3311 DNRCBM
Double Row Angular Contact Ball Bearings
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Part No.
Part No.
3311 DNRCBM
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Double Row
Weight
2.55 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.013mm to 0
Width
49.2 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2 mm
Distance from side face to load point
97 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
81.55 mm
Outer Ring Dimensions
Shoulder diameter outer ring
105.43 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
18675 lbf
Limiting speed
5.3 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
Price:
$ 76.77
/ each
In Stock
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3311 DNRCBM Bearing Product Overview & Core Advantages
The 3311 DNRCBM is a double row angular contact ball bearing designed for applications requiring high precision and exceptional rigidity. This metric bearing excels at simultaneously handling significant combined radial and axial loads from both directions, making it an ideal choice for demanding industrial environments. Its open design, combined with a P6 (ABEC-3) tolerance class, ensures high running accuracy and reliable performance in high-speed operations. The robust construction with a brass cage contributes to its high rigidity and stable operation under complex loading conditions.
3311 DNRCBM Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| D | Double Row Construction |
| NR | Snap Ring Groove on Outer Ring |
| C | Specific Internal Design & Clearance |
| BM | Brass Cage, Machined |
3311 DNRCBM Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior stiffness, enabling the bearing to support substantial combined loads and bidirectional axial forces without compromising performance.
- Precision & High-Speed Capability: Manufactured to a P6 tolerance class, this bearing ensures minimal runout and high rotational accuracy. The optimized internal geometry and brass cage contribute to stable operation at the specified limiting speed of 5,300 rpm.
- Robust Material Construction: Components made from chrome steel offer high fatigue resistance and durability, while the machined brass cage ensures excellent guidance and stability at high speeds.
- Simplified Mounting: The inclusion of a snap ring groove (NR) on the outer ring facilitates secure and straightforward axial location within the housing, reducing assembly complexity.
3311 DNRCBM Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles
- Industrial Gearboxes
- Pumps and Compressors
- Material Handling Equipment
- Precision Industrial Machinery
