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Old 02-03-2009, 07:20 AM   #1
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Default Custom gears?

Does anyone know a machine shop to make gears out of metal?

-Ant.
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Old 02-03-2009, 10:48 AM   #2
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You trying to do this for the IGT?
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Old 02-03-2009, 11:13 AM   #3
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Steel, aluminium, titanium, just some things we have tried....

The steel gears you can buy/order at a specialized hardware store per meter, just use some good machinery to dril the hole and make the right thread.
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Old 02-03-2009, 11:30 AM   #4
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You trying to do this for the IGT?
I know not what you speak of. hehe tired of stripping gears for no reason.
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Steel, aluminium, titanium, just some things we have tried....

The steel gears you can buy/order at a specialized hardware store per meter, just use some good machinery to dril the hole and make the right thread.
thanks...but I dont need the clutch bell, I need trans gears.
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Old 02-03-2009, 12:22 PM   #5
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You need to look where there might be flexing involved, getting steal gears just band aids the problem. Gears, for the most part don't just strip for no reason. Either there's too much heat, felxing, and or miss-alignment. You should try and locate the source of the issue.
The Mugen MTX4R's are notorious for stripping gears if things aren't perfect. Alignment, friction, bearings, tightness of ALL screws on the bulkhead, braces.....ect. Take your time and go through the car and try and find the stress points when the car shifts.
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Old 02-03-2009, 12:28 PM   #6
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Originally Posted by Baedarlboo View Post
You need to look where there might be flexing involved, getting steal gears just band aids the problem. Gears, for the most part don't just strip for no reason. Either there's too much heat, felxing, and or miss-alignment. You should try and locate the source of the issue.
The Mugen MTX4R's are notorious for stripping gears if things aren't perfect. Alignment, friction, bearings, tightness of ALL screws on the bulkhead, braces.....ect. Take your time and go through the car and try and find the stress points when the car shifts.
That is all very true when you are using a car for it's intended application but sometimes people go out of the box and do something different.

A few potential reasons for wanting custom gears:

1. A car with more power than it was designed for, such as older TC's with modern motors (TC3 diffs come to mind).

2. Speed run cars. I seem to remember RCCA getting Robinson to make them gears and pulleys for a speed run car.

3. Four stroke conversions. You need much higher gearing than most cars allow.
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Old 02-03-2009, 12:36 PM   #7
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That is all very true when you are using a car for it's intended application but sometimes people go out of the box and do something different.

A few potential reasons for wanting custom gears:

1. A car with more power than it was designed for, such as older TC's with modern motors (TC3 diffs come to mind).

2. Speed run cars. I seem to remember RCCA getting Robinson to make them gears and pulleys for a speed run car.

3. Four stroke conversions. You need much higher gearing than most cars allow.
He's running in a spec class, car is box stock other then handling tuning. It's a RTR, with the radio switched out to a Spektrum.
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Old 02-03-2009, 12:52 PM   #8
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The gears are meshed tightly like Lee's and he's not having any problems. I stripped one 2nd gear out after about 3-4 tanks while another stripped after 2 laps. The engine or trans didn't move a millimeter. So I am not sure the cause of it. I would rather have metal gears period. If if it is a mm off it wont shift and snap all the teeth off.

I can't find a machine shop to make something this small though.

-Ant.
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Old 02-03-2009, 01:12 PM   #9
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You should check your 2 speed.
If there is a large gap between the clutch shoes and housing, this causes an abrupt gear shift and could cause issues. I don't know how the IGT's 2 speed system is setup, but you should make this gap as small as possible.
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Old 02-03-2009, 01:18 PM   #10
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You should check your 2 speed.
If there is a large gap between the clutch shoes and housing, this causes an abrupt gear shift and could cause issues. I don't know how the IGT's 2 speed system is setup, but you should make this gap as small as possible.
hmmm, good point. I will check it when I get home. I know the set screw is nice and tight and i'm 99.9% sure it is on the correct way.

-Ant.
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Old 02-03-2009, 01:19 PM   #11
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hmmm, good point. I will check it when I get home. I know the set screw is nice and tight and i'm 99.9% sure it is on the correct way.

-Ant.
In all honesty, you should ask Lee how he got his to stop stripping, as if I remember correctly, he also had this issue not too long ago.
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Old 02-03-2009, 01:33 PM   #12
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In all honesty, you should ask Lee how he got his to stop stripping, as if I remember correctly, he also had this issue not too long ago.
I checked his after I broke my 2nd, 2nd gear that day and called it quits and his was just as tight.

-Ant.
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Old 02-03-2009, 02:04 PM   #13
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I checked his after I broke my 2nd, 2nd gear that day and called it quits and his was just as tight.

-Ant.
I will look at your gear mesh and try to find out why you are having an issue. When I had a problem I found 3 things that could have been the problem. I corrected all 3 and I have not had a problem again so I am not sure which of the 3 was the root cause or if all 3 together were the cause.

I found;
1) gear mesh was not deep enough
2) screws holding the 2speed center section were not tight enough
3) sloppy clutch bell bearing - the one on the extreme end of the engine - I replace the bearing.

In your case I think it is #3 because of the issue you had before with clearance. Remember your clutch bell was locking up when the screw on the end of the shaft was tightened. I suggest remove the engine from the car, completely disassemble the clutch and remove the flywheel. My car has spacers between the engine and the cone washer - you may have too many in there. Re-assemble and your clutch should not bind up after the screw in the end of the shaft is completely tightened.

If that doesn't work - call me!

Lee
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