The Tamiya 42368 850 sealed ball bearings are designed to reduce friction and provide steadier rotation in drivetrain and gear locations. They are a practical upgrade for model builders aiming for improved mechanical smoothness.
They are commonly fitted to centre shafts on TRF420 and TA07MS cars and to various M-chassis gear spots. Replacing standard plastic or unshielded metal bearings with these rubber-sealed units typically improves alignment and rolling consistency.
The rubber seals can be opened to clean and relube the bearings, which simplifies service compared with permanently shielded types. Applying a small amount of low-friction oil after cleaning keeps the bearings turning freely.
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