converted drill press to variable speed

Discussion in 'Horological Tools' started by brian fisher, Oct 17, 2019.

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  1. brian fisher

    brian fisher Registered User

    Jan 20, 2017
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    this is a little project i've been working on for a few months. i finally finished it up today.

    YHtPwl.jpg

    i inherited this press from my granddad back in the late '90s. it came to me with a 1/2hp induction motor and the skinniest belt drive system i've ever seen in my life.

    EDBPnC.jpg

    i picked up this 2hp treadmill motor and variable speed dc controller off ebay. i have about 120.00 invested in both.

    my next problem was what to do for pulleys. i liked the idea of using ribbed serpentine belts, so i decided to convert a couple of water pump pulleys.

    mbuSlA.jpg

    jVu07b.jpg

    jVu07b.jpg

    fnrbGp.jpg

    sOryiA.jpg

    bcBP5w.jpg

    here is the finished product.

    OGanxO.jpg


     
    Jim_Miller likes this.
  2. Jim_Miller

    Jim_Miller Registered User
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    Pretty hevi-duty, nice job
     
  3. Jim DuBois

    Jim DuBois Registered User
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    Jun 14, 2008
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    Nice work Brian!
     
  4. David S

    David S Registered User
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    Dec 18, 2011
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    Nice conversion Brian. How is the spindle / chuck runout?

    David
     
  5. brian fisher

    brian fisher Registered User

    Jan 20, 2017
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    Thank you all for the kind comments.

    as to runout, i disassembled the spindle, cleaned everything, and replaced the bearings. I have not measured it since I put it back together, but I assume it’s probably similar to any standard u.s. made machine from the ‘60’s.

    I like the fact that the chuck is attached with a taper so whenever I do get around to measuring, I can play around with the way the chuck is indexed on the shaft.
     
  6. measuretwice

    measuretwice New Member

    Jul 28, 2019
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    You've sure demonstrated making the most of a small machine - nice work!
     
  7. David S

    David S Registered User
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    Dec 18, 2011
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    Some tread mill motors have an external fan. Does yours have one internal?

    Also just noticed that you are using a Unimat lathe / mill. Nice to see those still being used.

    David
     
  8. brian fisher

    brian fisher Registered User

    Jan 20, 2017
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    it has an external fan. its plastic, but somehow it arrived in the mail undamaged. needless to say, i am using it for this application. you can actually see a side view if it in the video i posted above. it is the black thing on the bottom of the motor.

    that little lathe.... i just got it about 6 months ago. i literally have no idea how i have gotten along this far without it. it seems like i find a use for the silly thing almost every day. i am constantly buying accessories for it in ebay. i probably should have just invested in a sherline.....
     

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