SB208-50 Hybrid Ceramic Kart Axle Bearing 50×80 mm
Performance version of the OTT SB208-50 axle bearing. Steel balls are replaced with premium Japanese-made silicon nitride (Si₃N₄) ceramic balls — light, very hard, heat- and corrosion-resistant — running on carbon-nitrided bearing-steel races. The lighter rolling elements cut friction and heat build-up at the rear axle. Like the steel version it has C4 internal clearance for heat, axle flex and side load, kart-specific grease and replaceable low-friction rubber seals (spare seals available separately).
- Bore (d)
- 50 mm
- Outer dia. (D)
- 80 mm
- MOQ
- 10 pcs
- Lead time
- 30-45 days for standard orders
- Shipping
- FOB Ningbo / Shanghai
Technical data
Specifications
| Model | SB208-50 Hybrid Ceramic |
|---|---|
| Inner Diameter | 50 mm |
| Outer Diameter | 80 mm |
| Ball Material | Si₃N₄ silicon nitride ceramic (made in Japan) |
| Race Material | Carbon-nitrided bearing steel |
| Internal Clearance | C4 |
| Seal Type | Replaceable low-friction rubber seals |
Applications
- Competition rear axles
- Sprint racing
- Endurance kart racing
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
- 01Japanese-made Si₃N₄ ceramic balls
- 02Less friction and heat build-up than all-steel
- 03C4 clearance for karting loads
- 04Replaceable low-friction seals
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.
Other versions
Kart rear axle insert bearings — by axle size and version
Choose by axle diameter (30 / 40 / 50 mm) and carrier size, then by closure (ZZ or 2RS) and steel or hybrid ceramic. All with C4 clearance and set-screw locking. Not sure which one fits? See where each bearing goes in a kart.
SB208-50
SB208-50 Kart Axle Bearing 50×80 mm — C4 Steel
- Size
- 50 × 80 × 18 mm
- Fits
- Kart rear axle carriers (50 mm axle)
SB208-210-2RS-C4 Hybrid
SB208-50 2RS C4 Hybrid Ceramic Kart Axle Bearing
- Size
- 50 × 80 × 18 mm
- Fits
- 50 mm kart axle
SB210-50 ZZ C4
SB210-50 Kart Axle Bearing 50×90×20 mm — C4 ZZ
- Size
- 50 × 90 × 20 mm
- Fits
- Kart rear axle carriers with 90 mm housing
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Application Guides
Request for quotation
Need SB208-50 Hybrid Ceramic 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