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

NSK Bearings Cylindrical Roller Bearings N306W

Product Overview

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Cylindrical Roller Bearings/Bearings

N306W

Cylindrical Roller Bearing

NSK Distributor Taiwan

Bore d30 mm
Width B19 mm

Product Features

NSK cylindrical roller bearing (N306 series), model N306W: 30 mm bore, 72 mm OD, 19 mm width, N type, W pressed-steel cage
Basic dynamic load rating Cr 47.5 kN, basic static load rating C0r 35 kN (NSK official catalog)
Limiting speed approx. 7100 min⁻¹ (grease), 8500 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 Description

The N306W is an NSK cylindrical roller bearing from the N306 series (N type): 30 mm bore, 72 mm outer diameter, 19 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 47.5 kN and basic static load rating C0r is 35 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	N306W
Series	-	N306 series (N type)
Bore d	mm	30
Outer diameter D	mm	72
Width B	mm	19
Min. chamfer r	mm	1.1
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	47.5
Basic static load rating C0r	kN	35
Limiting speed (grease)	min⁻¹	7100
Limiting speed (oil)	min⁻¹	8500

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 N306W 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 N306W to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Cylindrical Roller Bearings・N306 series (N type)

N213W N214W N215W N216W N217W N218W N219W N220W N304W N305WN306W（This page）N307W N308W N309W N310W N311W N312W N313W N314W N315W N316W

View All Cylindrical Roller Bearings Models →