Manufactured by CHG Bearing, the R1-5* is a precision Inch Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 2.38 mm bore diameter, a 7.938 mm outer diameter, and a 2.779 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.
R1-5* - Inch Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | R1-5* |
| Dimensions | |
| Bore Diameter (d) | 2.38 mm |
| Width (B) | 2.779 mm |
| Outer Diameter (D) | 7.938 mm |
| Open Width B | 2.779 mm |
| Radius rs min | 0.15 mm |
| Flange Df | 9.119 mm |
| Closed Width B1 | 3.571 mm |
| Open Flange Width Bf | 0.584 mm |
| Closed Flange Width Bf1 | 0.787 mm |
| Performance | |
| Dynamic Load Cr (N) | 552 N |
| Static Load C0r (N) | 176 N |
| Grease Speed (x1000 rpm) | 60 x1000 rpm |
| Oil Speed (x1000 rpm) | 71 x1000 rpm |
| Design Configurations | |
| Open Model | R1-5* |
| Flanged Open Model | FR1-5* |
| Shielded Model | R1-5ZZS* |
| Flanged Shielded Model | FR1-5ZZS* |
| 2RS | - |
| 2RU | - |
| TTS | TTS |
| Internal Design & Weight | |
| Cage Type | W |
| Ball Qty. Z | 6 |
| Ball Size Dw | 1.588 mm |
| Shielded Weight (g) | 1.15 g |
| Flanged Shielded Weight (g) | 1.25 g |
| Open Weight (g) | 0.6 g |
| Flanged Open Weight (g) | 0.67 g |
R1-5* 7.938 mm 2.38 mm 2.779 mm Frequently Asked Questions about R1-5* Inch 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 R1-5* 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.
Quality starts with raw material selection: CHG Bearing crafts R1-5* inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
To safeguard CHG Bearing R1-5* against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (2.38 mm x 7.938 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
As standard production, CHG Bearing subjects R1-5* 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.
