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Thread: lantern chuck for holding sprockets

  1. Oct 26, 2022, 07:41 PM #1
    Frank S
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    lantern chuck for holding sprockets

    I had a number of #35B-8 sprockets that I needed to shorten the length of the hub.
    Anyone who has ever tried to chuck a sprocket by any other means than on the hub of through the bore knows this is difficult at best especially if the tooth count is not divisible by 3 for chucking in a 3 jaw additionally tooth damage is a primary concern on the smaller pitch sprockets such as the 3/8" pitch #35.
    To solve my problem, I found that the sprocket fit nicely in the cap of a -16 37° JIC hydraulic fitting.
    lantern chuck for holding sprockets-img_20221026_120632lcf.jpg
    Selecting a Male adapter and cap I first tightened the cap on the fitting then chucked it in the lathe and turned the threads off the opposite end
    lantern chuck for holding sprockets-img_20221026_121409lcs.jpg
    Then reversed the assembly and bored a hole the diameter of the hub through the cap
    lantern chuck for holding sprockets-img_20221026_122341lcs.jpg
    Then I faced the 37° angle off the face of the fitting
    lantern chuck for holding sprockets-img_20221026_122702lcs2.jpg
    then tightened the cap on the now arbor with the sprocket inside an added bonus was the teeth of the sprocket are ground to a slight angle helping to align it for concentricy inside of the cap
    lantern chuck for holding sprockets-img_20221026_122739lcs.jpg
    From then on it was just a matter of facing off the amount of length I required facing the cap along with the sprocket to serve as a gage for the final length.
    lantern chuck for holding sprockets-img_20221026_123103lcs.jpg
    Not quite enough
    lantern chuck for holding sprockets-img_20221026_123156lcs.jpg
    no problem just re chuck and face a little more off
    lantern chuck for holding sprockets-img_20221026_132720lcs.jpg
    Rinse and repeat as many times as needed
    lantern chuck for holding sprockets-img_20221026_132833lcs.jpg

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  2. The Following 20 Users Say Thank You to Frank S For This Useful Post:

    albertq (Apr 12, 2024), baja (Oct 28, 2022), bruce.desertrat (Oct 27, 2022), Cascao (Oct 28, 2022), drivermark (Oct 27, 2022), EclecticNeophyte (Oct 27, 2022), Jon (Oct 26, 2022), kboy0076 (Jan 5, 2024), KustomsbyKent (Oct 27, 2022), mr mikey (Oct 27, 2022), mwmkravchenko (Oct 29, 2022), Philip Davies (Nov 1, 2022), phred (Oct 27, 2022), rdarrylb (Oct 31, 2022), rebuilder1954 (Oct 28, 2022), rlm98253 (Oct 27, 2022), that_other_guy (Oct 31, 2022), thevillageinn (Oct 29, 2022), Toolmaker51 (Oct 28, 2022), uv8452 (Oct 28, 2022)
  3. Oct 27, 2022, 12:53 AM #2
    DIYer
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    Thanks Frank S! We've added your Lantern Chuck to our Workholding category,
    as well as to your builder page: Frank S's Homemade Tools. Your receipt:




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  4. Oct 28, 2022, 01:40 PM #3
    Jon
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    Congratulations Frank S - your Lantern Chuck is the Homemade Tool of the Week!

    Clever use of a hydraulic fitting, and it looks like it worked perfectly.

    Some more good builds from this week:

    Lathe Spider by thehomeengineer
    Pipe Strap Jig by orioncons36
    Triangle Folding Fixture by Occasional machinist
    Dust Collector Impeller by Didpoolhall
    Carbide Blade Cleaning Method by Make Things
    Broken Tap Removal Method by Improvised DIY
    Scribing Tool by Guy Marsden
    Block Plane by e_m_maker
    Machinist's Jacks by Hill Top Machine Works
    Tailstock Collet Chuck by neilg4dbn
    Milling Machine by Wasteland Workshop
    Fastener Identifier Board by Make Things
    Offset Tongs by Philip Davies


    Frank S - you'll be receiving a $100 online gift card, in your choice of Amazon, PayPal, or bitcoin. Please PM me your current email address and gift card choice and I'll get it sent over right away.

    This is your 12th Homemade Tool of the Week. Here are all of your Homemade Tool of the Week winning tools. Congrats again


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  5. Oct 29, 2022, 09:57 AM #4
    mwmkravchenko
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    Frank, this one I will remember. What a difficult thing to grab by any other means! Now that's real engineering. Simple and cheap!
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    Frank S (Oct 30, 2022)
  7. Oct 30, 2022, 07:18 AM #5
    Frank S
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    Quote Originally Posted by mwmkravchenko View Post
    Frank, this one I will remember. What a difficult thing to grab by any other means! Now that's real engineering. Simple and cheap!
    Pretty much the same idea as holding a countersunk screw by the head to shorten them, which is how I came up with the idea. I was all set to machine something from scratch when I thought of repurposing a hydraulic fitting
    Never try to tell me it can't be done
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    mwmkravchenko (Oct 30, 2022)
  9. Oct 30, 2022, 10:31 AM #6
    mwmkravchenko
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    Quote Originally Posted by Frank S View Post
    Pretty much the same idea as holding a countersunk screw by the head to shorten them, which is how I came up with the idea. I was all set to machine something from scratch when I thought of repurposing a hydraulic fitting
    Definitely a good idea. Even here those fittings are not crazy expensive. All depends on what you have on hand. I admire the get it done, and done well.



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  10. The Following User Says Thank You to mwmkravchenko For This Useful Post:

    Frank S (Oct 30, 2022)
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