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

NSK Bearings Spherical Roller Bearings 21317

Product Overview

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Spherical Roller Bearings/Bearings

21317

Spherical Roller Bearing

Bore d85 mm
Width B41 mm

Product Features

NSK spherical roller bearing (21317 series), model 21317: 85 mm bore, 180 mm OD, 41 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 360 kN, basic static load rating C0r 395 kN (NSK official catalog; current-generation equivalent 21317EAE4, 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	21317
Series	-	21317 series
Bore d	mm	85
Outer diameter D	mm	180
Width B	mm	41
Min. chamfer r	mm	3
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	360
Basic static load rating C0r	kN	395
Thermal speed rating	min⁻¹	3800
Limiting speed (grease)	min⁻¹	3000

Product Description

The 21317 is an NSK spherical roller bearing from the 21317 series: 85 mm bore, 180 mm outer diameter, 41 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 360 kN and basic static load rating C0r is 395 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 21317EAE4, 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.