51120
51100 & 51000 Series Single Direction Thrust Ball Bearings
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Part No.
Part No.
51120
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
0.97 kg
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.02mm to 0
Outside diameter
135 mm
Outside diameter tolerance
-0.025mm to 0
Width
25 mm
Width tolerance
+0.025mm to -0.3mm
Chamfer dimension
1 mm
Ball & Washer Dimensions
Housing washer inner diameter
102 mm
Shaft washer outer diameter
135 mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
18135 lbf
Axial static load rating
59625 lbf
Limiting speed
3.2 X 1000 rpm
Materials
Ring material
52100 Chrome Steel
Ball material
52100 Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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51120 Bearing Product Overview & Core Advantages
The 51120 thrust ball bearing is a metric single-direction thrust bearing engineered for applications requiring high-precision axial load support. Its design is optimized to accommodate heavy unidirectional axial loads while maintaining operational stability. Featuring a 52100 chrome steel construction for both rings and balls, this bearing delivers exceptional durability and wear resistance. It is characterized by its compact cross-section, high load capacity, and suitability for high-speed operation, making it an ideal choice for demanding industrial environments where reliability is paramount.
51120 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 51120 | Standard designation for a metric single-direction thrust ball bearing. |
| Seal Type: Open | The bearing is supplied without integral seals, allowing for higher limiting speeds and suitability for applications where external sealing is provided. |
51120 Bearing Structural Features & Performance Benefits
- High Axial Load Capacity: Designed specifically to handle significant unidirectional thrust loads, with a dynamic load rating of 18,135 lbf and a static load rating of 59,625 lbf.
- High-Speed Capability: The open design and precision-ground components contribute to a high limiting speed of 3,200 rpm, suitable for rapid rotation applications.
- Robust Material Construction: Manufactured from 52100 chrome steel for rings and balls, and a stainless steel cage, ensuring high strength, corrosion resistance, and long service life.
- Precision Tolerances: Features tight dimensional tolerances on the bore diameter and outside diameter for precise shaft and housing fits, enhancing overall system accuracy.
51120 Bearing Typical Application Areas
This thrust ball bearing is widely used in machinery and systems that experience high axial forces, including:
- Automotive Transmissions and steering systems
- Industrial Gearboxes and power transmission units
- Machine Tool Spindles and indexing heads
- Pumps and Compressors for thrust support
- Marine Propulsion Systems and crane hooks
