SB208-50 Kart Axle Bearing 50×80 mm — C4 Steel
OTT SB208-50 is the 50 mm kart rear-axle bearing for 80 mm bearing carriers, an insert-type bearing locked to the axle with set screws. It is engineered for real karting loads rather than unloaded free-spin: carbon-nitrided bearing-steel races and balls with low non-metallic inclusions for long fatigue life, and C4 internal clearance that leaves room for heat, axle flex, side load and high speed so the bearing does not tighten as it warms up. It comes pre-filled with kart-specific grease. Choose replaceable low-friction rubber seals (spare seals available separately) for the best protection against dirt, water and grease loss, or non-contact ZZ metal shields for minimum drag in clean, dry conditions.
- Bore (d)
- 50 mm
- Outer dia. (D)
- 80 mm
- Width
- 18 mm
- MOQ
- 10 pcs
- Lead time
- 30-45 days for standard orders
- Shipping
- FOB Ningbo / Shanghai
Technical data
Specifications
| Model | SB208-50 |
|---|---|
| Inner Diameter | 50 mm |
| Outer Diameter | 80 mm |
| Width | 18 mm |
| Internal Clearance | C4 |
| Heat Treatment | Carbon-nitrided races and balls |
| Locking | Set screws |
| Versions | Low-friction rubber seals (replaceable) / ZZ metal shields / Hybrid ceramic |
Applications
- Kart rear axle carriers (50 mm axle)
- Sprint and club racing
- Wet or dusty tracks (sealed version)
Fitment note: cross-references and vehicle applications are for identification. Send us the OE number, VIN or a sample and we will confirm the exact fitment before you order.
Key Features
- 01C4 clearance — will not tighten as it heats up
- 02Carbon-nitrided steel for shock and pitting resistance
- 03Replaceable low-friction rubber seals
- 04ZZ-shielded low-drag version available
Packaging
Available in OTT branded packaging or custom OEM packaging. Individual bearings are sealed in PE bags, packed in branded carton boxes, then palletized in wooden crates for export shipping.
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Application Guides
Request for quotation
Need SB208-50 in volume, or a variant of it?
Share an OE or competitor number, a drawing or target dimensions and your annual volume. Samples available for qualified projects.
- MOQ
- 10 pcs / model
- Lead time
- 30-45 days for standard orders
- Shipping
- FOB Ningbo / Shanghai