S688
Stainless Steel 6800 Series Thin Section Ball Bearings
The S688 designation defines the size and shape of this ball bearing. Materials, clearances and tolerances can be tailored to your application during quotation — the specifications below are the standard configuration.
Specifications — S688
Bearing Dimensions
| d (mm) | 8 |
|---|---|
| D (mm) | 16 |
| B (mm) | 4 |
| r min | 0.3 |
Load Ratings
| Cr (KN) | 1.378 |
|---|---|
| Cor (KN) | 0.711 |
Limiting Speeds
| Grease | 29000 rpm |
|---|---|
| Oil | 38000 rpm |
Design & Construction
| Serie | Stainless Steel 6800 Series Thin Section Ball Bearings |
|---|---|
| Material | AISI 440C stainless steel |
| Bearing type | Ball bearing |
| Ball NO. | 9 |
| Ball Size | 2.381 |
| Weight (kg) | 0.0031 |
Lubrication & Operating Temperature
- Open version: oil lubrication recommended for maximum speed.
- Sealed version (2RS): maintenance-free grease lubrication.
- Standard greases typically limit continuous operation to about 120 °C; the AISI 440C stainless rings and cage permit up to 150 °C.
- Food-grade (H1) or high-temperature lubrication available on request — contact us.
Typical Applications
Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment.
About the S688
The S688 is a 6800 Series stainless steel bearing manufactured by ZGBK Bearings (Wuxi, China). It features a bore (inner diameter) of 8 mm, an outer diameter of 16 mm, a width of 4 mm. Built from corrosion-resistant AISI 440C stainless steel, it is suited to food processing, medical, marine and chemical equipment where reliability in harsh environments matters. Full specifications are listed below.
ZGBK manufactures the S688 as part of the Stainless Steel 6800 Series Thin Section Ball Bearings, using AISI 440C stainless steel for superior corrosion resistance in wet, chemical and food-grade environments. Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment. As a direct factory in Wuxi, China, we support small-batch orders, custom dimensions and fast samples for qualified buyers.