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Old 02-06-2006, 04:10 PM   #1
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Default Pinion gear grinding

Hi guys

I have the tamiya TT-01 chasis and have added the hopup motor, ball bearings and propshaft, all is working well apart from the pinion gear.

The gear on the motor doesnt appear to sit as close as i would have expected to the large gear connected to the propshaft. When i accelerate it grinds a little to start with and i was driving it up a slight slope and it was having trouble getting up (the gears where slipping)

Surely this isnt normal and does anyone have any ideas how to fix it.
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Old 02-06-2006, 04:39 PM   #2
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It might be striped or your pinion might be loose try to check thos two things.
hope you figure it out
-Mark
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Old 02-07-2006, 02:55 PM   #3
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what do you mean by striped?

I did undo everything and take a look and screwed it back up as tight as i could, it seemed to help a little but it just doesnt seem right to me, it seems to slip to easily.
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Old 02-07-2006, 03:00 PM   #4
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What he means by stripped is that when the pinion gear was grinding against the spur gear make the teeth samller and possibly not there is some spots.
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Old 02-07-2006, 03:07 PM   #5
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ahh, i see.

They all look ok, they might be shaved a lil but it looks even.

From what it looks like the motor is either sitting just a tiny bit to low, if i lift it up slightly the teeth meet perfectly or it needs a slightly bigger pinion gear, i cant see a away of raising the motor and i dont know if they sell slghtly larger pinion gears or not
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Old 02-07-2006, 03:10 PM   #6
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you can basically get any gear that you want just make sure that it is the same pitch as ur spur gear.
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Old 02-07-2006, 03:40 PM   #7
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Darkness, sometimes when you are asking for advice on a mechanical problem it might help to post a pic of the part or area that you are concerned with, that way you are sure to get your problem fixed. There are tons of qualified racers and bashers willing to help anytime as you can see.
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Old 02-07-2006, 03:54 PM   #8
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i'll try and get a pic then, i think a fractionaly larger pinion gear on the motor would work, its just findin one
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