Manufactured by CHG Bearing, the 81148 is a precision Cylindrical Roller Thrust Bearings. Key dimensional parameters include a 240 mm bore diameter, a 300 mm outer diameter, and a mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
81148 - Cylindrical Roller Thrust Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 81148 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Cylindrical Roller Thrust Bearing |
| Design Type | Single Direction |
| Load Direction | Axial |
| Dimensions | |
| Bore Diameter (d) | 240 mm |
| Outer Diameter (D) | 300 mm |
| Minimum Chamfer Dimension rmin | 1.5 mm |
| Overall Height H | 45 mm |
| Inner-Ring Land Diameter (L1 / d1) | 243 mm |
| Outer-Ring Land Diameter (L2 / D1) | 297 mm |
| Performance | |
| Limiting Speed – Grease (r/min) | 430 r/min |
| Limiting Speed – Oil-air (r/min) | 560 r/min |
| Basic Static Axial Load Rating C0a (N) | 2205 N |
| Basic Dynamic Axial Load Rating Ca (N) | 427 N |
| Material | |
| Mass (kg) | 7.25 kg |
81148 300 mm 297 mm 240 mm 243 mm Frequently Asked Questions about 81148 Cylindrical Roller Thrust Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts 81148 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
To safeguard CHG Bearing 81148 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (240 mm x 300 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
For international ocean and air freight, CHG Bearing packs 81148 with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
To ensure optimum performance of CHG Bearing 81148 Cylindrical Roller Thrust Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 240 mm bore. For the 300 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
