Bearings
Angular Contact Bearings
Angular Contact Bearings
Quick Code: BB-520497
5311 SC3 NTN Double Row Angular Contact Ball Bearing 55mm x 120mm x 49mm
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Product Specification
Arrangement
Standard version
Brand
NTN
Cage
Sheet steel cage
Clearance
Slightly increased radial clearance
Contact angle
25 degree
Inside Dia
55mm
Material
Standard bearing steel
Outer ring
Without flange/groove
Outside Dia
120mm
Row Type
Double
Seal
None, open bearing
Temperature range
-20 to +150 °C
Tolerance class
Tolerance class P0/PN2 / ABEC 1
Width
49mm
Reference
5311SC3
Additional Reference:
10136044
Quick Order Code
BB-520497
Product Description
5311 SC3 NTN Double Row Angular Contact Ball Bearing
This robust double row angular contact ball bearing from NTN is engineered to deliver exceptional performance in high-speed precision applications requiring simultaneous radial and axial load handling. With its generous 55mm bore and substantial 120mm outer diameter, this bearing is ideal for demanding industrial machinery and heavy-duty equipment operating across varied temperature conditions.
Key Features:
- Double row configuration for enhanced load capacity and superior rigidity
- 25° contact angle optimized for balanced radial and axial load distribution
- Slightly increased radial clearance accommodates thermal expansion and operational requirements
- Sheet steel cage ensures reliable ball positioning and consistent performance
- Open bearing design allows for flexible mounting and customizable sealing options
- Compact yet substantial dimensions: 55mm bore × 120mm outer diameter × 49mm width
- Extended operating temperature range: -20°C to +150°C for high-temperature applications
Specifications:
- Brand: NTN
- Reference: 5311 SC3
- Bore Diameter: 55mm
- Outside Diameter: 120mm
- Width: 49mm
- Row Type: Double
- Seal Type: Open bearing (no seals)
- Contact Angle: 25°
- Cage Material: Sheet steel
- Radial Clearance: Slightly increased
- Tolerance Class: P0/PN2 (ABEC 1)
- Material: Standard bearing steel
- Outer Ring: Without flange or groove
- Temperature Range: -20°C to +150°C
Applications:
The 5311 SC3 is ideal for:
- Heavy-duty gearboxes and power transmission systems
- Industrial spindle applications requiring high-speed operation
- Machine tool spindles and precision equipment
- Rotating shafts in large machinery requiring dual load support
- High-temperature industrial environments
- OEM equipment where custom sealing solutions are preferred
- General industrial machinery requiring reliability and extended operational life
The combination of double row design, extended temperature range, and flexible open bearing configuration makes this NTN bearing an excellent choice for demanding industrial applications requiring robust, long-lasting performance.
