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Old 01-10-2017, 11:53 PM   #1
zoltan
 
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Default 7x12 metal gears

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.


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Old 01-11-2017, 02:23 AM   #2
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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.


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Old 01-11-2017, 01:45 PM   #3
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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.
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Old 01-11-2017, 01:52 PM   #4
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If I change both spindle and countershaft to metal gears, what would break?
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Old 01-11-2017, 08:14 PM   #5
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Probably burn the motor out or the speed board.
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Old 01-31-2017, 05:37 PM   #6
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If you go with all metal, how often do you need to grease them?
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Old 02-01-2017, 05:35 PM   #7
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Quote:
Originally Posted by zoltan View Post
If I change both spindle and countershaft to metal gears, what would break?

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
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Old 02-01-2017, 10:24 PM   #8
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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
Attached Files
File Type: pdf zx2-drive-pulleys-maxi-ls.pdf (222.2 KB, 114 views)
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Old 02-02-2017, 04:31 PM   #9
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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.
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Old 02-03-2017, 07:44 AM   #10
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Poly V belts make for very nice mechanical drive solutions.


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