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  1. #1
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    Default Can The Spoke Section Diameter Of A Drill Press Spindle Be Reduced By 0.2mm

    Hi

    I needed to purchase a new Spindle for my Waldown Drill Press that I am restoring. I purchased a replacement Spindle from Brobo however it turns out that my Waldown was one of the first 8SN series ever made. The first 8SN series had a spindle with a 16.3mm diameter spoke section however later version came with a 16.5mm. Waldown/Brobo do not have any 16.3mm spindles.

    So my question is how difficult would it be to remove 0.2mm from the spindle on a metal lathe? Without compromising the concentric nature of the spindle.

    I assume the spindle would be hardened steel.

    Now I can buy a 1044110 Upper Sleeve $88.00+GST from Brobo that will fit the new 16.5 spindle. For simplicity should I just buy a new Upper Sleeve or is reducing the size of the spoke section by 0.2mm doable?

    Here is a photo of what I mean.

    IMG_4747.jpgIMG_4746.jpg

  2. #2
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    Default

    Is there still a center in the end of the shaft?
    Anything is possible though you might need to grind it. Whats a new one cost?

    Stuart

  3. #3
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    Default

    Are the other dimensions compatible .
    Have they increased I'd of the spline.( Minor Diameter).

  4. #4
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    Default

    Are you sure it will fit if the outside diameter is reduced? Have you checked the other dimensions, spline (spoke) depth and width etc?

    I think you will need to have it done on a cylindrical grinder. Is the a tapered hole in each end of the shaft to mount it between centres?
    ..Live a Quiet Life & Work with your Hands

  5. #5
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    You wouldn't want a tapered hole at each end.

  6. #6
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    Default

    Aren't the holes for centres countersunk? Trying to give a non-metal worker a layman's description.
    ..Live a Quiet Life & Work with your Hands

  7. #7
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    Depends on your financial situation and you have to be absolutely sure your current new spindle with spline will fit the old splined bush.

    You may find the 16.5mm splines have a larger minor diameter then the old 16.3mm spline..

    The risk is the price of a new spindle verses $88 for the new part....
    Light red, the colour of choice for the discerning man.

  8. #8
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    Default

    Do you think its tough or hardened? I wouldn't attempt to turn it, for a factor of 0.1mm per side. I'd grind it, but I can do that in-house.

    Splines normally locate on the O.D of the male. This will have a mass of clearance being a sliding spline, but it should be kept true.

    Run a file over the end of one spline tooth, and see if it's even turnable.

    Regards Phil.

  9. #9
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    Default

    Quote Originally Posted by pipeclay View Post
    Are the other dimensions compatible.
    Yes

    Quote Originally Posted by Stustoys View Post
    Is there still a center in the end of the shaft?
    Yes

    The spindle cost $300 a new upper sleeve would only cost $100 more. It sounds that it would be safer to simple buy a new upper sleeve. Since the spindle is hardened rock hard.

    Thanks for everyones input. But I think it will be easier and safer to pay up for a new upper sleeve.

  10. #10
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    Quote Originally Posted by thumbsucker View Post
    Since the spindle is hardened rock hard.
    Unless the splines look ground, post heat treat. I'd bet they are nitrided. Taking 0.2mm off the skin will be eating into that hardness. I cant see a long skinny part like that being heat treated any other way

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