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SKF 6211/C3 Open Deep Groove Ball Bearing
The SKF 6211/C3 is an open single row deep groove ball bearing designed for smooth rotation and effective support of rotating shafts in industrial machinery. It accommodates radial loads and axial loads in both directions while maintaining low friction. Its increased internal clearance makes it suitable for assemblies where C3 clearance is specified.
Design and Construction
The SKF 6211/C3 features a single row of steel balls running between deep raceway grooves. A sheet metal cage separates and guides the rolling elements during rotation.
Its bearing steel construction provides strength and effective load support under suitable operating conditions. With dimensions of 55x100x21mm, it offers a smaller outside diameter and narrower profile than the 6311 series while retaining the same 55mm bore.
C3 Internal Clearance and Open Design
The bearing features C3 radial internal clearance, which is greater than normal clearance. This helps compensate for reductions in operating clearance caused by interference fits and temperature differences between the bearing rings.
Its open design without seals or shields allows grease or oil to reach the rolling elements directly. Suitable external sealing may be necessary to protect against contamination and lubricant loss.
Applications
The SKF 6211/C3 can be considered for rotating machinery where its dimensions and increased internal clearance meet the operating requirements.
Industrial electric motors
Pumps and fluid handling equipment
Industrial fans and blowers
Conveyor drive assemblies
Gearboxes and mechanical transmissions
General industrial rotating machinery
Benefits
The SKF 6211/C3 offers several practical advantages.
C3 Internal Clearance: Helps accommodate reductions in operating clearance caused by interference fits and temperature differences.
Low Friction: Supports efficient shaft rotation while helping reduce mechanical energy losses.
Combined Load Support: Accommodates radial loads and axial loads in both directions.
Compact Bearing Profile: Offers a smaller outside diameter than the 6311 series for assemblies designed around the 6211 dimensions.
High Speed Capability: Its deep groove construction supports relatively high rotational speeds with appropriate lubrication.
Flexible Lubrication: Open construction allows direct grease or oil lubrication.
Bearing Selection
Before purchasing, confirm that the 55x100x21mm dimensions and C3 radial internal clearance match your equipment requirements.
Check operating loads and speeds alongside shaft and housing fits. Lubrication and exposure to contamination should also be considered.
If normal internal clearance is required, the SKF 6211 may be more suitable. For applications requiring integrated sealing, check the corresponding sealed or shielded SKF 6211 variants.
