51448
51300 & 51400 Series Heavy Duty Thrust Ball Bearings
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Part No.
Part No.
51448
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
114.2 kg
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
240 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
440 mm
Outside diameter tolerance
-0.045mm to 0
Width
160 mm
Width tolerance
+0.03mm to -0.4mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
223910 lbf
Axial static load rating
963306 lbf
Limiting speed
0.34 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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51448 Bearing Product Overview & Core Advantages
The 51448 is a thrust ball bearing designed specifically for heavy-duty axial load applications. Engineered with 52100 Chrome Steel rings and balls, this metric bearing delivers exceptional durability and load-carrying capacity. Its primary advantage lies in its ability to handle extremely high axial static load ratings of 963,306 lbf and axial dynamic load ratings of 223,910 lbf, making it ideal for applications requiring robust thrust support in a single direction. The open design ensures maximum capacity but requires proper lubrication and sealing in the application.
51448 Bearing Model Code Explained, Specifications & Naming Convention
| Model Element | Technical Significance |
|---|---|
| 51448 | Standard metric thrust ball bearing designation, defining the core dimensions: 240mm bore, 440mm OD, 160mm width. |
| Open (Seal Type) | No integrated seals or shields. This configuration provides the highest possible load capacity but necessitates external sealing in the application environment. |
51448 Bearing Structural Features & Performance Benefits
- High Load Capacity: The bearing's geometry and use of high-grade 52100 Chrome Steel for both rings and balls are optimized to withstand immense axial thrust loads. The axial static load rating is exceptionally high for demanding, slow-rotation or static applications.
- Robust Construction: The Chrome Steel cage ensures proper ball guidance and spacing, contributing to stable operation under load.
- Precision Tolerances: The tight bore and outside diameter tolerances ensure a precise fit, critical for maintaining alignment and performance in heavy machinery.
- Material Integrity: Manufactured from 52100 Chrome Steel, the bearing offers high hardness, wear resistance, and long service life under strenuous conditions.
- Compliance: The bearing is compliant with ROHS and REACH regulations, ensuring it meets modern environmental and safety standards.
51448 Bearing Typical Application Areas
This thrust ball bearing is engineered for machinery and systems that experience significant unidirectional axial forces. Key applications include:
- Heavy Industrial Machinery: Vertical pumps, extruders, and large gearboxes.
- Power Generation Equipment: Thrust supports in hydroelectric turbines and wind turbine main shafts.
- Marine and Offshore: Propulsion systems, stern tube bearings, and crane slew rings.
- Construction Equipment: Large boring machines, tunnel boring machines (TBMs), and heavy-duty jacks.
