Ciurxk Bearings Research & Solutions S.R.L
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  • Factory Address20031 Cormano MI - Via dell' industria, 13
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Double row spherical roller bearings

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Double row tapered roller bearings in the TDO  and TDI designs, in many variants and with different features. Depending on the design, these bearings can accommodate heavy radial loads, axial loads in both directions and have a high degree of stiffness. Double row tapered roller bearings are typically used in gearboxes, hoisting equipment, rolling mills and machines in the mining industry, e.g. tunnelling machines.

Double row tapered roller bearings features

High load carrying capacity

Because of their second row of rollers, double row tapered roller bearings are suitable for heavy radial and axial loads. The axial load carrying capacity of tapered roller bearings increases with increasing contact angle α. The size of the contact angle, which is usually between 10° and 30°, is related to the calculation factor e (→ product tables): the larger the value of e, the larger the contact angle.
Axial loads in both directions
Double row tapered roller bearings locate the shaft in both directions with a specific axial clearance or preload. 

High stiffness

Double row tapered roller bearings provide a stiff bearing arrangement.

Low friction

The optimized roller end design and surface finish on the flange (fig. 3) promote lubricant film formation, resulting in lower friction. This also reduces frictional heat and flange wear. In addition, the bearings can better maintain preload and run at reduced noise levels.

Long service life

The crowned raceway profiles of basic design bearings and the logarithmic raceway profiles of SKF Explorer bearings optimize the load distribution along the contact surfaces, reduce stress peaks at the roller ends (fig. 4), and reduce the sensitivity to misalignment and shaft deflection compared with conventional straight raceway profiles

Enhanced operational reliability

Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
Consistency of roller profiles and sizes
The rollers incorporated in SKF double row tapered roller bearings are manufactured to such close dimensional and geometrical tolerances that they are practically identical. This provides optimal load distribution, reduces noise and vibration, and enables preload to be set more accurately.

100 mm x 180 mm x 60.3 mm Radial clearance class SNR 23220EMKW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23220EMKW33C4 1pcs

190 mm x 340 mm x 120 mm Static load, C0 SNR 23238EMW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23238EMW33C4 1pcs

150 mm x 250 mm x 80 mm Brand SNR 23130.EMKW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23130.EMKW33C4 1pcs

340 mm x 580 mm x 190 mm rs min SNR 23168EMW33 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23168EMW33 1pcs

120 mm x 215 mm x 76 mm Min operating temperature, Tmin SNR 23224.EMKW33C3 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23224.EMKW33C3 1pcs

200 mm x 310 mm x 82 mm Characteristic inner ring frequency, BPFI SNR 23040.EMKW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23040.EMKW33C4 1pcs

200 mm x 360 mm x 128 mm Nref SNR 23240EMKW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
23240EMKW33C4 1pcs

95 mm x 170 mm x 43 mm Max operating temperature, Tmax SNR 22219EMKW33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
22219EMKW33C4 1pcs

55 mm x 120 mm x 43 mm Static load, C0 SNR 22311.EG15W33C4 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
22311.EG15W33C4 1pcs

75 mm x 160 mm x 55 mm Y1 SNR 22315.EG15KW33C3 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
22315.EG15KW33C3 1pcs

190 mm x 340 mm x 92 mm d SNR 22238.EMW33 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
22238.EMW33 1pcs

90 mm x 160 mm x 40 mm Number of lubrication holes SNR 22218.EAW33C3 Double row spherical roller bearings

SNR ISO9001,CE,CO,CQ
22218.EAW33C3 1pcs
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