QJ 314 MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 314 MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
3.15 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.015mm to 0
Width
35 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
77 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
89 mm
Outer Ring Dimensions
Shoulder diameter outer ring
123 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
45000 lbf
Radial static load rating
40500 lbf
Limiting speed
8 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 314 MA Bearing Product Overview & Core Advantages
The QJ 314 MA is a metric single row four-point contact ball bearing engineered for exceptional performance in demanding applications. This precision bearing is designed to simultaneously withstand combined loads, including radial loads and axial loads from both directions, making it an ideal solution for compact, high-rigidity designs. Manufactured to P6 (ABEC-3) tolerance class, it ensures high running accuracy and reliability. Its open design, when lubricated, facilitates high-speed operation up to 8,000 rpm, establishing it as a robust and versatile component for critical machinery.
QJ 314 MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| MA | Indicates the bearing is pre-lubricated with a specific grease. This suffix is common for bearings supplied ready for immediate installation and operation. |
QJ 314 MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and bidirectional axial loads efficiently with a single bearing row, offering a compact and space-saving solution.
- High Rigidity & Load Capacity: The robust construction, featuring a brass cage for stability, provides high rigidity and supports substantial dynamic (45,000 lbf) and static (40,500 lbf) load ratings.
- High-Speed Capability: The combination of an open design, precision P6 tolerances, and optimized lubrication enables a high limiting speed of 8,000 rpm, suitable for demanding rotational applications.
- Precision & Durability: Manufactured from chrome steel for both rings and balls, this bearing ensures long service life and consistent performance within a wide operating temperature range of -30°C to 110°C.
QJ 314 MA Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision and the ability to support complex load scenarios. Key industries and equipment include:
- Industrial Robotics: Used in robot arm joints and rotary units.
- Machine Tools: Applied in rotary tables, indexing heads, and spindle supports.
- Material Handling: Suitable for slewing rings in turntables and positioners.
- Aerospace & Defense: Employed in radar platforms, antenna positioning systems, and flight control mechanisms.
