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

NSK Bearings Cylindrical Roller Bearings N308W

Product Overview

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Cylindrical Roller Bearings/Bearings

N308W

Cylindrical Roller Bearing

Bore d40 mm
Width B23 mm

Product Features

NSK cylindrical roller bearing (N308 series), model N308W: 40 mm bore, 90 mm OD, 23 mm width, N type, W pressed-steel cage
Basic dynamic load rating Cr 72 kN, basic static load rating C0r 57 kN (NSK official catalog)
Limiting speed approx. 5600 min⁻¹ (grease), 6700 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	N308W
Series	-	N308 series (N type)
Bore d	mm	40
Outer diameter D	mm	90
Width B	mm	23
Min. chamfer r	mm	1.5
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	72
Basic static load rating C0r	kN	57
Limiting speed (grease)	min⁻¹	5600
Limiting speed (oil)	min⁻¹	6700

Product Description

The N308W is an NSK cylindrical roller bearing from the N308 series (N type): 40 mm bore, 90 mm outer diameter, 23 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 72 kN and basic static load rating C0r is 57 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.