Manufactured by CHG Bearing, the 686 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 6 mm bore diameter, a 13 mm outer diameter, and a 3.5 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.
686 - Metric Miniature Deep Groove Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 686 |
| Dimensions | |
| Bore Diameter (d) | 6 mm |
| Width (B) | 3.5 mm |
| Outer Diameter (D) | 13 mm |
| Open Width B | 3.5 mm |
| Radius rs min | 0.15 mm |
| Flange Df | 15 mm |
| Closed Width B1 | 5 mm |
| Open Flange Width Bf | 1 mm |
| Closed Flange Width Bf1 | 1.1 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 | 686 |
| Flanged Open Model | F686 |
| Shielded Model | 686ZZ |
| Flanged Shielded Model | F686ZZ |
| 2RS | 2RS |
| 2RU | 2RU |
| TTS | TTS |
| Internal Design & Weight | |
| Cage Type | J, TW |
| Ball Qty. Z | 8 |
| Ball Size Dw | 2 mm |
| Shielded Weight (g) | 2.68 g |
| Flanged Shielded Weight (g) | 3.06 g |
| Open Weight (g) | 1.87 g |
| Flanged Open Weight (g) | 2.21 g |
686 13 mm 6 mm 3.5 mm Frequently Asked Questions about 686 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To ensure optimum performance of CHG Bearing 686 Metric 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 mm bore. For the 13 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
Quality starts with raw material selection: CHG Bearing crafts 686 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
Beyond standard alloy steel, CHG Bearing can customize the 686 Metric Miniature Deep Groove Ball Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
In its sealed configuration (Open Type), CHG Bearing pre-charges 686 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.
