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Bearing specifications
638/4-2Z
Deep Groove Ball Bearing
- HCT SKU
- HCT-007792
- Series
- 638
- Configuration
- Single row · CN
- Bore (d) 4 mm
- Outside (D) 9 mm
- Width (B) 4 mm
- Dynamic load (C) 0.423 kN
pcs
Overview
HCT Bearings supplies the 638/4-2Z deep groove ball bearing (4 mm bore x 9 mm outside diameter x 4 mm width). Factory-direct sourcing with complete dimensional and load-rating data available on this page. Request a quote for volume pricing, lead time and availability.
Bearing designation
Designation breakdown for 638/4-2Z.
- 638 Basic designation series 638
- / 4 —
- - 2Z —
Product information
Units
Dimensions and mass
| Bore diameter (d) | 4 mm |
|---|---|
| Outer diameter (D) | 9 mm |
| Width (B) | 4 mm |
Basic load ratings
| Dynamic load rating (C) | 0.423 kN |
|---|---|
| Static load rating (C0) | 0.116 kN |
Speeds
| Reference speed | 140 000 r/min |
|---|---|
| Limiting speed | 70 000 r/min |
Design and properties
- Internal Clearance
- CN normal
- Rows
- Single row
- Material
- Bearing steel
Converted values are shown for convenience only. The metric figures are the published data.
Specifications are provided for product selection and may vary by configuration. Please contact us for confirmation before ordering.
