Manufactured by CHG Bearing, the R2A is a precision Inch Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 3.175 mm bore diameter, a 12.7 mm outer diameter, and a 4.366 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.
R2A - Inch Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | R2A |
| Dimensions | |
| Bore Diameter (d) | 3.175 mm |
| Width (B) | 4.366 mm |
| Outer Diameter (D) | 12.7 mm |
| Open Width B | 4.366 mm |
| Radius rs min | 0.3 mm |
| Closed Width B1 | 4.366 mm |
| Performance | |
| Dynamic Load Cr (N) | 640 N |
| Static Load C0r (N) | 227 N |
| Grease Speed (x1000 rpm) | 53 x1000 rpm |
| Oil Speed (x1000 rpm) | 63 x1000 rpm |
| Design Configurations | |
| Open Model | R2A |
| Flanged Open Model | - |
| Shielded Model | R2AZZ |
| Flanged Shielded Model | - |
| 2RS | - |
| 2RU | - |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 7 |
| Ball Size Dw | 1.588 mm |
| Shielded Weight (g) | 3.3 g |
| Open Weight (g) | 3.3 g |
R2A 12.7 mm 3.175 mm 4.366 mm Frequently Asked Questions about R2A Inch Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of R2A Inch 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.
Engineered according to international ISO boundary plans, CHG Bearing supplies R2A with a precision bore diameter (d) of 3.175 mm, an outside diameter (D) of 12.7 mm, and a nominal ring width (B) of 4.366 mm. This configuration yields an effective cross-sectional wall thickness of 4.8 mm and an envelope ratio (D/d) of 4.0, delivering compact rigidity for OEM machinery housings.
The Open Type engineered for R2A by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
Built for demanding industrial environments, the R2A Inch Miniature Deep Groove Ball Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
