry on" : Winston Churchill

  6. #6
    Join Date
    Mar 2008
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    Barrie, Ontario, Canada
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    Prior to building this thing I ran my buffs in the lathe at about 500 rpm. This should be a big improvement at 1750 rpm. I won't have buffs on there when I'm using the v-pulley to break in an engine. Conversely, I won't have the v-belt on there when I am buffing something. Think about it--For the last 8 years I've been spinning those buffs about 2" from the spinning jaws on the lathe chuck, with a half inch bolt and nut making my arbor. This was a nice little project, based 40% on need and 60% to give me somethin g to do this afternoon.


    Brian Rupnow

  7. #7
    Join Date
    May 2006
    Location
    north bay area
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    4,910

    Default

    Interesting old looking bench grinder in the rear of the first photo.

  8. #8
    Join Date
    Jan 2003
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    Suit yourself. The pulley is spinning when the motor runs. It doesn't have to have a belt on it to be dangerous..

  9. #9
    Join Date
    Mar 2008
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    Barrie, Ontario, Canada
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    Quote Originally Posted by sasquatch View Post
    Interesting old looking bench grinder in the rear of the first photo.
    Good eye, Sasquatch. My dad bought that from the blacksmith in Bancroft when he closed up shop when I was a kid. I have no idea how old it is, but it's probably older than I am.
    Brian Rupnow

  10. #10
    Join Date
    Apr 2017
    Location
    Kelowna BC
    Posts
    1,179

    Default

    I don't under stand wy you dont,
    A put a soft pad made from copper brass or alum, between setscrew and shaft.
    B slide a close fitting cover over pulley when not in use..

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