Manufactured by CHG Bearing, the R2* is a precision Inch Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 3.175 mm bore diameter, a 9.525 mm outer diameter, and a 3.967 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.
R2* - Inch Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | R2* |
| Dimensions | |
| Bore Diameter (d) | 3.175 mm |
| Width (B) | 3.967 mm |
| Outer Diameter (D) | 9.525 mm |
| Open Width B | 3.967 mm |
| Radius rs min | 0.3 mm |
| Flange Df | 11.176 mm |
| Closed Width B1 | 3.967 mm |
| Open Flange Width Bf | 0.762 mm |
| Closed Flange Width Bf1 | 0.762 mm |
| Performance | |
| Dynamic Load Cr (N) | 631 N |
| Static Load C0r (N) | 219 N |
| Grease Speed (x1000 rpm) | 56 x1000 rpm |
| Oil Speed (x1000 rpm) | 67 x1000 rpm |
| Design Configurations | |
| Open Model | R2* |
| Flanged Open Model | FR2* |
| Shielded Model | R2ZZ* |
| Flanged Shielded Model | FR2ZZ* |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 7 |
| Ball Size Dw | 1.588 mm |
| Shielded Weight (g) | 1.37 g |
| Flanged Shielded Weight (g) | 1.53 g |
| Open Weight (g) | 1.04 g |
| Flanged Open Weight (g) | 1.2 g |
R2* 9.525 mm 3.175 mm 3.967 mm Frequently Asked Questions about R2* Inch Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing R2* against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (3.175 mm x 9.525 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
The CHG Bearing R2* is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
Each R2* produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (3.175 mm bore side) ensures perfect planar contact without edge binding.
Model R2* is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 3.175 mm) and steep thermal gradients between inner and outer rings.
