Spherical Roller Bearings

The workhorse of industrial bearings. Stocked in standard industrial sizes as well as special designs for "shaker screen" and vibratory applications

Spherical roller bearings (SRB's) find wide use in industry and are typically used in conjunction with Bearing housings.


SRB's have 2 inclined rows of rollers running on a common spherical raceway in the outer ring. This geometry offers very high axial and radial load carry capability in a self-aligning format allowing dynamic misalignments in the order of 1 to 2.5 degrees.

Features of SRB's include:-

  • Steel, brass or polyamide cage designs (depending on manufacturer);
  • Parallel or tapered bore;
  • Sealed and even split designs are available (not common).
  • Normal operating temperature limit of 120 oC, with heat stabilised bearings for higher temperature applications(available to special order).

NBC offers end users a huge range of spherical roller bearings, tapered sleeves, housings and seals for most applications from stock.


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Vibratory screen bearings

"Shaker screen bearings " are a subset of SRB's with specific design features that enable them to resist the harsh operating environment found in vibrating machinery. These include:-

  • Dimensional tolerances restricted to the top 1/2 (bore) or centre 1/2 (outer diameter) of the standard tolerance band to more closely control shaft and housing fits
  • Internal clearance restricted to the top 2/3 of the tolerance band to closely control fitted internal clearance and resultant load distribution.
  • Heat stabilized steel for operation at up to 200 °C 
  • One piece brass cage with symmetrical rollers 

FSQ - Used by large OEM manufacturers of crushing and screening equipment, FSQ Shaker Screen bearings have developed a reputation for reliability


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Spherical roller thrust bearings

SRTB's have a single row of rollers to transfer load from one raceway to the other. They offer very high axial load carrying capacity at high speed while retaining radial load and self-aligning capabilities.

Available in pressed steel and machined brass cage designs.


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Mounted spherical roller bearings

NBC is the official agent for REXNORD LINKBELT bearings in the UK. A premium product, these bearings and mounted bearing units offer ease of installation and excellent seal structures and are are commonly found in the mining and quarrying industries in applications where minimal downtime and increased production availability offset their costs..

The table below indicates popular sizes with their typical load capacity, speed ratings and geometrical constants required for calculation. It is neither definitive nor all encompassing. Variations between manufacturers and differing designs exist.

Spherical roller bearings are usually catalogued to 1400mm bore.

NBC technical staff will gladly assist with calculation, selection. mounting and lubrication advice for specific applications. Ask for advice!


The table below lists the popular sizes, dynamic and static capacity figures as we as limiting speeds for a broad range of SRB's. These figures can vary between manufacturers.

BoreODWidthDynamicStaticLimiting speedWeightCalculation factors
dDBCrCorGreaseOil
mmmmmmKNKNrpmrpmkgeY1Y2Y0
2220525521842.143.58100110000.1860.351.922.861.88
21305621744.943.7560074000.2670.302.263.372.21
2220630622051.755680091000.2940.332.033.021.98
21306721958.360470063000.4060.282.373.532.32
222073572236773.9590078000.4470.332.033.201.98
21307802170.773.3420056000.5470.282.403.582.35
2220840802376.985520069000.5360.292.353.502.30
21308902387.692370050000.7510.272.493.702.43
223089033115127400053001.030.391.752.611.71
2220945852380.591.9490065000.5970.272.503.722.44
2130910025105112330044001.010.262.553.802.50
2230910036146168360048001.430.391.712.541.67
2221050902383.197.8450060000.6410.252.714.042.65
2131011027121129300040001.30.262.613.882.55
2231011040181208320043001.870.381.782.651.74
222115510025102119410054000.8490.262.643.932.58
2131112029141152280037001.660.252.653.952.59
2231112043213248300039002.430.371.802.691.76
222126011028127154370049001.20.252.714.042.65
2131213031165175250034001.990.262.643.932.58
2231213046243284270036003.010.371.802.691.76
222136512031151188340046001.610.272.493.712.43
2131314033186197230031002.450.252.694.002.63
2231314048251291250034003.530.351.922.861.88
222147012531155193320043001.680.242.834.212.77
2131415035206223220029002.980.252.744.082.68
2231415051300362240031004.370.351.952.911.91
222157513031161204310041001.770.252.744.082.68
2131516037249270210027003.630.242.844.232.78
2231516055351437220029005.50.361.872.791.83
222168014033174225290038002.20.223.014.482.94
2131617039272306190026004.290.242.844.232.78
2231617058395496210028006.540.361.872.791.83
222178515036216277270036002.730.232.954.402.89
2131718041297351180024005.190.242.794.152.73
2231718060431539200026007.420.342.013.001.97
222189016040252332250033003.470.232.904.312.83
2321816052.4316453160022004.640.332.073.092.03
2131819043320387170023006.090.242.844.232.78
2231819064486623190025008.870.341.982.941.93
222199517043273359240032004.320.262.643.932.59
2131920045351444170022007.090.232.904.302.80
22319200675346861800230010.40.351.922.861.88
2402010015050242425150020003.150.302.233.322.18
2412016565389632130017005.540.381.772.641.73
2312016552326490170022004.390.312.213.292.16
2222018046317423220030005.10.262.553.802.50
2322018060.3405589150019006.810.332.033.021.98
2132021547382446160020008.440.223.004.503.00
22320215736137991600220013.30.351.912.851.87


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