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

NSK Bearings Spherical Roller Bearings 21314K

Product Overview

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Spherical Roller Bearings/Bearings

21314K

Spherical Roller Bearing

NSK Distributor Taiwan

Bore d70 mm
Width B35 mm

Product Features

NSK spherical roller bearing (21314 series), model 21314K: 70 mm bore, 150 mm OD, 35 mm width, tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr 310 kN, basic static load rating C0r 325 kN (NSK official catalog; current-generation equivalent 21314EAKE4, Cr/C0r figures above are taken from that higher-capacity current design)
Thermal speed rating approx. 4300 min⁻¹, limiting speed (grease) approx. 3200 min⁻¹
Double-row rollers on a spherical outer raceway self-align for misalignment and shaft deflection — suited to long shafts and 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 21314K is an NSK spherical roller bearing from the 21314 series: 70 mm bore, 150 mm outer diameter, 35 mm width, tapered bore (K, 1:12 taper). Basic dynamic load rating Cr is 310 kN and basic static load rating C0r is 325 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 21314EAKE4, Cr/C0r figures above are taken from that higher-capacity current design). Spherical roller bearings use double-row rollers on a spherical outer raceway that self-aligns for misalignment and shaft deflection while carrying heavy radial and bidirectional axial loads — common in gear reducers, conveyor rollers, paper machinery and wind-turbine main shafts.

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	21314K
Series	-	21314 series
Bore d	mm	70
Outer diameter D	mm	150
Width B	mm	35
Min. chamfer r	mm	2.1
Bore type	-	tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr	kN	310
Basic static load rating C0r	kN	325
Thermal speed rating	min⁻¹	4300
Limiting speed (grease)	min⁻¹	3200

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 21314K 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 21314K to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Spherical Roller Bearings・21314 series

21309K 21310 21310K 21311 21311K 21312 21312K 21313 21313K 2131421314K（This page）21315 21315K 21316 21316K 21317 21317K 21318 21318K 22205 22206

View All Spherical Roller Bearings Models →