Manufactured by CHG Bearing, the R188* is a precision Inch Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 6.35 mm bore diameter, a 12.7 mm outer diameter, and a 3.175 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.
R188* - Inch Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | R188* |
| Dimensions | |
| Bore Diameter (d) | 6.35 mm |
| Width (B) | 3.175 mm |
| Outer Diameter (D) | 12.7 mm |
| Open Width B | 3.175 mm |
| Radius rs min | 0.15 mm |
| Flange Df | 13.894 mm |
| Closed Width B1 | 4.762 mm |
| Open Flange Width Bf | 0.584 mm |
| Closed Flange Width Bf1 | 1.143 mm |
| Performance | |
| Dynamic Load Cr (N) | 1082 N |
| Static Load C0r (N) | 442 N |
| Grease Speed (x1000 rpm) | 40 x1000 rpm |
| Oil Speed (x1000 rpm) | 50 x1000 rpm |
| Design Configurations | |
| Open Model | R188* |
| Flanged Open Model | FR188* |
| Shielded Model | R188ZZ* |
| Flanged Shielded Model | FR188ZZ* |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | TTS |
| Internal Design & Weight | |
| Cage Type | J |
| Ball Qty. Z | 8 |
| Ball Size Dw | 2 mm |
| Shielded Weight (g) | 2.32 g |
| Flanged Shielded Weight (g) | 2.54 g |
| Open Weight (g) | 1.6 g |
| Flanged Open Weight (g) | 1.71 g |
R188* 12.7 mm 6.35 mm 3.175 mm Frequently Asked Questions about R188* 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 R188* 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.
The CHG Bearing R188* 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.
The Open Type engineered for R188* 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.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing R188* correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
