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

NSK Bearings Cylindrical Roller Bearings NU320W

Product Overview

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Cylindrical Roller Bearings/Bearings

NU320W

Cylindrical Roller Bearing

NSK Distributor Taiwan

Bore d100 mm
Width B47 mm

Product Features

NSK cylindrical roller bearing (NU320 series), model NU320W: 100 mm bore, 215 mm OD, 47 mm width, NU type, W pressed-steel cage
Basic dynamic load rating Cr 365 kN, basic static load rating C0r 335 kN (NSK official catalog)
Limiting speed approx. 2200 min⁻¹ (grease), 2800 min⁻¹ (oil)
no ribs on inner ring, two ribs on outer ring; inner 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 Description

The NU320W is an NSK cylindrical roller bearing from the NU320 series (NU type): 100 mm bore, 215 mm outer diameter, 47 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 365 kN and basic static load rating C0r is 335 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	NU320W
Series	-	NU320 series (NU type)
Bore d	mm	100
Outer diameter D	mm	215
Width B	mm	47
Min. chamfer r	mm	3
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	365
Basic static load rating C0r	kN	335
Limiting speed (grease)	min⁻¹	2200
Limiting speed (oil)	min⁻¹	2800

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 NU320W 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 NU320W to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.