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

NSK Bearings Tapered Roller Bearings 30203

Product Overview

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Tapered Roller Bearings/Bearings

30203

Tapered Roller Bearing

NSK Distributor Taiwan

Bore d17 mm
Width T13.25 mm

Product Features

NSK tapered roller bearing (30203 series), model 30203: 17 mm bore, 40 mm OD, 13.25 mm width
Basic dynamic load rating Cr 24.8 kN, basic static load rating C0r 19.9 kN (NSK official catalog; current-generation equivalent HR30203J, Cr/C0r figures above are taken from that current design)
Limiting speed approx. 9500 min⁻¹ (grease), 13000 min⁻¹ (oil)
Carries combined radial load and axial load in one direction; inner and outer rings are separable for easy mounting and service
Nahshon is NSK's distributor in Taiwan — add the part number to your inquiry list

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Product Description

The 30203 is an NSK tapered roller bearing from the 30203 series: 17 mm bore, 40 mm outer diameter, 13.25 mm width. Tapered roller bearings use a tapered inner ring, rollers and outer raceway so a single bearing carries combined radial load and axial load in one direction; inner and outer rings are separable, giving flexible mounting and clearance adjustment. Basic dynamic load rating Cr is 24.8 kN and basic static load rating C0r is 19.9 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent HR30203J, Cr/C0r figures above are taken from that current design).

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	30203
Series	-	30203 series
Bore d	mm	17
Outer diameter D	mm	40
Width T	mm	13.25
Min. chamfer r	mm	1
Basic dynamic load rating Cr	kN	24.8
Basic static load rating C0r	kN	19.9
Limiting speed (grease)	min⁻¹	9500
Limiting speed (oil)	min⁻¹	13000

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 30203 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 30203 to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Tapered Roller Bearings・30203 series

3020230203（This page）30204 30205 30206 30207 30208 30209 30210 30211 30212 30213

View All Tapered Roller Bearings Models →