QJ 1252 N2MA
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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QJ 1252 N2MA Bearing Product Overview & Core Advantages
The QJ 1252 N2MA is a metric four-point contact ball bearing engineered for applications requiring exceptional load handling in compact spaces. This single-row construction features a unique raceway geometry that enables it to simultaneously support substantial radial loads and axial loads from both directions. Manufactured to P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability, making it an ideal solution for precision machinery and heavy-duty equipment where space constraints and high load capacity are critical factors.
QJ 1252 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| N2 | Snap ring groove on outer ring | Facilitates secure axial positioning and simplified housing design |
| MA | Brass cage guided by outer ring | Enhanced stability at moderate speeds and superior guidance in demanding conditions |
QJ 1252 N2MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The optimized raceway geometry creates four contact points between balls and raceways, enabling the bearing to handle combined radial and axial loads efficiently in both directions with a single-row configuration.
High Load Capacity: With a dynamic load rating of 166,725 lbf and static load rating of 328,500 lbf, this bearing delivers exceptional durability under heavy operating conditions.
Precision Performance: Manufactured to P6 tolerance class with precisely controlled dimensions (bore: 260 mm, OD: 480 mm, width: 90 mm), ensuring consistent performance and easy installation.
Robust Construction: Chrome steel rings and balls combined with a brass cage provide excellent wear resistance and mechanical strength, suitable for applications with limiting speeds up to 2,200 rpm.
Temperature Compatibility: Operating temperature range of -30°C to 110°C with appropriate lubrication, ensuring reliable performance across various environmental conditions.
QJ 1252 N2MA Bearing Typical Application Areas
- Industrial Robotics: Rotary joints and positioning systems requiring compact design and multi-directional load capacity
- Machine Tool Components: Rotary tables, indexing heads, and precision positioning devices
- Material Handling Equipment: Slewing rings for cranes, excavators, and heavy machinery
- Wind Turbine Systems: Yaw and pitch control mechanisms demanding high reliability
- Construction Machinery: Swing bearings for compact excavators and aerial work platforms
