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Product Series of Automation-Related Precision Ball Screws and Linear Rails – High-Precision Ball Screws

NSK Bearings Spherical Roller Bearings 22311

Product Overview

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Spherical Roller Bearings/Bearings

22311

Spherical Roller Bearing

Bore d55 mm
Width B43 mm

Product Features

NSK spherical roller bearing (22311 series), model 22311: 55 mm bore, 120 mm OD, 43 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 292 kN, basic static load rating C0r 292 kN (NSK official catalog; current-generation equivalent 22311EAE4, Cr/C0r figures above are taken from that higher-capacity current design)
Thermal speed rating approx. 4300 min⁻¹, limiting speed (grease) approx. 3800 min⁻¹
Double-row rollers on a spherical outer raceway self-align for misalignment and shaft deflection — suited to long shafts and heavy-duty drives
Nahshon is NSK's distributor in Taiwan — add the part number to your inquiry list

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Product Specifications

Specification	Unit	22311
Series	-	22311 series
Bore d	mm	55
Outer diameter D	mm	120
Width B	mm	43
Min. chamfer r	mm	2
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	292
Basic static load rating C0r	kN	292
Thermal speed rating	min⁻¹	4300
Limiting speed (grease)	min⁻¹	3800

Product Description

The 22311 is an NSK spherical roller bearing from the 22311 series: 55 mm bore, 120 mm outer diameter, 43 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 292 kN and basic static load rating C0r is 292 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 22311EAE4, Cr/C0r figures above are taken from that higher-capacity current design). Spherical roller bearings use double-row rollers on a spherical outer raceway that self-aligns for misalignment and shaft deflection while carrying heavy radial and bidirectional axial loads — common in gear reducers, conveyor rollers, paper machinery and wind-turbine main shafts.

Inquiries & customization

Add this part number to your inquiry list — Nahshon is NSK's distributor in Taiwan and works directly with the factory to confirm specifications, stock and pricing.