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Thread: Lathe Belt Tension Adjustment Nut

  1. #1
    Supporting Member Paul Jones's Avatar
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    Lathe Belt Tension Adjustment Nut

    I added a way to keep a light tension on the lathe motor belt when driving the geared-head lathe spindle. The Lathe Belt Tension Adjustment Nut keeps the lathe motor mount from riding upwards during heavy cuts when the lathe motor is driving the spindle. The 12” swing geared-head lathe manufacturer built one side of the lathe motor mount with a hinge to allow for removing driving belt and lets the weight of the motor keep the belt under tension. Adding a ½-13 threaded rod, washer and adjustment nut allows the belt tension to be hand-tightened and also easy removal when needed. The adjustment nut and washer are made from 1.243” dia. 12L14 steel (diameter to fit the knurling) and 0.188” O-1 drill rod. The knurling is a 21 pitch cross-cut diagonal pattern.
    Attached Thumbnails Attached Thumbnails Lathe Belt Tension Adjustment Nut-lathe-belt-tension-adjustment-nut-details.jpg   Lathe Belt Tension Adjustment Nut-lathe-belt-tension-adjustment-nut-assembly.jpg   Lathe Belt Tension Adjustment Nut-lathe-belt-tension-adjustment-nut-parts.jpg   Lathe Belt Tension Adjustment Nut-lathe-belt-tension-adjustment-nut.jpg   Lathe Belt Tension Adjustment Nut-lathe-belt-tension-adjustment-reaming.jpg  


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  2. The Following 2 Users Say Thank You to Paul Jones For This Useful Post:

    Jon (May 31, 2015), kbalch (Jun 1, 2015)

  3. #2
    kbalch's Avatar
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    Thanks Paul! I've added your Lathe Belt Tension Adjustment Nut to our Lathe Accessories category, as well as to your builder page: Paul Jones' Homemade Tools. Your receipt:


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  4. #3
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    Great work Paul! That hand tightening feature is handy, and those well made knurls cool.

  5. The Following User Says Thank You to DIYer For This Useful Post:

    Paul Jones (Jun 1, 2015)

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    Supporting Member Paul Jones's Avatar
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    Thank you DIYer. I will probably make an improvement by replacing the flat washer with a ball-shaped washer for a better fit into the cast slot on the lower motor mount.



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