Results 1 to 10 of 10

Thread: Cole Drill revisited

Hybrid View

  1. #1
    Join Date
    Aug 2006
    Location
    West Sussex UK
    Posts
    221

    Default Cole Drill revisited

    Every so often I come across references to this tool. For the sort of work I do it would make a lot of sense. However the chances of me running across such a thing in the UK are miniscule so given the simple nature of the thing I've decided to have a bash at making my own. I think I've gathered most of the information I need from looking at photos but I'd like to sense check a few things with those who may have used the real thing.

    What I'd like to know:-

    How long is the hollow bolt that the drill spindle runs thru?

    Is there a thrust bearing used? And if so where is it, top or bottom of
    the hollow bolt?


    So far I am planning to use a M16x1.5mm bolt drilled to take the spindle and an off the shelf thrust bearing at the bottom of the bolt running against a flange on the drill spindle.

    For the ratchet drive best I can come up with at the moment is to use a 1/2" drive ratchet from a socket set which kind of leads to the logic of turning the drill spindle from an extension bar from a 1/2" set.

    If I can find some cast iron chunks I could use this for the body of the drill head and base but failing that there should be no problem using cut offs of mild steel, say 3"X2" ?

    Once again all information, ideas and suggestions gratefully received. If I get started with this I promise to take photos!

    Thanks

    Alan

  2. #2
    Join Date
    Mar 2008
    Location
    Vermont
    Posts
    739

    Default

    The hollow bolt is about two inches long. The spindle is stepped, with a smaller diameter through the hollow bolt, and the thrust bearing goes between the bottom of the hollow bolt and the wider portion of the spindle. I am guessing that this would be stronger than a flange. It's a simple ball thrust bearing similar to those found in scissor jacks and the like.

    If you need, I can take pictures and get proper dimensions later.

  3. #3
    Join Date
    Mar 2008
    Location
    Vermont
    Posts
    739

    Default

    Here's a quick shot of the spindle and screw assembly. The spindle below the bearing is 1 inch diameter, and about 1/2 inch where it goes through the screw.

    The ratchet is a simple spring-loaded plunger in the handle. One way only, no reverse. The ratchet wheel is threaded to the top of the spindle with a little shoulder, so when you turn the handle it simply tightens down on the shoulder.[IMG][/IMG]

  4. #4
    Join Date
    Aug 2006
    Location
    West Sussex UK
    Posts
    221

    Default

    Thanks Bruto, that's brilliant. Exactly the information I required. Very kind of you to take the trouble to do that.

    On a different tack, Vermont is one of the few states I've visited. My brother-in-law had a scholarship at Harvard back in the late eighties. My wife and I paid a brief visit one February which co-incided with one of the heaviest snowfalls that area had seen for a long time. Nevertheless we managed to get about OK and Vermont we decided was our favourite as it was most like home.

    Thanks for your help once again.

    Alan

  5. #5
    Join Date
    Aug 2006
    Posts
    363

    Default

    I purchased one from the US through Ebay, shipping was over $100 but it was
    well worth it they are a great tool.
    Previous to this purchase I intended to make one and have good diagrams
    with measurments etc.
    If you would like copies of these send your postal address via a personal message and I will mail them to you.

  6. #6
    Join Date
    Aug 2006
    Location
    West Sussex UK
    Posts
    221

    Default

    RW, that is very kind of you. My address is on it's way.
    Thank you

    Alan

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •