OpenRC 1:10 RC Hybrid Central Differential Gear
thingiverse
The gear design is inspired by Steamerzone's "OpenRC almost all metal rugged driveline" (http://www.thingiverse.com/thing:162810). To create this hybrid central differential, print the gear ring in nylon such as Taulman 618 and the inner part in ABS. These parts slide together and can be secured with CA glue if needed; press fit was sufficient for me. Alternatively, use a dual extruder machine to print both materials simultaneously. This combination provides gears' strength and flexibility from nylon and central housing's stiffness from ABS.
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