Product Description
The Genuine Mainshaft Ball Bearing (570011/A) is a heavy-duty mechanical part designed specifically for the Unit Construction Engine (UCE) transmission system. As a 6006 C3 specification bearing, it is engineered with a “greater than normal” internal clearance (C3) to account for thermal expansion during long-distance or high-speed cruising. This ensures that even as engine temperatures rise, the bearing continues to rotate freely without binding or excessive heat generation. Manufactured to rigid OEM standards, this bearing provides the necessary support for the mainshaft, preventing gear slippage and ensuring quiet, efficient shifting.
Key Features:
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C3 High-Clearance Rating: Specially designed for high-temperature environments, allowing for thermal expansion without compromising rotational smoothness.
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Deep Groove Ball Design: Optimizes load distribution across the bearing raceway, effectively handling both radial and axial forces from the drivetrain.
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Hardened Chrome Steel: Constructed from premium, fatigue-resistant steel to ensure a long service life under heavy torque loads.
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Precision Tolerances: Built to exacting factory specifications to ensure perfect fitment on the mainshaft and within the gearbox casing.
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Genuine OEM Part: 100% original Royal Enfield spare, offering significantly better durability and vibration control than standard industrial bearings.
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Authenticity Guaranteed: Packaged in official Royal Enfield branding with a security hologram for verified quality.
Vehicle Compatibility:
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Royal Enfield Classic 350 / 500 (UCE Models)
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Royal Enfield Bullet 350 / 500 (UCE Models)
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Royal Enfield Thunderbird 350 / 500 / 350X / 500X
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Royal Enfield Bullet Electra 350











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