L
o
a
d
i
n
g
.
.
.

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

NSK Bearings Spherical Roller Bearings 21309K

Product Overview

L
o
a
d
i
n
g
.
.
.

Spherical Roller Bearings/Bearings

21309K

Spherical Roller Bearing

Bore d45 mm
Width B25 mm

Product Features

NSK spherical roller bearing (21309 series), model 21309K: 45 mm bore, 100 mm OD, 25 mm width, tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr 149 kN, basic static load rating C0r 144 kN (NSK official catalog; current-generation equivalent 21309EAKE4, Cr/C0r figures above are taken from that higher-capacity current design)
Thermal speed rating approx. 6000 min⁻¹, limiting speed (grease) approx. 5000 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

Quantity

Quick Inquiry

Call Us Email Us Contact Us About This Product

Product Specifications

Specification	Unit	21309K
Series	-	21309 series
Bore d	mm	45
Outer diameter D	mm	100
Width B	mm	25
Min. chamfer r	mm	1.5
Bore type	-	tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr	kN	149
Basic static load rating C0r	kN	144
Thermal speed rating	min⁻¹	6000
Limiting speed (grease)	min⁻¹	5000

Product Description

The 21309K is an NSK spherical roller bearing from the 21309 series: 45 mm bore, 100 mm outer diameter, 25 mm width, tapered bore (K, 1:12 taper). Basic dynamic load rating Cr is 149 kN and basic static load rating C0r is 144 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 21309EAKE4, 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.