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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 1218K

Product Overview

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Self-Aligning Ball Bearings/Bearings

1218K

Self-Aligning Ball Bearing

NSK Distributor Taiwan

Bore d90 mm
Width B30 mm

Product Features

NSK self-aligning ball bearing (1218 series), model 1218K: 90 mm bore, 160 mm OD, 30 mm width, tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr 63 kN, basic static load rating C0r 23.5 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 3600 min⁻¹ (grease), 4300 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 1218K is an NSK self-aligning ball bearing from the 1218 series: 90 mm bore, 160 mm outer diameter, 30 mm width, tapered bore (K, 1:12 taper). Basic dynamic load rating Cr is 63 kN and basic static load rating C0r is 23.5 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	1218K
Series	-	1218 series
Bore d	mm	90
Outer diameter D	mm	160
Width B	mm	30
Min. chamfer r	mm	2
Bore type	-	tapered bore (K, 1:12 taper)
Basic dynamic load rating Cr	kN	63
Basic static load rating C0r	kN	23.5
Limiting speed (grease)	min⁻¹	3600
Limiting speed (oil)	min⁻¹	4300

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 1218K 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 1218K to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Self-Aligning Ball Bearings・1218 series

1213 1213K 1214 1215 1215K 1216 1216K 1217 1217K 12181218K（This page）1219 1219K 1220 1220K 1222 1222K 1300 1301 1302 1303

View All Self-Aligning Ball Bearings Models →