For 2311M, is a widespread type of SKF unsealed self-aligning ball bearings with a cylindrical bore, which these bearings are particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Therefore these self-aligning ball bearings play a very important role in civil engineering machinery, textile machinery transmission shaft, etc.

In there, please pay attention to SKF bearings 2311M technical data in the following,  

 
d: 55mm
D: 120mm
B: 43mm...

SKF Explorer 21313E----Spherical roller bearing, with cylindrical bore, unsealed, which made in Malaysia. Spherical roller bearings are mainly used in the paper-making machinery, deceleration devices, railway rolling stock axles, rolling mill gear box seats, crushing machines, vibrating screen, printing machinery and woodworking machinery, etc.

Description of SKF bearings 21313 E technical data in the following:

    
d: 65 mm
D:140 mm
B: 33 mm
M: 2.55 kg
Basic dynamic load rating,  C:    236KN   ...

SKF 29416E Spherical roller thrust bearings with a pressed steel window-type cage which with the rollers, forms a non-separable assembly with the shaft washer, which have self aligning ability as such will tolerate misalignment and deal with both axial and radial loads simultaneously. And they can support very heavy axial loads and permit relatively high speed operation.

For convenience, the SKF bearings 29416E technical data is shown below:

   
d: 80 mm
D:170 mm
B:54 mm
M: 5.6 kg
Basic dynamic lo...

54306 is the most common size SKF thrust ball bearings double direction, which consist of one shaft washer, two housing washers and two balls and cage thrust assemblies. The bearings are separable so that mounting is simple, and they can accommodate axial loads acting in both directions and can thus serve to axially locate a shaft in both directions.

More details we can learn from SKF bearings 54306 in the following: 
   
d: 26mm
D: 60mm
B: 46mm
M: 0.58 kg
C : Basic dynamic load rating,  37.7 KN ...

SKF 53214 is designed for supporting axial load, single direction, sphered housing washer, U 214 is a sphered seat washer, thrust ball bearings usually consist of a shaft washer, a housing washer and a ball and a cage thrust assembly. And these bearings can accommodate axial loads in one direction and thus locate a shaft axially in one direction.

For details, please see the SKF bearings 53214+U 214 product data as below,

   
d: 70 mm
D:105 mm
B: 32 mm
M: 0.97kg
Basic dynamic load rating,  C:    ...

SKF 7326 BM angular contact ball bearings, made in Austria SKF Plant, single row, with pressed window-type brass cage, ball centred. The bearings with suffix B indicate it have the 40 degree contact angle. And these single row ball bearings can accommodate axial loads acting in one direction only.

We can get further information form SKF bearings 7326 BM characteristics below:
   
d: 130mm
D: 280mm
B: 58mm
M: 0.15 kg
C : Basic dynamic load rating,  296 KN  
C0: Basic static load rating,  305 KN   ...

SKF Explorer bearing 6208 N/C3 is also know as deep groove ball bearings, single row, with a snap ring groove, unsealed, and the SP 80 is a snap ring, which these bearings can simplify arrangement design as the bearings can be axially located in the housing by a snap (or retaining) ring. This saves space.

For convenience, SKF bearings 6208 N/C3 technical data in the following:
   
d: 40 mm
D: 80 mm
B: 18 mm
M: 0.37 kg
Basic dynamic load rating,  C:   32.5 KN  
Basic static load rating ,    Co:   ...

SKF 313893 is an ordinary cylindrical roller bearing, four-row, BC4.1, which has two outer rings each with three integral flanges, one inner ring. Two rollers guided double pronged machined brass cages. This type of bearing is designed with or without annular groove and/or lubrication holes in the outer rings. And these SKF bearings they are used almost exclusively for the roll necks of rolling mill stands, calendars and roller presses

We can get to know the details of SKF 313893 from its te...