Spherical Roller Bearings
Spherical Roller Bearings
We are Manufacturer, Supplier, Developer, Service Provider of Spherical Roller Bearings, Roller Bearings and our set up is situated in Kolhapur, Maharashtra, India.
Spherical roller bearings operate in arduous condi-tions. The spherical rollers can be symmetrical or unsym-metrical and are self-aligning in the outer ring sphered raceway. Thus, the possible coaxiality deviations of the supporting bearings as well as shaft bending can be compensated.
Spherical roller bearings are manufactured in the following constructive versions, depending on the bearing size and series:
Spherical Roller Bearings, tables
Spherical Roller Bearings - adapter sleeves tables
Spherical Roller Bearings - withdrawel sleeves tables
These bearings have a central guide rib floating on the inner ring, symmetrical rollers with larger dimensions so that the load carrying capacity increases. Special pressed sheet cage. Bearings of this design are of small and medium sizes.
Other constructive versions are shown below: cylindrical bore
Spherical roller bearings with both cylindrical and tapered bore, are manufactured in normal tolerance class (see page 24).
The main dimensions of spherical roller bearings are in accordance with ISO 15.
The dimensions of the adapter sleeves are in accord-ancewith standard ISO 2982-1.
The dimensions of the safety washers are in accord-ance with standard DIN 5406.
The dimensions of the bearing nuts are in accordance with standard ISO 2982-2.
The dimensions of the withdrawal sleeves are in accordance with standard ISO 2982-1.
Spherical roller bearings allow angular misalignment between the outer ring and inner ring without any in-fluency on the bearing rating life. Under normal loads and operating conditions and when the inner ring rotates, the values of the permissible misalignment depending on the bearing series are given in table 3.
Small and medium size spherical roller bearings are fitted with pressed sheet or machined brass cages (Y). Bearings of normal design are fitted with machined brass or steel cages guided on the rollers (M), inner ring (MB) or outer ring raceway (MA).
Glass fiber reinforced poly amide 6.6 cages are success-fully used for small and medium size bearings if the operating temperature doesn’t exceed +120?C.
Large-size bearings are fitted with machined brass cages, CA design.
Designs and some technical data are given in table 4.
Lubrication grooves and holes
Spherical roller bearings are provided with a lubrication groove and holes in the outer ring, excepting those of series
213. Designation suffix W33 is used to identify this feature on bearings. The dimensions of the groove, bore diameter and their number depending on the dimension series are given in table 5.
Spherical roller bearings with outside diameter D>240 mm of all series given in this cataloger are stress revealed. Therefore, they can be used up to an operating temperature of +200?C.The hardness of the rings should not be lower than 59 HRC. Small sized bearings operate normally at temperatures up to +120?C.
Axial load for bearings mounted on adapter sleeves
If the spherical roller bearings are mounted on a smooth shaft using an adapter sleeve, without side support, the axial load carrying capacity depends on the friction be-tween shaft and sleeve.
Considering that the mounting is correctly done, the permissible axial load can be accurately enough deter-mined using the following equation:
Fa max = 3 Bd, kN
Fa max – maximum permissible axial load, kN,
B – bearing width, mm,
d – bearing bore diameter, mm.
Equivalent dynamic radial load
Pr = Fr + Y1Fa, kN, for Fa/Fr <=e, Pr = 0,67 Fr + Y2Fa, kN, for Fa/Fr >e,
The values of the factors depending on the bearing type can be found in bearing tables
Equivalent static radial load
P0r = Fr + Y0Fa, kN
The value of the factor Yo depending on the bearing type can be found in bearing tables.
For a proper location of bearing rings on the shaft and housing shoulder respectively, shaft (housing) maximum connection radius ru max should be less than bearing minimum mounting chamfer rs min.
Shoulder height should also be properly sized in case of bearing maximum mounting chamfer.
The values of the connection radii and support shoulder height are given in table 6.
The mounting dimensions for bearings with withdrawal sleeves are given in table 7.