Gallery, Projects and General > The Design Shop
Easy way to make a plastic gear!
John Hill:
--- Quote from: cidrontmg on August 22, 2010, 05:44:56 PM ---
Then, a plastic gear would be even softer than the ali gear, so running those together would grind the ali... But the ali gear might also wear in the wrong places, destroying the gear profile... Rats. :scratch:
--- End quote ---
No, I still think you would get the correct shape so now I need to make a wide plastic gear to match my ali one and try some grinding. :coffee:
cidrontmg:
--- Quote from: John Hill on August 22, 2010, 06:00:12 PM ---
--- Quote from: cidrontmg on August 22, 2010, 05:44:56 PM ---
Then, a plastic gear would be even softer than the ali gear, so running those together would grind the ali... But the ali gear might also wear in the wrong places, destroying the gear profile... Rats. :scratch:
--- End quote ---
No, I still think you would get the correct shape so now I need to make a wide plastic gear to match my ali one and try some grinding. :coffee:
--- End quote ---
Well, I certainly hope you´re right, and no better way to prove yes or no than trying. What I´m afraid of is, the plastic gear will be flexible, so it would tend to shy away exactly where it would need to grind the most material away (the highest pressure points). But a theory :smart: is worth nothing if practice proves it wrong :med:
:wave:
picclock:
Good idea.
This method would lend itself to making an Annulus (the one with the gear teeth pointing inward) in a planetary gear system. Possibly by heating the material and forming gear with a hot air gun.
Now if only I could figure out how to do it in steel .. .
picclock
John Hill:
--- Quote from: picclock on September 11, 2010, 10:43:06 AM ---Good idea.
This method would lend itself to making an Annulus (the one with the gear teeth pointing inward) in a planetary gear system. Possibly by heating the material and forming gear with a hot air gun.
Now if only I could figure out how to do it in steel .. .
picclock
--- End quote ---
I have not had a chance to get back this but I do think that if an Oxy/Acet flame was played on the edge of the gear blank as it rotates in the lathe it may be possible to heat it up enough to form against a steel gear. If the steel gear showed signs of getting red hot it could be cooled by running coolant over it or even running in a cooland trough. Just my ideas and I daresay hardly original.
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