Recent content by sunworksco

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  1. sunworksco

    Ceramic Shell Casting Steel

    I’m going to restore this bicycle to original. It’s a $4,000 item
  2. sunworksco

    Ceramic Shell Casting Steel

    On an 1896 Crescent No.1 racing bicycle?
  3. sunworksco

    Ceramic Shell Casting Steel

    1896 Crescent No.1
  4. sunworksco

    Ceramic Shell Casting Steel

    I can have 4 arms ceramic investment cast for around the same amount. Machining is very minimal on investment casting
  5. sunworksco

    Ceramic Shell Casting Steel

    They quoted $1,200 to machine 1 arm
  6. sunworksco

    Ceramic Shell Casting Steel

    The arm needs to match the existing arm. A machine shop in Berkeley, California, wanted several hundred dollars!
  7. sunworksco

    I’m having a difficult time finding a machinist that doesn’t want a fortune.

    I’m having a difficult time finding a machinist that doesn’t want a fortune.
  8. sunworksco

    Ceramic Shell Casting Steel

    Maury, Thanks! Please post the foundry names. I need to find someone to make the wax model, now.
  9. sunworksco

    Ceramic Shell Casting Steel

    It would be nice to find a reputable machinist to make it for me, that is in the USA.
  10. sunworksco

    Ceramic Shell Casting Steel

    It doesn’t matter how it’s made, as long as the arms are strong and can be nickel plated.
  11. sunworksco

    Ceramic Shell Casting Steel

    I’m in Alameda, California I’m not sure which method is best. To have the arm 3-D scanned is around $150.00USD. To have it 3-D printed is an unknown. All I know is that I need a steel arm reproduced.
  12. sunworksco

    Ceramic Shell Casting Steel

    I am wanting to learn the best method of having a pair of steel bicycle pedal arms cast, using ceramic shell investment casting method. I can have 3-D printed arms made into models that burn out for the lost wax casting process. What percentage of upsizing the 3-D printed model should be given...
  13. sunworksco

    using o-ring as a piston ring

    I have used Viton seals in full size thermal solar systems, for many years, with excellent results...
  14. sunworksco

    I just recieved my new South Bend 8K

    Thanks Mikbul
  15. sunworksco

    I just recieved my new South Bend 8K

    There has been good comments by owners of this lathe on The Practical Machinist Forum. I'm considering buying one now that the good word is out. I'm in California and shipping from Washington is not expensive. Old South Bend lathes are rare in good condition in California and are expensive when...
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