Manufactured by CHG Bearing, the 6704 is a precision Metric Super-Thin Deep Groove Ball Bearings. Key dimensional parameters include a 20 mm bore diameter, a 27 mm outer diameter, and a 4 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.
6704 - Metric Super-Thin Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 6704 |
| Dimensions | |
| Bore Diameter (d) | 20 mm |
| Width (B) | 4 mm |
| Outer Diameter (D) | 27 mm |
| Radius rs min | 0.2 mm |
| Flange Df | 28.5 mm |
| Flange Width Bf | 0.8 mm |
| Performance | |
| Dynamic Load Cr (N) | 1402 N |
| Static Load C0r (N) | 729 N |
| Grease Speed (x1000 rpm) | 8.5 x1000 rpm |
| Oil Speed (x1000 rpm) | 10 x1000 rpm |
| Design Configurations | |
| Open Model | 6704 |
| Flanged Open Model | F6704 |
| Shielded Model | 6704ZZS |
| Flanged Shielded Model | F6704ZZS |
| 2RS | 2RS |
| 2RU | - |
| TTS | TTS |
| Internal Design & Weight | |
| Cage Type | W |
| Ball Qty. Z | 18 |
| Ball Size Dw | 1.588 mm |
| Shielded Weight (g) | 5.9 g |
| Flanged Shielded Weight (g) | 6.3 g |
6704 27 mm 20 mm 4 mm Frequently Asked Questions about 6704 Metric Super-Thin Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
In its sealed configuration (Open Type), CHG Bearing pre-charges 6704 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Standard batches of CHG Bearing 6704 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
To safeguard CHG Bearing 6704 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (20 mm x 27 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
For international ocean and air freight, CHG Bearing packs 6704 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.
