51217
51200 Series Single Direction Thrust Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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51217 Bearing Product Overview & Core Advantages
The 51217 metric thrust ball bearing is engineered for demanding applications requiring high axial load capacity and precision. As a single-direction thrust ball bearing, it is specifically designed to accommodate heavy axial loads in one direction while allowing for high-speed operation. Its construction from 52100 Chrome Steel for both rings and balls ensures exceptional durability and wear resistance. This bearing is ideal for high-reliability scenarios where precise axial positioning and robust load handling are paramount, offering a compact design with a significant axial dynamic load rating of 21,938 lbf.
51217 Bearing Model Code Explained, Specifications & Naming Convention
The model number 51217 follows a standard designation system for metric thrust ball bearings. A breakdown of its key characteristics is provided below:
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 5 | Thrust Ball Bearing Series | Indicates a single-direction thrust ball bearing design. |
| 1 | Light Cross-Section | Denotes a series with specific dimensional proportions. |
| 217 | Bore Diameter Code | Specifies a bore diameter of 85 mm. |
| Open (Seal Type) | No Seals or Shields | Allows for higher limiting speeds and is suitable for applications where external sealing is provided. |
51217 Bearing Structural Features & Performance Benefits
The 51217 bearing's performance is derived from its specific structural design and material selection:
- High Axial Load Capacity: The bearing is optimized to handle substantial axial dynamic load ratings (21,938 lbf) and even higher axial static load ratings (61,875 lbf), making it suitable for heavy-duty thrust applications.
- Precision Ground Components: With tight bore and outside diameter tolerances, this bearing ensures precise axial location and smooth operation, contributing to overall system accuracy.
- High-Speed Capability: The use of a stainless steel cage and the open design contribute to a high limiting speed of 3,000 rpm, reducing centrifugal forces and maintaining stability.
- Robust Material Construction: Manufactured from 52100 Chrome Steel for rings and balls, the bearing offers high hardness, excellent fatigue life, and reliable performance within its specified temperature range of -30° to 110 °C.
51217 Bearing Typical Application Areas
The 51217 thrust ball bearing is commonly specified in industrial machinery and systems where significant unidirectional axial loads are present. Key application areas include:
- Industrial Pumps and Compressors: For supporting axial thrust from impellers.
- Machine Tool Components: Used in vertical milling heads, lathe tailstocks, and indexing tables for precise axial positioning.
- Automotive and Transportation: Applications in steering mechanisms and clutch release systems.
- Heavy Machinery: Cranes, hoists, and other equipment requiring high-capacity thrust support.
