Manufactured by CHG Bearing, the R4A is a precision Inch Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 6.35 mm bore diameter, a 19.05 mm outer diameter, and a 5.558 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.
R4A - Inch Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | R4A |
| Dimensions | |
| Bore Diameter (d) | 6.35 mm |
| Width (B) | 5.558 mm |
| Outer Diameter (D) | 19.05 mm |
| Open Width B | 5.558 mm |
| Radius rs min | 0.4 mm |
| Closed Width B1 | 7.142 mm |
| Performance | |
| Dynamic Load Cr (N) | 2336 N |
| Static Load C0r (N) | 896 N |
| Grease Speed (x1000 rpm) | 36 x1000 rpm |
| Oil Speed (x1000 rpm) | 43 x1000 rpm |
| Design Configurations | |
| Open Model | R4A |
| Flanged Open Model | - |
| Shielded Model | R4AZZ* |
| Flanged Shielded Model | - |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | - |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 6 |
| Ball Size Dw | 3.5 mm |
| Shielded Weight (g) | 10 g |
| Open Weight (g) | 7.48 g |
R4A 19.05 mm 6.35 mm 5.558 mm Frequently Asked Questions about R4A Inch Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
For international ocean and air freight, CHG Bearing packs R4A with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
To ensure optimum performance of CHG Bearing R4A Inch Miniature Deep Groove Ball Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 6.35 mm bore. For the 19.05 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for R4A. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
To safeguard CHG Bearing R4A against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (6.35 mm x 19.05 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
