_1788256344_WNo_800d800.jpg)
Image may differ from product. See technical specification for details.
6211 Deep Groove Ball Bearing is a single-row deep groove ball bearing with a 55 mm bore, 100 mm outside diameter, and 21 mm width. As a standard 62-series bearing, the 6211 is designed for general-purpose radial applications and can also accommodate axial loads in both directions. The standard open 6211 is available with a high-carbon chrome steel construction, while sealed and shielded variants are also available depending on the application requirements. Its standardized dimensions make the 6211 suitable for a wide range of industrial machinery and rotating equipment where reliable radial and axial load support is required.
The 6211 is a standard 62-series deep groove ball bearing with a 55 mm bore, 100 mm outside diameter and 21 mm width. The values below are based on the standard 6211 reference configuration.
| Parameter | Metric | Imperial |
|---|---|---|
| Bore diameter (d) | 55 mm | 2.1654 in |
| Outside diameter (D) | 100 mm | 3.9370 in |
| Width (B) | 21 mm | 0.8268 in |
| Basic dynamic load rating (Cr) | 47.5 kN | 10,679 lbf |
| Basic static load rating (C0r) | 29.3 kN | 6,587 lbf |
| Reference speed — grease | 7,500 rpm | — |
| Reference speed — oil bath | 9,000 rpm | — |
| Minimum shaft abutment diameter (da min) | 63 mm | 2.4803 in |
| Maximum housing abutment diameter (Da max) | 92 mm | 3.6220 in |
| Maximum fillet radius (ra max) | 1.5 mm | 0.0591 in |
| Number of balls | 10 | — |
| Ball diameter | 14.288 mm | 0.5625 in |
| Weight | 0.619 kg | 1.365 lb |
The 6211 uses a single-row deep groove raceway design. Its inner ring, outer ring, steel balls and cage work together to support radial loads and axial loads in both directions while maintaining smooth rotation.
_1789976221_WNo_523d523.jpg)
55 mm bore, providing the shaft mounting surface and an internal raceway that guides the rolling elements.
100 mm outside diameter, with a deep raceway that supports the rolling elements together with the inner ring.
The standard 6211 contains 10 steel balls with a 14.288 mm diameter. They transfer radial and axial loads through rolling contact.
The pressed steel cage spaces and guides the balls around the raceway to maintain controlled rolling motion.
Deep circular-arc raceways provide rolling contact and support radial and axial loads in both directions.
A minimum 1.5 mm chamfer provides edge clearance and helps prevent interference during mounting and fitting.
Raceways are exposed on both sides. The open configuration is suitable where relubrication and a relatively clean operating environment are required.
Metal shields on both sides help reduce the entry of dust and coarse contaminants while retaining factory-applied grease.
Rubber seals on both sides provide improved protection against moisture and fine contaminants for applications requiring additional sealing.
With a 55 mm bore, 100 mm outside diameter and 21 mm width, the 6211 is commonly used where rotating shafts require reliable radial load support together with axial load capacity in both directions.
Supports rotating shafts and handles radial and axial loads in both directions in electrical machinery.
Provides stable shaft support and accommodates radial and axial loads during continuous rotation.
Supports rotating shafts exposed to combined radial and axial loading in power transmission systems.
Supports rotating components under continuous radial loading in conveyors and material handling systems.
Supports low-friction shaft rotation where stable operation, rotational speed and low vibration are important.
Feedback from procurement teams and distributors who have ordered this part — shown as submitted, with supplier replies where given.
The 6211 bearing dimensions matched our shaft and housing requirements exactly, and the batch remained consistent across all 2,000 pieces. The bearings arrived with complete documentation and were ready for assembly.
The 6211 bearing sample arrived within the quoted lead time, and communication throughout the order was clear. We are preparing the production order after completing our engineering inspection.
We ordered 6211 deep groove ball bearings for rotating equipment and found the quality consistent across three orders. The bearings provided smooth operation and met our dimensional requirements.
Watch these 6211 deep groove ball bearing videos to compare 2Z metal-shielded, 2RS rubber-sealed and open configurations.
Answers to common questions from engineers and buyers evaluating the 6211 — including dimensions, load ratings, speed, clearance, sealing and replacement considerations.
_1789971015_WNo_900d429.jpg)
The standard 6211 has a 55 mm bore, 100 mm outside diameter and 21 mm width. When selecting a replacement, also confirm the seal or shield configuration, radial internal clearance and precision class rather than checking dimensions alone.
_1789971032_WNo_900d429.jpg)
For the referenced NSK 6211 configuration, the basic dynamic load rating Cr is 47.5 kN and the basic static load rating C0r is 29.3 kN. Actual suitability depends on the applied loads, speed, lubrication, mounting conditions and required service life.
For the referenced NSK 6211 configuration, the grease reference speed is 7,500 rpm and the oil-bath reference speed is 9,000 rpm. Actual allowable speed can vary with bearing configuration, load, lubrication, temperature and application conditions.
_1789971061_WNo_900d429.jpg)
Common causes include excessive speed or load, insufficient or unsuitable lubrication, incorrect radial internal clearance, contamination, improper mounting, excessive interference fit, misalignment or damage to the raceways and rolling elements.
The basic boundary dimensions remain 55 × 100 × 21 mm, but a 6211 C3 has greater radial internal clearance than the normal-clearance version. C3 clearance may be appropriate for certain higher-temperature applications or interference fits where additional thermal expansion clearance is required; it should not be selected automatically for every application.
