7x12 metal gears

Discussion in 'Machine Modifications' started by zoltan, Jan 10, 2017.

  1. Jan 10, 2017 #1

    zoltan

    zoltan

    zoltan

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    If someone has changed both the 7x12 headstock gears hi-lo gears to the metal ones, would you mind telling me how much louder they are than the stock plastic gears?

    I'm replacing the spindle hi-lo gear with a metal one, and I'm trying to decide if I should replace the countershaft one with metal as well, or just leave it plastic.
     
  2. Jan 11, 2017 #2

    oldboy

    oldboy

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    They sounded a bit louder when first used, however once the settle in and get a couple of hours use they are not all that much louder. That's my take on them, same applies to using metal change gears.

    Barry.
     
  3. Jan 11, 2017 #3

    John S

    John S

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    Leave the countershaft one plastic as a fail safe. The countershaft is easier to change in the event of a snag but the spindle one is a lot harder.
     
  4. Jan 11, 2017 #4

    zoltan

    zoltan

    zoltan

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    If I change both spindle and countershaft to metal gears, what would break?
     
  5. Jan 11, 2017 #5

    John S

    John S

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    Probably burn the motor out or the speed board.
     
  6. Jan 31, 2017 #6

    zoltan

    zoltan

    zoltan

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    If you go with all metal, how often do you need to grease them?
     
  7. Feb 1, 2017 #7

    Wizard69

    Wizard69

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    Depends, niether the motors nor the controllers are known to be rugged (at least on the base machine). That doesn't mean a belt or something else wont give up mechanically. Jams often damage leadscrews or shear pins
     
  8. Feb 1, 2017 #8

    velocette

    velocette

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    Hi Zoltan
    Have you considered a belt drive using 4 rib "Poly Vee Belts" and dump the gear drive. Added a PDF File of the pulleys for a mini mill drive on my X2 Mill may be of some help.

    Eric

    View attachment zx2-drive-pulleys-maxi-ls.pdf
     
  9. Feb 2, 2017 #9

    zoltan

    zoltan

    zoltan

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    Once I got into my lathe rebuild I did start looking at something like that, except I need a lathe to make the pulleys...

    Hopefully I can make this happen after I get my lathe back together.
     
  10. Feb 3, 2017 #10

    Wizard69

    Wizard69

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    Poly V belts make for very nice mechanical drive solutions.
     
  11. Feb 8, 2017 #11

    velocette

    velocette

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  12. Feb 8, 2017 #12

    XD351

    XD351

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    I'm with Velocette on this one , i fitted metal gears to my C2 sieg along with a 3ph motor ,vfd ,vee pulleys and two things bug me - gear noise and belts that squeak .
    I will be re visiting this shortly and removing the gears altogether and changing over to poly vee belts .
    I may use a simple two speed pulley system between the motor and a jackshaft mounted where the original C2 motor was located so i have a high / low ratio option .
    I am thinking about a system that uses a driven pulley set on the jackshaft the are idling on roller bearings and drive to the jackshaft is via a sliding dog clutch that is splined to the jackshaft - a bit like how a motor bike gearbox works .
     

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