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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 1311

Product Overview

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Self-Aligning Ball Bearings/Bearings

1311

Self-Aligning Ball Bearing

NSK Distributor Taiwan

Bore d55 mm
Width B29 mm

Product Features

NSK self-aligning ball bearing (1311 series), model 1311: 55 mm bore, 120 mm OD, 29 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 57 kN, basic static load rating C0r 17.9 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 5000 min⁻¹ (grease), 6300 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 Description

The 1311 is an NSK self-aligning ball bearing from the 1311 series: 55 mm bore, 120 mm outer diameter, 29 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 57 kN and basic static load rating C0r is 17.9 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.

Product Specifications

Specification	Unit	1311
Series	-	1311 series
Bore d	mm	55
Outer diameter D	mm	120
Width B	mm	29
Min. chamfer r	mm	2
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	57
Basic static load rating C0r	kN	17.9
Limiting speed (grease)	min⁻¹	5000
Limiting speed (oil)	min⁻¹	6300

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 1311 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 1311 to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Self-Aligning Ball Bearings・1311 series

1306 1306K 1307 1307K 1308 1308K 1309 1309K 1310 1310K1311（This page）1311K 1312 1312K 1313 1313K 1314 1315 1315K 1316 1316K

View All Self-Aligning Ball Bearings Models →