Sprocket Help

Discussion in 'Frame Mounted Engines' started by jmacpi33, Jun 27, 2007.

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  1. jmacpi33

    jmacpi33 Guest

    What is the best way to enlarge the rear center hole of the drive sprocket? My rear hub is quite large on my new project and I need to "bore out" the mounting hole, by about 3/8 inch in diameter. And I need it to stay true. Thanks.

  2. 5-7HEAVEN

    5-7HEAVEN Guest

    :cool: the most accurate way, if you don't possess the skill and proper equipment, is your local, friendly machinist. :cool:
  3. iRide Customs

    iRide Customs Member

    I just use a large bi-metal hole saw. Just make it a little bigger that your hub so if you don't get it centered it won't matter. I use cheap steel front sprockets for bicycles. They cost a fraction of the price of the ones that have the holes arleady drilled. I just bought a 38t for $6 or $7 bucks off ebay.

  4. vintagebiker

    vintagebiker Guest

    Yeah, hole saws don't make true holes.
    Use a lathe or a milling machine.
    You can also do it on a drill press with a fly cutter type hole cutter.
    If you don't have access to these machines, go see a machine shop.