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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 1204

Product Overview

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Self-Aligning Ball Bearings/Bearings

1204

Self-Aligning Ball Bearing

NSK Distributor Taiwan

Bore d20 mm
Width B14 mm

Product Features

NSK self-aligning ball bearing (1204 series), model 1204: 20 mm bore, 47 mm OD, 14 mm width, cylindrical bore (no K)
Basic dynamic load rating Cr 11 kN, basic static load rating C0r 2.61 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 14000 min⁻¹ (grease), 17000 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 1204 is an NSK self-aligning ball bearing from the 1204 series: 20 mm bore, 47 mm outer diameter, 14 mm width, cylindrical bore (no K). Basic dynamic load rating Cr is 11 kN and basic static load rating C0r is 2.61 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	1204
Series	-	1204 series
Bore d	mm	20
Outer diameter D	mm	47
Width B	mm	14
Min. chamfer r	mm	1
Bore type	-	cylindrical bore (no K)
Basic dynamic load rating Cr	kN	11
Basic static load rating C0r	kN	2.61
Limiting speed (grease)	min⁻¹	14000
Limiting speed (oil)	min⁻¹	17000

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 1204 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 1204 to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Self-Aligning Ball Bearings・1204 series

1200 1201 1202 12031204（This page）1205 1205K 1206 1206K 1207 1207K 1208 1208K 1209 1209K

View All Self-Aligning Ball Bearings Models →