51218
51200 Series Single Direction Thrust Ball Bearings
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Part No.
Part No.
51218
Basic Information
Bearing type
Ball
System of measurement
Metric
Weight
1.7 kg
Seal type
Open
For load direction
Thrust
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.02mm to 0
Outside diameter
135 mm
Outside diameter tolerance
-0.025mm to 0
Width
35 mm
Width tolerance
+0.025mm to -0.3mm
Chamfer dimension
1.1 mm
Ball & Washer Dimensions
Housing washer inner diameter
93 mm
Shaft washer outer diameter
135 mm
Performance
Temperature range
-30° to 110 °C
Axial dynamic load rating
25200 lbf
Axial static load rating
65250 lbf
Limiting speed
2.8 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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51218 Bearing Product Overview & Core Advantages
The 51218 is a metric thrust ball bearing engineered for demanding applications requiring high axial load capacity and precision operation. This thrust bearing is designed to accommodate heavy thrust loads in a single direction, making it an ideal solution for high-stress environments. Its construction from high-grade 52100 Chrome Steel for both rings and balls ensures exceptional durability and long service life. The open design allows for versatile lubrication options, while the precise dimensional tolerances guarantee reliable performance and ease of integration into high-precision assemblies.
51218 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 51218 | Basic Model Number | Indicates a single-direction thrust ball bearing with a 90mm bore and 135mm outside diameter. |
| Open (Seal Type) | No Integral Seals or Shields | Allows for custom lubrication schemes and high-speed operation, suitable for controlled environments. |
51218 Bearing Structural Features & Performance Benefits
- High Axial Load Capacity: Engineered with a robust single-direction design, this bearing delivers a high axial dynamic load rating of 25,200 lbf and an exceptional axial static load rating of 65,250 lbf, making it suitable for heavy thrust applications.
- Precision & Rigidity: Manufactured with tight dimensional tolerances on the bore diameter and outside diameter, it ensures precise shaft and housing fits, contributing to system stability and high rigidity.
- Optimized for Performance: The stainless steel cage provides strength and corrosion resistance, contributing to smooth operation at the limiting speed of 2,800 rpm. The open structure facilitates efficient lubrication management for optimal performance.
- Material Integrity: Components made from 52100 Chrome Steel offer high hardness and wear resistance, ensuring reliability across the specified temperature range of -30°C to 110°C.
51218 Bearing Typical Application Areas
This thrust ball bearing is widely used in industries and machinery where significant unidirectional axial forces are present. Key applications include:
- Heavy-Duty Industrial Machinery: Such as vertical pumps, heavy-duty gearboxes, and crane hooks.
- Automotive Systems: Including clutch release mechanisms and steering columns.
- Power Transmission: Applications in worm gear reducers and other speed reduction units.
- General Engineering: Wherever a reliable, high-capacity thrust bearing is required for axial load support.
