_1788256344_WNo_800d800.jpg)
Image may differ from product. See technical specification for details.
6208 deep groove ball bearing is a standard single-row bearing in the 6200 series, with a 40 mm bore, 80 mm outer diameter, and 18 mm width. According to CXJSD's 6200 series specifications, the 6208 has a minimum chamfer of 1.1 mm, a dynamic load rating of 29.1 kN, a static load rating of 17.8 kN, and uses 9 balls with a ball diameter of 12 mm. Its rated speed is 8,700 r/min with grease lubrication and 10,000 r/min with oil lubrication, with a weight of approximately 0.366 kg per piece. The 6208 is available in Open, ZZ, 2RZ, and 2RS configurations and is suitable for electric motors, pumps, gearboxes, fans, conveyors, and general industrial machinery.
The CXJSD 6208 is a standard single-row deep groove ball bearing with a 40 mm bore, 80 mm outside diameter and 18 mm width. The following specifications are based on CXJSD's 6200 series product data.
| Parameter | Metric | Imperial |
|---|---|---|
| Bore diameter (d) | 40 mm | 1.5748 in |
| Outside diameter (D) | 80 mm | 3.1496 in |
| Width (B) | 18 mm | 0.7087 in |
| Minimum chamfer (r) | 1.1 mm | 0.0433 in |
| Basic dynamic load rating (Cr) | 29.1 kN | 6,541 lbf |
| Basic static load rating (C0r) | 17.8 kN | 4,002 lbf |
| Number of balls | 9 | — |
| Ball diameter | 12.0 mm | 0.4724 in |
| Grease lubrication speed | 8,700 r/min | — |
| Oil lubrication speed | 10,000 r/min | — |
| Approximate weight | 0.366 kg / 366 g | 0.807 lb |
| Available configurations | Open / ZZ / 2RZ / 2RS | — |
The 6208 uses a single-row deep groove design. Its inner and outer raceways guide nine steel balls, while the cage keeps the balls evenly spaced for stable rotation and low friction.
The inner ring has a 40 mm bore and a precision deep raceway that fits onto the shaft and guides the rolling elements during rotation.
The outer ring has an 80 mm outside diameter and a matching deep raceway that supports the bearing inside the housing.
The CXJSD 6208 uses 9 steel balls with a diameter of approximately 12.0 mm to transfer load between the inner and outer raceways.
The cage keeps the 9 balls evenly spaced and guides their movement to reduce ball-to-ball contact during operation.
The deep circular grooves allow the bearing to support radial loads and axial loads in both directions.
Depending on the configuration, steel shields or rubber seals help retain lubricant and protect the internal components from contaminants.
The raceway is exposed on both sides, making the open version suitable for clean operating environments or applications where relubrication is required.
Non-contact metal shields provide protection against dust and coarse contaminants while retaining factory-applied lubricant with relatively low friction.
Contact rubber seals provide stronger protection against moisture and fine contamination, making 2RS suitable for more demanding environments.
With a 40 × 80 × 18 mm size, 29.1 kN dynamic load rating and 8,700 r/min grease lubrication speed according to CXJSD specifications, the 6208 is well suited to continuously rotating industrial equipment.
Supports motor shafts during continuous rotation while carrying radial loads and moderate axial loads.
Supports rotating shafts and helps maintain smooth, low-friction operation under continuous rotational loads.
Supports pump and compressor shafts while carrying radial loads and moderate axial forces during operation.
Supports input, intermediate and output shafts while helping maintain shaft positioning and reduce friction.
Used in conveyor rollers, pulleys and drive shafts for continuously rotating material-handling equipment.
Verified feedback from procurement teams and distributors who have ordered this part — shown as submitted, with supplier replies where given.
For a bulk 6208 bearing order, dimensional consistency, packaging and documentation are important because the bearings are installed across multiple pieces of rotating equipment.
For industrial motor applications, buyers typically compare the 6208 load rating, lubrication speed, clearance and seal configuration before approving a replacement bearing.
For applications exposed to dust or moisture, the choice between 6208-ZZ and 6208-2RS is an important part of the purchasing decision because sealing affects contamination protection and running friction.
Selected videos covering 6208 deep groove ball bearing structure, mounting and comparison with other bearing types.
Answers to common questions from engineers, distributors and industrial buyers evaluating the 6208 deep groove ball bearing, including dimensions, configurations, load ratings and replacement considerations.
The standard 6208 deep groove ball bearing measures 40 mm in bore diameter, 80 mm in outside diameter, and 18 mm in width. These boundary dimensions are standardized, so a standard 6208 from different manufacturers should share the same 40 × 80 × 18 mm envelope, although load ratings, clearance, seals, cage design, and speed ratings may differ.
_1789118589_WNo_900d429.jpg)
The basic dimensions are the same, but the protection is different: an open 6208 has no shields or seals, 6208-ZZ uses metal shields for dust protection with relatively low friction, while 6208-2RS uses rubber contact seals to provide better protection against dust and moisture but generally introduces more sealing friction and a lower allowable speed.
_1789118607_WNo_900d429.jpg)
The load capacity depends on the manufacturer and bearing configuration; for example, NSK lists a basic dynamic load rating of 32 kN and a basic static load rating of 17.9 kN for its 6208 C3, while other manufacturers publish different values, so buyers should use the exact manufacturer's datasheet rather than assuming every 6208 has identical load ratings.
_1789118620_WNo_900d429.jpg)
There is no single universal maximum RPM for every 6208 because allowable speed depends on the manufacturer, lubrication, cage, seal or shield configuration, load, and operating temperature; for example, NSK lists 9,500 min⁻¹ with grease and 12,000 min⁻¹ with oil for its 6208 C3, so the manufacturer's specific speed rating should always be checked before high-speed operation.
_1789118686_WNo_900d429.jpg)
For applications exposed to moisture, washdown, or significant contamination, 6208-2RS is generally the more protective choice because its rubber contact seals provide stronger exclusion of dust and moisture; 6208-ZZ uses non-contact metal shields and can be preferable when lower friction and higher speed are more important than maximum sealing protection.
