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

NSK Bearings Spherical Roller Bearings 21316

Product Overview

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Spherical Roller Bearings/Bearings

21316

Spherical Roller Bearing

Bore d80 mm
Width B39 mm

Product Features

NSK spherical roller bearing (21316 series), model 21316: 80 mm bore, 170 mm OD, 39 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 355 kN, basic static load rating C0r 375 kN (NSK official catalog; current-generation equivalent 21316EAE4, Cr/C0r figures above are taken from that higher-capacity current design)
Thermal speed rating approx. 3800 min⁻¹, limiting speed (grease) approx. 3000 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	21316
Series	-	21316 series
Bore d	mm	80
Outer diameter D	mm	170
Width B	mm	39
Min. chamfer r	mm	2.1
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	355
Basic static load rating C0r	kN	375
Thermal speed rating	min⁻¹	3800
Limiting speed (grease)	min⁻¹	3000

Product Description

The 21316 is an NSK spherical roller bearing from the 21316 series: 80 mm bore, 170 mm outer diameter, 39 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 355 kN and basic static load rating C0r is 375 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 21316EAE4, 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.