Manufactured by CHG Bearing, the 639 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 9 mm bore diameter, a 30 mm outer diameter, and a 10 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
639 - Metric Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 639 |
| Dimensions | |
| Bore Diameter (d) | 9 mm |
| Width (B) | 10 mm |
| Outer Diameter (D) | 30 mm |
| Open Width B | 10 mm |
| Radius rs min | 0.6 mm |
| Closed Width B1 | 10 mm |
| Performance | |
| Dynamic Load Cr (N) | 4659 N |
| Static Load C0r (N) | 2080 N |
| Grease Speed (x1000 rpm) | 24 x1000 rpm |
| Oil Speed (x1000 rpm) | 30 x1000 rpm |
| Design Configurations | |
| Open Model | 639 |
| Flanged Open Model | - |
| Shielded Model | 639ZZ |
| Flanged Shielded Model | - |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 7 |
| Ball Size Dw | 4.762 mm |
| Shielded Weight (g) | 37.1 g |
| Open Weight (g) | 36.2 g |
639 30 mm 9 mm 10 mm Frequently Asked Questions about 639 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Every production batch of CHG Bearing 639 Metric Miniature Deep Groove Ball Bearings comes with complete traceability. Upon shipment, CHG Bearing can provide EN 10204 3.1 Material Test Reports (MTR), Certificates of Conformity (CoC), spectral chemical composition analysis, and dimensional inspection sheets.
Yes, 100% of 639 Metric Miniature Deep Groove Ball Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
To ensure optimum performance of CHG Bearing 639 Metric Miniature Deep Groove Ball Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 9 mm bore. For the 30 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
To match diverse operational dynamics, CHG Bearing supplies 639 with multiple cage configurations: high-strength pressed steel ribbon cages for standard duty, solid machined brass cages (M/CA) for heavy vibration and shock loads, or lightweight glass-fiber reinforced polyamide cages (TN9/TVP) for high acceleration and ultra-low noise.
