Miniature ball bearings are a type of small-sized ball bearings designed to handle light loads and operate in compact spaces. They are commonly used in applications where space is limited and low-friction, precise movement is required. Despite their small size, miniature ball bearings offer reliable performance and are essential components in various industries and devices.
Raceway Ring Shape: Ball
Number of Raceway: Single Row
End Type: Shield on both sides
Raceway Ring Shape: Ball
Number of Raceway: Single Row
End Type: Shield on both sides
| 638-2Z Miniature Ball Bearing (ID x OD x W) | ||
| Inner Diameter (ID) | Outer Diameter (OD) | Width (W) |
| 8 mm | 28 mm | 9 mm |
Specifications
| Raceway Ring Shape | Ball | Inner/Outer Ring Material | Steel |
| End Type | Shield on both sides | Outer Ring Type | Flat |
| Precision (JIS) | Grade 0 | Inner Diameter | 8 mm |
| Outer Diameter | 28 mm | Width | 9 mm |
| Dynamic Load Rating | 3.97 kN | Static Load Rating | 1.96 kN |
| Fatigue Load Limit | 0.083 kN | Reference Speed | 67 000 rpm |
| Limiting Speed | 67 000 rpm | Bearing Clearance | CN |
| Max Temperature | 120 °C | Min Temperature | -40 °C |
| Number of Raceway | Single Row | Size Standard | Metric System |
| Cage Material | Steel | Specifications / Environment | Standard |
| Mass | 0.027 kg |
Features and benefits:
- Capable of carrying relatively more minor loads.
- Suitable for low, medium, and high speed applications.
- Suited for low noise and low torque applications.
- Accommodate radial and axial loads in both directions.
Applications
Agriculture
Automotive
Electric Motors
Food Processing Machinery
Papermaking Machinery
Pumps and Compressors
Railway
Wind Energy
FAQ
Q: What are the typical sizes of miniature ball bearings?
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Q: Can miniature ball bearings handle bolt radial and axial loads?
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Q: Are miniature ball bearings suitable for high-speed applications?
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US 17487 
GB 12964 
CA 10829 
AU 4961 
IE 3424 
BR 1035 
NZ 971 
SG 869 
