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

NSK Bearings Cylindrical Roller Bearings N312W

Product Overview

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Cylindrical Roller Bearings/Bearings

N312W

Cylindrical Roller Bearing

NSK Distributor Taiwan

Bore d60 mm
Width B31 mm

Product Features

NSK cylindrical roller bearing (N312 series), model N312W: 60 mm bore, 130 mm OD, 31 mm width, N type, W pressed-steel cage
Basic dynamic load rating Cr 152 kN, basic static load rating C0r 126 kN (NSK official catalog)
Limiting speed approx. 3800 min⁻¹ (grease), 4500 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 N312W is an NSK cylindrical roller bearing from the N312 series (N type): 60 mm bore, 130 mm outer diameter, 31 mm width, W pressed-steel cage. Basic dynamic load rating Cr is 152 kN and basic static load rating C0r is 126 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	N312W
Series	-	N312 series (N type)
Bore d	mm	60
Outer diameter D	mm	130
Width B	mm	31
Min. chamfer r	mm	2.1
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	152
Basic static load rating C0r	kN	126
Limiting speed (grease)	min⁻¹	3800
Limiting speed (oil)	min⁻¹	4500

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 N312W 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 N312W to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Cylindrical Roller Bearings・N312 series (N type)

N219W N220W N304W N305W N306W N307W N308W N309W N310W N311WN312W（This page）N313W N314W N315W N316W N317W N318W N319W N320W NF204W NF205W

View All Cylindrical Roller Bearings Models →