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    ![1:1 Conversion Kit for 19.2:1 Ratio Gearbox 1:1 Conversion Kit for 19.2:1 Ratio Gearbox]()  5105-0208-0019 1:1 Conversion Kit for 19.2:1 Ratio Gearbox$4.99
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    ![5103 Series Planetary Gearbox (3.7:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (3.7:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0003 3.7:1 RatioOUT OF STOCK$34.99
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    ![5103 Series Planetary Gearbox (5.2:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (5.2:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0005 5.2:1 RatioOUT OF STOCK$34.99
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    ![5103 Series Planetary Gearbox (13.7:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (13.7:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0014 13.7:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (19.2:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (19.2:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0019 19.2:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (26.9:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (26.9:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0027 26.9:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (50.9:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (50.9:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0051 50.9:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (71.2:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (71.2:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0071 71.2:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (99.5:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (99.5:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0100 99.5:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (139:1 Ratio, 24mm Length 8mm REX™ Shaft) 5103 Series Planetary Gearbox (139:1 Ratio, 24mm Length 8mm REX™ Shaft)]()  5103-0024-0139 139:1 Ratio$34.99
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    ![5103 Series Planetary Gearbox (188:1 Ratio, 24mm Length 8mm REX Shaft) 5103 Series Planetary Gearbox (188:1 Ratio, 24mm Length 8mm REX Shaft)]()  5103-0024-0188 188:1 Ratio$34.99
Planetary Gearbox Replacement Parts
Gearboxes
While every Yellow Jacket Planetary Gear Motor has our 12VDC Motor at its core, it’s the ratio of the Planetary Gearbox that gives each of them the speed and torque specs that makes it unique! As such, each of these gearboxes presents a different motor output option for their combination with the 12VDC motor.
While Yellow Jacket Planetary Gear Motors are battle-tested and ultra-reliable, these Gearboxes are great to have on-hand as an insurance policy in your pit. Or, maybe you’re mechanically enthused, and want to enjoy the scenic route when it comes to changing the ratio of your application or building your own gear motor!
 
     
     
     
     
     
     
     
     
     
    