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Thread: seat tube cone

  1. #1
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    seat tube cone

    Looking for a quick and painless (ok, cheap) cone to hold a bb/st jig. Doesn't need to be super precise. Any suggestions?
    Thanks!

  2. #2
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    Ice cream cones work pretty well.

    Someone on here had success with some impact sockets.

    I also have a couple aluminum ones from my old jig that are tapped for M8 I'd probably be willing to send to you if ya pay shipping.

  3. #3
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    Plumb bobs, trailer hitches, cheapo shower and hose nozzles, clutch alignment tools...

  4. #4
    Randomhead
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    toolholders from a milling machine. NMTB 40 or 50 should work pretty well and might not be that much on ebay. You could go CAT or whatever the British standard is as well, but those are in more demand.

  5. #5
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    Bicycle Mini Bike Frame Jig Neck Alignment Cones BMX Racing Made in USA | eBay

    I searched for frame jig centering cones. Also the park tool 750 cone might work.
    cheers
    andy walker

  6. #6
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    Great suggestions! Thanks guys

  7. #7
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    I've found that the cone from a kids one-piece crankset (usually on 16" bikes and smaller) fits 26.8-27.2 mm ID seat tubes pretty well. I use the cones from a kids 20"/BMX one-piece crank for 34 mm ID head tubes as well.

    These parts are easily acquired for free or low cost if you have a Bike Co-op or low-cost used bike dealer in your city.

  8. #8
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    Lathe centres or live centres cost nothing these days bull nose centres can be had for little money too

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