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

NSK Bearings Self-Aligning Ball Bearings 2311K

Product Overview

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Self-Aligning Ball Bearings/Bearings

2311K

Self-Aligning Ball Bearing

Bore d55 mm
Width B43 mm

Product Features

NSK self-aligning ball bearing (2311 series), model 2311K: 55 mm bore, 120 mm OD, 43 mm width, tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr 84 kN, basic static load rating C0r 24 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 4800 min⁻¹ (grease), 6000 min⁻¹ (oil)
Double-row balls on a spherical outer raceway self-align for shaft misalignment; lower friction and higher speed capability than a spherical roller bearing
Nahshon is NSK's distributor in Taiwan — add the part number to your inquiry list

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Product Specifications

Specification	Unit	2311K
Series	-	2311 series
Bore d	mm	55
Outer diameter D	mm	120
Width B	mm	43
Min. chamfer r	mm	2
Bore type	-	tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr	kN	84
Basic static load rating C0r	kN	24
Limiting speed (grease)	min⁻¹	4800
Limiting speed (oil)	min⁻¹	6000

Product Description

The 2311K is an NSK self-aligning ball bearing from the 2311 series: 55 mm bore, 120 mm outer diameter, 43 mm width, tapered bore (K, 1:12 taper). Basic dynamic load rating Cr is 84 kN and basic static load rating C0r is 24 kN (NSK official catalog CAT. No. E1103d). Self-aligning ball bearings use double-row balls on a spherical outer raceway, self-aligning for minor shaft misalignment with lower friction and higher speed capability than a spherical roller bearing, at the cost of lower radial load capacity.

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.