51309
51300 & 51400 Series Heavy Duty Thrust Ball Bearings
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Part No.
Part No.
51309
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
0.66 kg
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.02mm to 0
Width
28 mm
Width tolerance
+0.02mm to -0.25mm
Chamfer dimension
1 mm
Ball & Washer Dimensions
Housing washer inner diameter
47 mm
Shaft washer outer diameter
85 mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
17122 lbf
Axial static load rating
34425 lbf
Limiting speed
4 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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51309 Bearing Product Overview & Core Advantages
The 51309 is a metric thrust ball bearing engineered for high-precision axial load applications. This bearing is specifically designed to accommodate unidirectional thrust loads with exceptional reliability. Manufactured from 52100 Chrome Steel for both rings and balls, it delivers superior durability and wear resistance. Its compact design and precise dimensional tolerances make it ideal for applications requiring accurate axial positioning and smooth operation under heavy thrust forces.
51309 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 51309 | Basic Model Number | Indicates a metric series thrust ball bearing with a 45mm bore and 85mm outside diameter. |
| (Open) | Seal Type | No seals or shields, allowing for high-speed operation and easy re-lubrication. Requires a clean operating environment. |
51309 Bearing Structural Features & Performance Benefits
- High Load Capacity: Constructed with 52100 Chrome Steel components, this bearing offers a high axial dynamic load rating of 17,122 lbf and an axial static load rating of 34,425 lbf, making it robust for demanding thrust applications.
- Precision Engineering: Features tight dimensional tolerances on the bore diameter and outside diameter for reliable fit and precise axial positioning in assemblies.
- High-Speed Capability: The open design and stainless steel cage contribute to a limiting speed of 4,000 rpm, suitable for various high-speed machinery.
- Durability & Compliance: The use of high-grade materials ensures long service life. The bearing is ROHS and REACH compliant, meeting modern environmental standards.
51309 Bearing Typical Application Areas
The 51309 thrust ball bearing is ideally suited for machinery and equipment that experience significant axial loads, including:
- Automotive Steering Systems
- Industrial Pumps and Compressors
- Machine Tool Spindles for axial positioning
- Power Transmission Systems
- Material Handling Equipment
