The Tamiya 51760 46mm lightweight swing shafts are a direct-fit R/C scale drivetrain part intended for the TRF421X and TRF421 platforms. Supplied as two pcs, these swing shafts use ball bearings at the joint to reduce rotational friction and help preserve drive speed through directional changes.
Use cases include replacing worn universal shafts on a TRF421X (Item 42391) or upgrading the stock swing shafts on a standard TRF421 (Item 42384). When installed correctly they reduce drag at the universal joints and provide a cleaner transfer of torque through corners, which can be useful when tuning handling balance.
Installation notes: verify orientation and secure the retaining hardware to the manufacturer's torque range for your chassis, check bearing seating before final assembly, and inspect for play after a short test run. For maintenance, keep bearings clean and apply light lubricant sparingly to avoid attracting debris that increases wear.
Recommended complementary parts: when fitting these shafts to a TRF421 chassis (Item 42384) use Item 51762 Ball Bearing Set for Universal Shafts and Item 51764 TRF421X Gear Differential Joints (Ball Bearing Type) to ensure bearing compatibility and consistent drivetrain behavior.
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