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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 1309

Product Overview

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Self-Aligning Ball Bearings/Bearings

1309

Self-Aligning Ball Bearing

NSK Distributor Taiwan

Bore d45 mm
Width B25 mm

Product Features

NSK self-aligning ball bearing (1309 series), model 1309: 45 mm bore, 100 mm OD, 25 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 42 kN, basic static load rating C0r 12.7 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 6000 min⁻¹ (grease), 7500 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 1309 is an NSK self-aligning ball bearing from the 1309 series: 45 mm bore, 100 mm outer diameter, 25 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 42 kN and basic static load rating C0r is 12.7 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	1309
Series	-	1309 series
Bore d	mm	45
Outer diameter D	mm	100
Width B	mm	25
Min. chamfer r	mm	1.5
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	42
Basic static load rating C0r	kN	12.7
Limiting speed (grease)	min⁻¹	6000
Limiting speed (oil)	min⁻¹	7500

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 1309 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 1309 to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Self-Aligning Ball Bearings・1309 series

1303 1304 1305 1305K 1306 1306K 1307 1307K 1308 1308K1309（This page）1309K 1310 1310K 1311 1311K 1312 1312K 1313 1313K 1314

View All Self-Aligning Ball Bearings Models →