7311B 55*120*29mm Single Row Angular Contact Ball Bearing
The 7311B bearing,with a bore diameter of 55 mm, outside diameter 120 mm, and
width of 29 mm.This single row angular contact ball bearing can
support both radial and axial loads simultaneously, with the axial
load being accommodated in one direction only. Depending on the
specific model, this bearing is capable of operating at high speeds
or even extremely high speeds. Compared to deep groove ball
bearings, it can withstand significantly greater unidirectional
axial forces.It is particularly well-suited for situations needing robust handling
of both radial and significant unidirectional axial loads at high
speeds.
| Part Number | 7311 B |
| Bearing Type | Angular Contact |
| Measurement Unit | Metric |
| Dimensions | Inner Bore Diameter (d) | 55 mm |
| Outer Bore Diameter (D) | 120 mm |
| Width (B) | 29 mm |
| Specifications | Contact Angle | 40° |
| Material | Chrome Steel |
| Cage Material | Stell |
| Number of Rows | Single Row |
| Seal Type | Open |
| Temperature Range | -30°C to 150°C |
| Lubrication | Lubricated |
| Tolerance Class | P6 (ABEC-3) |
| Weight | 1.45 kg |
| Matched Arrangement | No |
| Universal Matching Bearing | No |
| Load and Speed | Dynamic Radial Load | 78800 N |
| Static Radial Load | 56500 N |
| Reference Speed For Grease (r/min) | 4,500 rpm |
| Limiting Speed For Oil(r/min) | 6,000 rpm |
What's the Performance Features of 7311B Bearing?
- High-Speed Operation: With minimal friction, this bearing is designed for stable
performance at high speeds.
- Precision and Durability: It offers high precision and strength, making it suitable for
applications requiring accurate shaft rotation.
- Angular Contact Design: This design efficiently handles both axial and radial loads,
enhancing load capacity and extending the bearing's life.
- Single Direction Load Support: Capable of managing axial loads in one direction along with
radial loads, ideal for applications where forces act mainly in one
direction.
What's the Applications of the 7311B Bearing?
The 7311B bearing, as an angular contact ball bearing, is widely
used in the following fields due to its high speed, high load
capacity, and ability to carry bidirectional axial loads:
1. Industrial Machinery and Equipment
- Metalworking: Used in coil plate machines, nail heel machines, and
other equipment requiring high-precision rotary support.
- Chemical and Mixing: Suitable for dry powder mixers, chemical
equipment, and vibrating dryers, withstanding medium loads in
corrosive environments.
2. Engineering and Construction Machinery
- Lifting and Transport: Applied in tower cranes, conveyors, and
similar equipment, adapting to heavy and shock loads.
- Machinery Components: Provides stable support for drill bushings,
hydraulic systems, and other components.
3. Special Equipment and Precision Instruments
- Electronics Manufacturing: Ensures low-vibration operation in
terminal machines, pick-and-place machines, and semiconductor
packaging equipment.
- Laboratory and Testing: Supports high-precision measurements in
hardness testers, vibration platforms, and similar devices.
4. Automotive and Transportation
- Automotive Components: Optimizes transmission efficiency in
steering systems, gearboxes, and hub bearings.
- Emerging Applications: Some companies are exploring its use in
flying car hub bearings.
5. Other Applications
- Agricultural Machinery: Used in transmission components of
harvesters and irrigation equipment.
- Home Appliances: Suitable for high-speed applications like shielded
pumps and air conditioning compressors.
For any questions or inquiries, please feel free to contact us.
| Bearing Number | Dimensions (mm) | Basic Load Rating(N) | Limiting Speeds(rpm) | Reference
Weight(Kg) |
| Inner Diameter | Outer Diameter | Width | Chamfer | Dynamic | Static | Grease | Oil |
| d | D | B | rmin | r1min | Cr | Cor | Non-contact | Wt ≈ |
| 7301B | 12 | 37 | 12 | 0.60 | 0.30 | 9600 | 4000 | 16000 | 24000 | 0.060 |
| 7302B | 15 | 42 | 13 | 1.00 | 0.60 | 12000 | 6000 | 14000 | 22000 | 0.080 |
| 7303B | 17 | 47 | 14 | 1.00 | 0.60 | 14000 | 8000 | 13000 | 18000 | 0.110 |
| 7304B | 20 | 52 | 15 | 1.00 | 0.60 | 17300 | 9650 | 11000 | 15000 | 0.140 |
| 7305B | 25 | 62 | 17 | 1.10 | 0.60 | 26200 | 15200 | 8500 | 12000 | 0.300 |
| 7306B | 30 | 72 | 19 | 1.10 | 0.60 | 31000 | 19200 | 7500 | 10000 | 0.370 |
| 7307B | 35 | 80 | 21 | 1.50 | 0.60 | 38200 | 24500 | 7000 | 9500 | 0.510 |
| 7308B | 40 | 90 | 23 | 1.50 | 0.60 | 46200 | 30500 | 6300 | 8500 | 0.670 |
| 7309B | 45 | 100 | 25 | 1.50 | 0.60 | 59500 | 39800 | 6000 | 8500 | 0.900 |
| 7310B | 50 | 110 | 27 | 2.00 | 0.60 | 68200 | 48000 | 5000 | 6700 | 1.150 |
| 7311B | 55 | 120 | 29 | 2.0 | 1.0 | 78800 | 56500 | 4500 | 6000 | 1.450 |
| 7312B | 60 | 130 | 31 | 2.1 | 1.1 | 90000 | 66300 | 4300 | 5600 | 1.850 |
| 7313B | 65 | 140 | 33 | 2.1 | 1.1 | 102000 | 77800 | 4000 | 5300 | 2.250 |
| 7314B | 70 | 150 | 35 | 2.1 | 1.1 | 115000 | 87200 | 3600 | 4800 | 2.750 |
| 7315B | 75 | 160 | 37 | 2.1 | 1.1 | 125000 | 98500 | 3400 | 4500 | 3.300 |
| 7316B | 80 | 170 | 39 | 2.1 | 1.1 | 135000 | 110000 | 3600 | 4200 | 3.90 |
| 7317B | 85 | 180 | 41 | 3.0 | 1.1 | 148000 | 122000 | 3000 | 4000 | 4.60 |
| 7318B | 90 | 190 | 43 | 3.0 | 1.1 | 158000 | 138000 | 2800 | 3800 | 5.40 |
| 7319B | 95 | 200 | 45 | 3.0 | 1.1 | 172000 | 155000 | 2800 | 3600 | 6.25 |
| 7320B | 100 | 215 | 47 | 3.0 | 1.1 | 188000 | 180000 | 2400 | 3400 | 7.75 |
| 7321B | 105 | 225 | 49 | 3.0 | 1.1 | 202000 | 195000 | 2200 | 3200 | 8.80 |
| 7322B | 110 | 240 | 50 | 3.0 | 1.1 | 225000 | 225000 | 2000 | 3000 | 10.50 |
| 7328B | 140 | 300 | 62 | 4.0 | 1.5 | 288000 | 315000 | 1700 | 2400 | 22.44 |
| CERTIFICATE | RoHS & REACH, IATF16949:2016 |
| Feature | High Speed and Stiffness,High Running Accuracy,High Load Carrying
Capacity |
| Service | OEM&ODM Customized Services |
| Samples | Please Contact Us |
| Service | Online Support,Professional Service |
| Size | Standard,For custom sizes ,please contact us |
| Factory Manufacturer | Yes |
