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  1. #1
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    843

    Default Waldown c-0 tool post grinder quill dilemma

    Hi all,

    I have a Waldown c-0 grinder. It has two quills, one for external, the other for internal.

    The internal quill has a 0.003" larger OD than the external quill. The external quill (the smaller of the two) fits into the body clamp just fine as a nice sliding fit, but that extra 0.003" on the internal quill OD means that it does not fit in the clamp. The clamp has no 'expanding' capability so it really is damn difficult to get the quill in. I have burr filed all little dings off it so it is not stuck on a burr at all. The 0.003 diff is not wear and tear - both quills are near-perfect cylinders with almost no OD variation along their lengths - so this is how they were made.

    It seems the only way to get it in or out is to smack it in, or out, and that really seems the wrong thing to do.

    So, my dilemma is ... do I (attempt to) reduce the OD by a few thou to get it the same size as the external quill? Or smack it like it seems previous owners must have done in the past - which seems odd. I keep having this feeling like I've missed something important.

    Anybody with a C-0 care to measure the OD of their quills?

    Many thanks,

    Greg.

  2. #2
    Join Date
    Dec 2013
    Age
    56
    Posts
    1,416

    Default

    Have you checked the clamp itself if it's been smacked in previously? Maybe a hammer slip has done damage.

    If the clamp is fine and check's out fine, for 0.003inch or 0.0762mm of a millimeter for metric folks, after removing any little dings with a file like you have, I'd emery cloth it in the lathe evenly along the shaft, being careful to be even and measuring often.

    You may not even need that much off for it to fit in your clamp if it can be smacked in as you say, just have the clamp handy to keep trying it.
    I'd highly recommend not smacking it in, these are are precision bearings etc.

    It maybe one from another toolpost grinder that's been added after the original went missing.
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  3. #3
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    843

    Default

    Thanks Dave. Clamp looks good. I can see some burnishing inside it in the middle third so I might just be a bit narrower there.

    I had wondered whether it could be from another machine. Who knows. In the mean time, I figured I'd just better emery off a thou of so and see if that makes life easier. Good opportunity to tear the quill down as well and give it new grease etc.

    I forgot to mention there is also signs on the machine of the clamp attempting to be forced a little wider with maybe screwdrivers or something.

    So, best thing is to reduce it a tad it think. 👍 Agree.

  4. #4
    Join Date
    Dec 2013
    Age
    56
    Posts
    1,416

    Default

    Yeah agreed, take it down a little and keep trying it, at the most make it the same measurement as the other one.

    Setting it up in the lathe accurately to take off that amount would be more time and trouble than it's worth, emery cloth will do it fine.

    Just use some fine emery along it very evenly, or if needed step up to slightly courser, but end up finishing with fine to leave a nice finish. Be careful as it won't take much to go over and keep measuring on the way through to see where your at along it.

    Some people shouldn't own or use machines and tools using screwdrivers as pry bars etc, when it can be simply fixed like you are now.
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  5. #5
    Join Date
    Aug 2015
    Location
    Melbourne, Australia
    Posts
    843

    Default

    Thanks Dave. Emeried back 1.5 thou. All sweet. Thanks.

    Crisis over. 😀👍

  6. #6
    Join Date
    Dec 2013
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    56
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    Default

    Good to hear, and not a problem mate.
    Sometimes all we need is a little reassurance from someone tackling a job that we know we can do or fix.

    I am waiting for a PM reply from a member myself with an electric motor issue, I think I'm right but need that reassurance as I don't want to stuff it up.
    Using Tapatalk

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