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  1. 22nd Jul 2018, 11:17 PM #1
    19brendan81
    19brendan81 is offline Golden Member
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    Default Shaft size for bearing press fit

    Hi All,

    i am am making a tool post spindle similar to the ones in the workshop practice series books. The bearings I am using are Japanese NsK ones with a 15.00 mm internal diameter. What size should I make the shaft for a light press fit? I have tried consulting the tables available online but got hopelessly lost. The spindle is being designed to hold an er25 collet.

    thanks in advance.

    brendan
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  2. 23rd Jul 2018, 12:09 AM #2
    pipeclay
    pipeclay is online now Most Valued Member
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    Default

    15.005/15.01
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  3. 23rd Jul 2018, 12:18 AM #3
    NedsHead
    NedsHead is offline Golden Member
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    I'm not 100% sure but I think a K6 fit is what you're after

    Shaft= +0.001 to +0.012

    Edit: removed hole tolerance
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  4. 23rd Jul 2018, 08:57 AM #4
    19brendan81
    19brendan81 is offline Golden Member
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    Thanks fellas. That’s quite a bit smaller than I had in my head so I’m glad I asked.

    brendan
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  5. 23rd Jul 2018, 08:25 PM #5
    .RC.
    .RC. is offline Pink 10EE owner
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    To be honest I would make it a hand push fit, then loctite.
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