QJ 317 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 317 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
5.45 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.018mm to 0
Width
41 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
3 mm
Distance from side face to load point
93 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
117 mm
Outer Ring Dimensions
Shoulder diameter outer ring
148 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
56250 lbf
Radial static load rating
57375 lbf
Limiting speed
6.7 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 317 N2MA Bearing Product Overview & Core Advantages
The QJ 317 N2MA is a metric four-point contact ball bearing designed for exceptional performance in demanding applications. This single-row bearing features an open design and is engineered to simultaneously withstand combined radial and axial loads from both directions. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability. Its compact design, with a 85 mm bore and 180 mm outside diameter, makes it an ideal solution for applications requiring high load capacity and precision in a constrained space.
QJ 317 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| N2 | Indicates two circumferential grooves and three lubrication holes in the outer ring for effective bearing lubrication. |
| MA | Specifies that the bearing is filled with a specific high-temperature lubricant, suitable for the operating temperature range of -30°C to 110°C. |
QJ 317 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and axial loads efficiently. The large load point distance (93 mm) contributes to excellent moment load capacity and operational stability.
- High Load Capacity: With a dynamic load rating of 56,250 lbf and a static load rating of 57,375 lbf, this bearing is built for heavy-duty applications and long service life.
- Precision & Rigidity: The P6 tolerance class ensures high running accuracy, while the brass cage provides dimensional stability and reliable performance at the limiting speed of 6,700 rpm.
- Integrated Lubrication System: The N2 suffix design includes grooves and holes for efficient lubricant distribution, enhancing the bearing's longevity and reducing maintenance needs.
- Robust Material Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high strength and durability under demanding operating conditions.
QJ 317 N2MA Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision and the ability to support complex load combinations. Key industries and machinery include:
- Industrial Gearboxes and power transmission systems
- Machine Tool Spindles and rotating assemblies
- Large Pumps and Compressors
- Material Handling Equipment such as turntables and slewing rings
- Wind Turbine Pitch and Yaw Systems
