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

Product Overview

NSK Bearings Angular Contact Ball Bearings 5311

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Angular Contact Ball Bearings/Bearings

5311

Angular Contact Ball Bearing (NSK Authorized Distributor, Taiwan)

Bore d55 mm
Width B49.2 mm

Product Features

NSK double-row angular contact ball bearing (5311 series), model 5311: 55 mm bore, 120 mm OD, 49.2 mm width, open type
Basic dynamic load rating Cr 105 kN, basic static load rating C0r 73 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 3800 min⁻¹ (grease), 5000 min⁻¹ (oil)
Inner and outer rings are each integrated into one piece, equivalent to two back-to-back single-row bearings — carries bidirectional axial load and moment loads as a single unit
Nahshon is NSK's authorized distributor in Taiwan — add the part number to your inquiry list

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Product Specifications

Specification	Unit	5311
Series	-	5311 series (double row)
Bore d	mm	55
Outer diameter D	mm	120
Width B	mm	49.2
Min. chamfer r	mm	2
Type	-	Open
Basic dynamic load rating Cr	kN	105
Basic static load rating C0r	kN	73
Limiting speed (grease)	min⁻¹	3800
Limiting speed (oil)	min⁻¹	5000

Product Description

The 5311 is an NSK double-row angular contact ball bearing from the 5311 series: 55 mm bore, 120 mm outer diameter, 49.2 mm width, open type. Basic dynamic load rating Cr is 105 kN and basic static load rating C0r is 73 kN (NSK official catalog CAT. No. E1103d). Inner and outer rings are each integrated into one piece, equivalent to a back-to-back pair of single-row angular contact bearings — a single unit carries bidirectional axial load, radial load and moment loading, common in machine-tool spindles, printing machinery and pumps as a fixed-end bearing.

Inquiries & customization

Add this part number to your inquiry list — Nahshon is NSK's authorized distributor in Taiwan and works directly with the factory to confirm specifications, stock and pricing.