QJ 310 MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 310 MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1.35 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.013mm to 0
Width
27 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2 mm
Distance from side face to load point
56 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
65 mm
Outer Ring Dimensions
Shoulder diameter outer ring
90 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
26550 lbf
Radial static load rating
22500 lbf
Limiting speed
11 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
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In Stock
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QJ 310 MA Bearing Product Overview & Core Advantages
The QJ 310 MA 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 bidirectional axial loads, within a compact cross-section. Manufactured to P6 (ABEC-3) tolerance class, it ensures high running accuracy and rotational stability, making it an ideal solution for high-reliability machinery requiring precise motion control.
QJ 310 MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| MA | Indicates the bearing is pre-lubricated with a specific grease. This facilitates immediate installation and initial operation without the need for additional lubrication. |
QJ 310 MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows a single bearing to withstand combined radial and axial loads from both directions. This design offers a space-saving and cost-effective alternative to traditional bearing arrangements.
- High Load Capacity: With a dynamic load rating of 26,550 lbf and a static load rating of 22,500 lbf, this bearing is built for durability and long service life under significant stress.
- Precision & Stability: The P6 tolerance class ensures minimal runout and consistent performance, which is critical for applications requiring high positional accuracy.
- Robust Construction: Components made from chrome steel and a brass cage provide excellent strength, wear resistance, and reliable operation at the specified limiting speed of 11,000 rpm.
- Ready-to-Install: The pre-lubricated (MA) and open seal type design simplifies maintenance and ensures optimal performance from the first rotation.
QJ 310 MA Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision and the ability to handle complex load scenarios. Key industries and equipment include:
- Industrial Robots (e.g., robotic arms and rotary joints)
- Precision Rotary Tables and Indexing Heads
- Machine Tool Spindles and Turntables
- Aerospace Actuation Systems
- Medical and Semiconductor Manufacturing Equipment
