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

NSK Bearings Angular Contact Ball Bearings 7309BW

Product Overview

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Angular Contact Ball Bearings/Bearings

7309BW

Angular Contact Ball Bearing

NSK Distributor Taiwan

Bore d45 mm
Width B25 mm

Product Features

NSK angular contact ball bearing, single-row 7309 series, model 7309BW: 45 mm bore, 100 mm OD, 25 mm width, 40° contact angle, W pressed-steel cage
Basic dynamic load rating Cr 65.5 kN, basic static load rating C0r 39.5 kN (NSK official catalog; current-generation equivalent 7309BEAW, Cr/C0r figures above are taken from that higher-capacity current design)
Limiting speed approx. 4500 min⁻¹ (grease), 6000 min⁻¹ (oil)
Carries radial load plus axial load in one direction; two or more bearings are matched (DB/DF/DT) for bidirectional loading
Nahshon is NSK's distributor in Taiwan — add the part number to your inquiry list

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Product Description

The 7309BW is an NSK angular contact ball bearing from the single-row 7309 series: 45 mm bore, 100 mm outer diameter, 25 mm width, 40° contact angle, W pressed-steel cage. Basic dynamic load rating Cr is 65.5 kN and basic static load rating C0r is 39.5 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent 7309BEAW, Cr/C0r figures above are taken from that higher-capacity current design). Angular contact ball bearings carry radial load together with axial load in one direction; because a radial load produces an axial reaction, two or more bearings are typically matched (DB, DF or DT) — common in machine-tool spindles, pumps and precision drives.

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	7309BW
Series	-	7309 series (single row)
Bore d	mm	45
Outer diameter D	mm	100
Width B	mm	25
Min. chamfer r	mm	1.5
Contact angle	-	40°
Cage	-	W (pressed steel)
Basic dynamic load rating Cr	kN	65.5
Basic static load rating C0r	kN	39.5
Limiting speed (grease)	min⁻¹	4500
Limiting speed (oil)	min⁻¹	6000

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 7309BW 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 7309BW to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Angular Contact Ball Bearings・7309 series (single row)

7219BW 7220BW 7301BW 7302BW 7303BW 7304BW 7305BW 7306BW 7307BW 7308BW7309BW（This page）7310BW 7311BW 7312BW 7313BW 7314BW 7315BW 7316BW 7317BW 7318BW 7319BW

View All Angular Contact Ball Bearings Models →