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Thread: Unimat SL Tailstock Lever Action Clamping Screws

  1. #1
    Paul Jones's Avatar
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    Paul Jones's Tools

    Unimat SL Tailstock Lever Action Clamping Screws

    My 3” swing Unimat SL lathe uses M6-1 cap head socket screws for locking and clamping the tailstock. I replaced the M6 cap head socket screws with my version of clamping screws with swing-out levers to apply more torque. The swing-out levers eliminate using Allen wrenches.

    The clamping screws were machined from 3/8” dia. 1018 CRS bar, the M6 threads cut with a tailstock mounted die, and the knurl is 21 pitch (whereby the 3/8” dia. was reduced to 0.364 before knurling). The swing out levers are 0.062” x 0.365” x 1.20” machined with 11/64” radii from 1/16” steel support rails salvaged from electronics rack panels. The slots in the clamping screw heads are 0.063” wide by 0.450” deep. The levers are retained with 3/32” roll pins shortened to fit.

    More information and photos about the improvements to the Unimat SL lathe can be viewed at Homemade Lathe Modifications .
    Attached Thumbnails Attached Thumbnails Unimat SL Tailstock Lever Action Clamping Screws-lever-action-clamp-screws-unimat-sl-tailstock.jpg   Unimat SL Tailstock Lever Action Clamping Screws-new-lever-action-clamp-screws-unimat-sl-tailstock.jpg   Unimat SL Tailstock Lever Action Clamping Screws-unimat-sl-lever-action-clamping-screws-headstock-tailstock.jpg   Unimat SL Tailstock Lever Action Clamping Screws-original-clamp-screws-unimat-sl-tailstock.jpg   Unimat SL Tailstock Lever Action Clamping Screws-unimat-sl-tailstock-lever-action-clamp-screws.jpg  

    Unimat SL Tailstock Lever Action Clamping Screws-layout-radius-ends-clamping-levers.jpg   Unimat SL Tailstock Lever Action Clamping Screws-cutting-slot-tailstock-clamping-screw.jpg   Unimat SL Tailstock Lever Action Clamping Screws-applying-21-pitch-knurl-0.364-dia-rod.jpg   Unimat SL Tailstock Lever Action Clamping Screws-drilling-cross-hole-tailstock-clamping-screw.jpg   Unimat SL Tailstock Lever Action Clamping Screws-fixture-holding-tailstock-clamping-screw-cutting-slot.jpg  

    Last edited by Paul Jones; 04-01-2016 at 10:27 PM.

  2. The Following 5 Users Say Thank You to Paul Jones For This Useful Post:

    Altair (12-20-2015), jjr2001 (09-01-2016), Jon (12-21-2015), kbalch (12-20-2015), PJs (12-21-2015)

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    Content Editor Altair's Avatar
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    Lever locks are one of the most useful lathe mods. Making short work of tailstock adjustments leads to an increased productivity.

    Al

  4. The Following User Says Thank You to Altair For This Useful Post:

    Paul Jones (12-20-2015)

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    Content Editor DIYer's Avatar
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    Thanks Paul! We've added your Tailstock Clamping Screws to our Lathe Accessories category, as well as to your builder page: Paul Jones' Homemade Tools. Your receipt:



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

    Paul Jones (12-22-2015)

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