Building a Bevel gear Gear Box

This board contains easy-to-do fixes on your new tanks from stock. This will hopefully help beginners to get the accuracy they want from their models.

Postby walter » Thu Jun 07, 2018 6:01 am

Lately I found out there are a number of very good bevel gear gear boxes available.
All using geared motors.
It is amazing how simplistic these gear boxes actually are against the modification of a standard gear box I did before.
Looking on the internet I found bevel gears with module 1 15 teeth and a 6mm bore.
Making them small enough to be viable for my project.
Also I found Merkle-Kroff geared motors that just stated 6-12 volt 30 rpm.
When I received them I soon realized I had a problem.
The motors rpm's where way to slow, the drive shaft was 1/4 inch and 10mm to short.
All the screw sizes had some strange American threads.
I had to re tap the mounting screw holes to be able to use screws I had.
But the overall quality was very good.
Here is how I went about it.
Last edited by walter on Thu Jun 07, 2018 1:53 pm, edited 1 time in total.

walter
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Postby walter » Thu Jun 07, 2018 6:04 am

The bevel gears
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Postby walter » Thu Jun 07, 2018 6:10 am

Geared motor all ready with new motor fixed.
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Postby walter » Thu Jun 07, 2018 6:19 am

This is the original motor.As can be seen the shaft is knurled.Also the new motor with a new pinion.
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Postby walter » Thu Jun 07, 2018 6:21 am

Gear housing and cover.
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Postby walter » Thu Jun 07, 2018 6:22 am

All gears removed.
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Postby walter » Thu Jun 07, 2018 6:24 am

All the gears.
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Postby walter » Thu Jun 07, 2018 6:26 am

Old and new main gear shaft. New shaft is 10mm longer.
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Postby walter » Thu Jun 07, 2018 6:29 am

Side plate. It also will be used to fix the gear box to the side wall of the tank.
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Postby walter » Thu Jun 07, 2018 6:30 am

Bottom plate.
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Postby walter » Thu Jun 07, 2018 6:34 am

Angle plate for mounting geared motor and also holding the flanged bearing for the main drive wheel.
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Postby walter » Thu Jun 07, 2018 6:35 am

Another view.
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Postby walter » Thu Jun 07, 2018 6:37 am

Track drive shaft and spacers.
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Postby walter » Thu Jun 07, 2018 6:39 am

Gear box assembled.
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Postby walter » Thu Jun 07, 2018 6:43 am

Another view.
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Postby walter » Thu Jun 07, 2018 6:45 am

From behind.
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Postby walter » Thu Jun 07, 2018 6:47 am

From underneath.
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Postby walter » Thu Jun 07, 2018 6:48 am

Another.
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Postby walter » Thu Jun 07, 2018 6:49 am

Finished pair.
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Postby walter » Thu Jun 07, 2018 6:50 am

Another.
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