Tamiya gearboxes
05-10-2016, 06:47 AM
#26
You all do realize that Tamiya sells gearbox repair kits, that contain every gear, shaft, and bushing contained in one Sherman gearbox (which, excluding the final drive shaft, is identical in most every Tamiya gearbox (barring the Pershing, Leo2, and Type 10))?
Price from Tamiya is $27(US). Still not exactly cheap...but better than a new gearbox.
Price from Tamiya is $27(US). Still not exactly cheap...but better than a new gearbox.
05-10-2016, 09:27 AM
#28
You all do realize that Tamiya sells gearbox repair kits, that contain every gear, shaft, and bushing contained in one Sherman gearbox (which, excluding the final drive shaft, is identical in most every Tamiya gearbox (barring the Pershing, Leo2, and Type 10))?
Price from Tamiya is $27(US). Still not exactly cheap...but better than a new gearbox.
Price from Tamiya is $27(US). Still not exactly cheap...but better than a new gearbox.
05-10-2016, 02:32 PM
#29
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$27 plus S&H to replace just one or two stripped gears. And it seems the same ones tend to go - not like you need the rest of all those replacement parts.. And on one gearbox that blew, it was the final drive shaft that broke at that thin 4mm diameter spot. That part not included in the gearbox repair kit.
No, I really don't think gears are the way to go at all. Low efficiency, goopy mess, loud, heavy, a bit unreliable....
New mini-belt drive technology should work as a great alternative.
The loading data for a 6mm wide, 2mm pitch GT2 belt/pulley rig is way beyond anything needed to run a tank. At least I intend to test that.
No lube, no wear, no noise, no maintenance, lightweight, high efficiency....worth a try. And it takes up less space than a Tammy gearbox.
I didn't get good amps data on the comparative test cuz the Tammy box blew out right away. But I'm guessing the efficiency of the belt drive will lower the current draw overall.
Maybe longer battery life and maybe even able to use smaller motors.
No, I really don't think gears are the way to go at all. Low efficiency, goopy mess, loud, heavy, a bit unreliable....
New mini-belt drive technology should work as a great alternative.
The loading data for a 6mm wide, 2mm pitch GT2 belt/pulley rig is way beyond anything needed to run a tank. At least I intend to test that.
No lube, no wear, no noise, no maintenance, lightweight, high efficiency....worth a try. And it takes up less space than a Tammy gearbox.
I didn't get good amps data on the comparative test cuz the Tammy box blew out right away. But I'm guessing the efficiency of the belt drive will lower the current draw overall.
Maybe longer battery life and maybe even able to use smaller motors.
05-11-2016, 08:13 AM
#30
If you want to go for a belt drive solution Robert Tanzer from the world RC tank community has made some excellent belt drives. No need for multiple belts, just a single one with planetary gearbox.
http://youtu.be/y9g8JES1b6w
http://youtu.be/y9g8JES1b6w
05-11-2016, 12:41 PM
#31
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Hi Tom
I tried exactly that , a gear motor with a belted final drive. But with even a bit of added load (like climbing a hill) the drive would totally bog down. And I used a bigger motor tHan I'm using with the all belt Dr ive. I need to look more at the
Gear drive approach I guess.
In a couple weeks I'll be able to post results and pics.
Thanks
I tried exactly that , a gear motor with a belted final drive. But with even a bit of added load (like climbing a hill) the drive would totally bog down. And I used a bigger motor tHan I'm using with the all belt Dr ive. I need to look more at the
Gear drive approach I guess.
In a couple weeks I'll be able to post results and pics.
Thanks
