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

Product Overview

NSK Bearings Deep Groove Ball Bearings 6904

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Deep Groove Ball Bearings/Bearings

6904

Deep Groove Ball Bearing (NSK Authorized Distributor, Taiwan)

Bore d20 mm
Width B9 mm

Product Features

NSK deep groove ball bearing (6904 series), model 6904: 20 mm bore, 37 mm outer diameter, 9 mm width, open type (no shield, no seal)
Basic dynamic load rating Cr 7 kN, basic static load rating C0r 3.7 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 19000 min⁻¹ (grease), 22000 min⁻¹ (oil)
Simple, low-friction, high-speed design carrying radial load plus moderate bidirectional axial load — the most widely used bearing type
Nahshon is NSK's authorized distributor in Taiwan — add the part number to your inquiry list for a direct quote

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Product Specifications

Specification	Unit	6904
Series	-	6904 series
Bore d	mm	20
Outer diameter D	mm	37
Width B	mm	9
Min. chamfer r	mm	0.3
Seal / shield	-	open type (no shield, no seal)
Basic dynamic load rating Cr	kN	7
Basic static load rating C0r	kN	3.7
Limiting speed (grease)	min⁻¹	19000
Limiting speed (oil)	min⁻¹	22000

Product Description

The 6904 is an NSK deep groove ball bearing from the 6904 series: 20 mm bore, 37 mm outer diameter, 9 mm width, open type (no shield, no seal). Basic dynamic load rating Cr is 7 kN and basic static load rating C0r is 3.7 kN (NSK official catalog CAT. No. E1103d). Deep groove ball bearings are simple, low-friction and capable of high speeds while carrying both radial and moderate bidirectional axial loads — the most widely used bearing type, common in motors, gear reducers, pumps, fans and general machinery.

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.