Manufactured by CHG Bearing, the 637 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 7 mm bore diameter, a 26 mm outer diameter, and a 9 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.
637 - Metric Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 637 |
| Dimensions | |
| Bore Diameter (d) | 7 mm |
| Width (B) | 9 mm |
| Outer Diameter (D) | 26 mm |
| Open Width B | 9 mm |
| Radius rs min | 0.3 mm |
| Closed Width B1 | 9 mm |
| Performance | |
| Dynamic Load Cr (N) | 4563 N |
| Static Load C0r (N) | 1983 N |
| Grease Speed (x1000 rpm) | 28 x1000 rpm |
| Oil Speed (x1000 rpm) | 34 x1000 rpm |
| Design Configurations | |
| Open Model | 637 |
| Flanged Open Model | - |
| Shielded Model | 637ZZ |
| 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) | 25.8 g |
| Open Weight (g) | 24.2 g |
637 26 mm 7 mm 9 mm Frequently Asked Questions about 637 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To match diverse operational dynamics, CHG Bearing supplies 637 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.
As standard production, CHG Bearing subjects 637 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
To safeguard CHG Bearing 637 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (7 mm x 26 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Standard batches of CHG Bearing 637 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
