Manufactured by CHG Bearing, the 51144 is a precision Thrust Ball Bearings. Key dimensional parameters include a 220 mm bore diameter, a 270 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.
51144 - Thrust Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 51144 |
| Brand | CHG® |
| Construction | Angular Contact Thrust Ball Bearing |
| Type | Double-Direction Angular Contact Thrust Ball Bearing |
| Characteristics | |
| Load Direction | Axial — Double Direction |
| Limiting Speed — Grease (r/min) | 1100 r/min |
| Limiting Speed — Oil (r/min) | 1500 r/min |
| Dimensions | |
| Bore Diameter (d) | 220 mm |
| Outer Diameter (D) | 270 mm |
| Contact Angle α (°) | N/A ° |
| Chamfer Dimension r (min.) | 3 mm |
| Dimension A | N/A mm |
| Bearing Height T | 144 mm |
| Dimension d1 | N/A mm |
| Dimension D12 | N/A mm |
| Dimension C | 72 mm |
| Dimension B | 36 mm |
| Chamfer Dimension r1 (min.) | 1 mm |
| Performance | |
| Basic Dynamic Axial Load Rating Ca (kN) | 360 kN |
| Basic Static Axial Load Rating C0a (kN) | 1390 kN |
| Material | |
| Mass (kg) | 41 kg |
51144 270 mm 220 mm 144 mm Frequently Asked Questions about 51144 Thrust Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Quality starts with raw material selection: CHG Bearing crafts 51144 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.
Yes, 100% of 51144 Thrust Ball Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
The CHG Bearing 51144 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
When fitting 51144 over a 220 mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
