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

NSK Bearings Tapered Roller Bearings 30308D

Product Overview

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Tapered Roller Bearings/Bearings

30308D

Tapered Roller Bearing

Bore d40 mm
Width T25.25 mm

Product Features

NSK tapered roller bearing (30308 series), model 30308D: 40 mm bore, 90 mm OD, 25.25 mm width
Basic dynamic load rating Cr 98 kN, basic static load rating C0r 89.5 kN (NSK official catalog; current-generation equivalent HR30308DJ, Cr/C0r figures above are taken from that current design)
Limiting speed approx. 3800 min⁻¹ (grease), 5300 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 Specifications

Specification	Unit	30308D
Series	-	30308 series
Bore d	mm	40
Outer diameter D	mm	90
Width T	mm	25.25
Min. chamfer r	mm	2
Basic dynamic load rating Cr	kN	98
Basic static load rating C0r	kN	89.5
Limiting speed (grease)	min⁻¹	3800
Limiting speed (oil)	min⁻¹	5300

Product Description

The 30308D is an NSK tapered roller bearing from the 30308 series: 40 mm bore, 90 mm outer diameter, 25.25 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 98 kN and basic static load rating C0r is 89.5 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent HR30308DJ, 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.