L
o
a
d
i
n
g
.
.
.

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

NSK Bearings Cylindrical Roller Bearings N318W

Product Overview

L
o
a
d
i
n
g
.
.
.

Cylindrical Roller Bearings/Bearings

N318W

Cylindrical Roller Bearing

NSK Distributor Taiwan

Bore d90 mm
Width B43 mm

Product Features

NSK cylindrical roller bearing (N318 series), model N318W: 90 mm bore, 190 mm OD, 43 mm width, N type, W pressed-steel cage
Basic dynamic load rating Cr 295 kN, basic static load rating C0r 265 kN (NSK official catalog)
Limiting speed approx. 2600 min⁻¹ (grease), 3000 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

Quantity

Quick Inquiry

Call UsEmail UsChat on LINE Contact Us About This Product

Product Description

The N318W is an NSK cylindrical roller bearing from the N318 series (N type): 90 mm bore, 190 mm outer diameter, 43 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 295 kN and basic static load rating C0r is 265 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.

Product Specifications

Specification	Unit	N318W
Series	-	N318 series (N type)
Bore d	mm	90
Outer diameter D	mm	190
Width B	mm	43
Min. chamfer r	mm	3
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	295
Basic static load rating C0r	kN	265
Limiting speed (grease)	min⁻¹	2600
Limiting speed (oil)	min⁻¹	3000

FAQ

What's the difference between the Z, ZZ and DDU suffixes?

Z means a single-side steel shield, ZZ means steel shields on both sides, and DDU means contact rubber seals on both sides. Shields suit general environments and high speeds; rubber seals give better dust and water protection with slightly higher friction torque — choose based on your dust exposure and lubrication method.

When should I choose C3 clearance instead of standard clearance?

For motors or other applications with noticeable temperature rise, or high-speed operation, the inner ring expands from heat and reduces the clearance — choose C3 in that case. Standard clearance is fine for general room-temperature, low-speed use. See Nahshon's technical resources for a clearance selection guide.

Is N318W in stock in Taiwan? What is the lead time?

Nahshon is the NSK distributor in Taiwan and keeps stock of some commonly used items. Add N318W to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Cylindrical Roller Bearings・N318 series (N type)

N308W N309W N310W N311W N312W N313W N314W N315W N316W N317WN318W（This page）N319W N320W NF204W NF205W NF206W NF207W NF208W NF209W NF210W NF211W

View All Cylindrical Roller Bearings Models →