QJ 316 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 316 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
4.6 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
80 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
170 mm
Outside diameter tolerance
-0.018mm to 0
Width
39 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
88 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
111 mm
Outer Ring Dimensions
Shoulder diameter outer ring
139 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
52200 lbf
Radial static load rating
51300 lbf
Limiting speed
7 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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QJ 316 N2MA Bearing Product Overview & Core Advantages
The QJ 316 N2MA is a metric single row four-point contact ball bearing engineered for exceptional performance in demanding applications. This precision bearing is distinguished by its ability to simultaneously support substantial combined loads, including radial loads and axial loads in both directions, within a single, compact unit. Manufactured to a P6 (ABEC-3) tolerance class and pre-lubricated, it delivers high running accuracy, reliability, and is ready for immediate installation, making it an ideal solution for high-rigidity and high-speed requirements.
QJ 316 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ 316 | Standard designation for a four-point contact ball bearing with a 80mm bore. |
| N2 | Indicates two integral circlips (snap rings) on the outer ring for simplified axial location within a housing. |
| MA | Signifies that the bearing is filled with a specific high-performance lubricant, ensuring optimal performance from the start. |
QJ 316 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The optimized raceway geometry allows the bearing to handle combined radial and axial loads from any direction with a single bearing, simplifying assembly and saving space.
- High Rigidity & Load Capacity: The single-row construction with a large ball complement and a robust brass cage provides high stiffness and excellent dynamic and static load ratings (52,200 lbf dynamic, 51,300 lbf static).
- Precision & Speed: Built to P6 tolerance for high running accuracy. The brass cage contributes to stable operation and a high limiting speed of 7,000 rpm.
- Simplified Mounting: The inclusion of outer ring circlips (N2) eliminates the need for complex housing shoulders or end caps, reducing design complexity and assembly time.
- Ready-to-Use: The bearing is pre-lubricated, offering immediate protection and performance within a wide operating temperature range of -30°C to 110°C.
QJ 316 N2MA Bearing Typical Application Areas
This bearing's unique combination of compact design, high load capacity, and precision makes it suitable for a wide range of industrial machinery, including:
- Robotics (e.g., robotic arms and joints)
- Industrial Turntables and Indexing Tables
- Machine Tool Components (e.g., rotary tables, spindles)
- Material Handling Equipment
- Wind Turbine Yaw and Pitch Systems
