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

NSK Bearings Spherical Roller Bearings 21315

Product Overview

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Spherical Roller Bearings/Bearings

21315

Spherical Roller Bearing

Bore d75 mm
Width B37 mm

Product Features

NSK spherical roller bearing (21315 series), model 21315: 75 mm bore, 160 mm OD, 37 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 310 kN, basic static load rating C0r 325 kN (NSK official catalog; current-generation equivalent 21315EAE4, Cr/C0r figures above are taken from that higher-capacity current design)
Thermal speed rating approx. 4000 min⁻¹, limiting speed (grease) approx. 3200 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	21315
Series	-	21315 series
Bore d	mm	75
Outer diameter D	mm	160
Width B	mm	37
Min. chamfer r	mm	2.1
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	310
Basic static load rating C0r	kN	325
Thermal speed rating	min⁻¹	4000
Limiting speed (grease)	min⁻¹	3200

Product Description

The 21315 is an NSK spherical roller bearing from the 21315 series: 75 mm bore, 160 mm outer diameter, 37 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 310 kN and basic static load rating C0r is 325 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 21315EAE4, 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.