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

NSK Bearings Cylindrical Roller Bearings N309W

Product Overview

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Cylindrical Roller Bearings/Bearings

N309W

Cylindrical Roller Bearing

Bore d45 mm
Width B25 mm

Product Features

NSK cylindrical roller bearing (N309 series), model N309W: 45 mm bore, 100 mm OD, 25 mm width, N type, W pressed-steel cage
Basic dynamic load rating Cr 97 kN, basic static load rating C0r 77.5 kN (NSK official catalog)
Limiting speed approx. 5000 min⁻¹ (grease), 6000 min⁻¹ (oil)
no ribs on outer ring, two ribs on inner ring; outer ring can float axially, no axial load capacity; line contact between rollers and raceways gives high radial load capacity and low friction, suited to high-speed 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	N309W
Series	-	N309 series (N type)
Bore d	mm	45
Outer diameter D	mm	100
Width B	mm	25
Min. chamfer r	mm	1.5
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	97
Basic static load rating C0r	kN	77.5
Limiting speed (grease)	min⁻¹	5000
Limiting speed (oil)	min⁻¹	6000

Product Description

The N309W is an NSK cylindrical roller bearing from the N309 series (N type): 45 mm bore, 100 mm outer diameter, 25 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 97 kN and basic static load rating C0r is 77.5 kN (NSK official catalog CAT. No. E1103d). Cylindrical roller bearings use line contact between rollers and raceways for high radial load capacity and low friction — suited to high-speed, heavy-duty drives such as gear reducers, motors and machine-tool spindles.

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.