The 7211B bearing is a widely used single-row angular contact ball bearing, belonging to the 7200 series with standardized dimensions and stable performance. The suffix “B” indicates a contact angle of 40°, giving it excellent ability to withstand axial loads in one direction and combined radial loads simultaneously. With its balanced structure and reliable operation, it has become a standard component in gearboxes, pumps, fans, machine tools and general industrial transmission equipment.
Basic Dimensions and Structure
As a metric series bearing, the 7211B bearing follows ISO standard dimensions:
Inner diameter (d): 55 mm
Outer diameter (D): 100 mm
Width (B): 21 mm
Structurally, it consists of an inner ring, outer ring, steel balls, cage, and usually contact seals or shields depending on the variant. The 40° contact angle is designed to resist significant axial thrust, which distinguishes it from smaller contact angle bearings such as C (15°) or AC (25°) types. This makes the 7211B bearing particularly suitable for applications with high axial loading and tilting moments.
Key Performance Characteristics
High Axial Load Capacity
The 40° contact angle enables the bearing to support substantial axial forces in a single direction. For applications requiring bidirectional axial support, 7211B bearing is often mounted in pairs, either back-to-back (DB), face-to-face (DF), or in tandem (DT) arrangements.
Radial and Combined Load Support
In addition to axial loads, the bearing effectively carries radial loads and can operate under combined loading conditions commonly found in rotating machinery. This versatility supports its use in a wide range of industrial equipment.
Moderate Speed Performance
Although designed more for heavy loading than extremely high speeds, the 7211B bearing performs reliably at medium to moderately high rotational speeds. Proper lubrication significantly extends its service life and improves high-speed stability.
Rigidity and Tilt Resistance
Compared with deep groove ball bearings, angular contact ball bearings like the 7211B bearing offer higher rigidity and better resistance to tilting moments, making them suitable for precision transmission and machine tool spindle auxiliary supports.
Typical Applications
Due to its strong load-bearing capacity and standard size, the 7211B bearing is extensively used in:
Reducers, gearboxes and transmission assemblies
Centrifugal pumps, fans and blowers
Machine tool spindles, lathes and milling machines
Agricultural machinery and construction equipment
Motors, compressors and textile machinery
Conveyor systems and material handling units
 |
| If you need any brand bearings or any models of bearings, please contact me!Contact: Grace Email: ntn@llhbearing.com Skype:+8618668903871 MP/Whatsapp: +8618668903871 Wechat:GraceXu1234 |
Jinan Maolei Bearing Co.,Ltd. is china plain bearing supplier for high performance spherical plai...
Miniature ss bearings have many advantages compared with ordinary bearings.Miniature ss bearings ...
sealed ceramic bearings are more and more popular in recent years,they have many advantages compa...
Plastic POM bearing may be usually divided into plastic rolling bearings and plastic slippy beari...
An anti friction bearing that operates below slippery friction.The anti friction bearing works sw...
The clutch pilot bearing is that the 1st shaft guide bearing of the transmission.Between the engi...
Many people do not know the secret of hybrid ceramic balls bearings A. the rolling bearing consis...
Nylon bearings material with smart mechanical strength and wear resistance , appropriate for the ...
ntn@llhbearing.com
