51438
51300 & 51400 Series Heavy Duty Thrust Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
51438
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
85.2 kg
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
190 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
380 mm
Outside diameter tolerance
-0.04mm to 0
Width
150 mm
Width tolerance
+0.03mm to -0.4mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
216941 lbf
Axial static load rating
644078 lbf
Limiting speed
0.35 X 1000 rpm
Lubrication
Required
Materials
Ring material
52100 Chrome Steel
Ball material
52100 Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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51438 Bearing Product Overview & Core Advantages
The 51438 is a metric thrust ball bearing engineered for demanding applications requiring exceptional axial load capacity. This precision bearing is designed exclusively to accommodate heavy thrust loads in one direction, featuring a robust construction with a 190 mm bore and 380 mm outside diameter. Manufactured from 52100 Chrome Steel, it delivers high strength and durability, making it an ideal solution for high-load, low-speed scenarios where reliable axial support is critical. Its open design necessitates proper lubrication for optimal performance.
51438 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 51438 | Basic bearing designation, defining the core bearing dimensions (190mm bore, 380mm OD, 150mm width). |
| (No Suffix) | Indicates an open (unsealed) bearing design. Lubrication is required for operation. |
51438 Bearing Structural Features & Performance Benefits
- High Axial Load Capacity: The bearing's geometry and use of high-grade 52100 Chrome Steel for both rings and balls enable it to support substantial axial dynamic load ratings of 216,941 lbf and axial static load ratings of 644,078 lbf.
- Robust Construction: The Chrome Steel cage ensures secure ball guidance and contributes to the overall structural integrity under heavy loads.
- Precision Tolerances: Tight dimensional tolerances on the bore, outside diameter, and width guarantee precise fitment and reliable performance in the assembly.
- Application-Specific Limiting Speed: With a limiting speed of 0.35 x 1000 rpm, this bearing is optimized for low to moderate rotational speeds under high thrust conditions.
51438 Bearing Typical Application Areas
This heavy-duty thrust ball bearing is commonly specified in industries and equipment such as:
- Vertical Pumps and Turbines
- Heavy-Duty Industrial Gearboxes
- Crane Hooks and Lifting Systems
- Large Valves and Actuators
- Presses and Stamping Machinery
