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

NSK Bearings Tapered Roller Bearings 30307D

Product Overview

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Tapered Roller Bearings/Bearings

30307D

Tapered Roller Bearing

NSK Distributor Taiwan

Bore d35 mm
Width T22.75 mm

Product Features

NSK tapered roller bearing (30307 series), model 30307D: 35 mm bore, 80 mm OD, 22.75 mm width
Basic dynamic load rating Cr 76.5 kN, basic static load rating C0r 68 kN (NSK official catalog; current-generation equivalent HR30307DJ, Cr/C0r figures above are taken from that current design)
Limiting speed approx. 4300 min⁻¹ (grease), 6000 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 30307D is an NSK tapered roller bearing from the 30307 series: 35 mm bore, 80 mm outer diameter, 22.75 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 76.5 kN and basic static load rating C0r is 68 kN (NSK official catalog CAT. No. E1103d; current-generation equivalent HR30307DJ, 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	30307D
Series	-	30307 series
Bore d	mm	35
Outer diameter D	mm	80
Width T	mm	22.75
Min. chamfer r	mm	2
Basic dynamic load rating Cr	kN	76.5
Basic static load rating C0r	kN	68
Limiting speed (grease)	min⁻¹	4300
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 30307D 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 30307D to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Tapered Roller Bearings・30307 series

30302 30303 30303D 30304 30304D 30305 30305D 30306 30306D 3030730307D（This page）30308 30308D 30309 30309D 30310 30310D 30311 30311D 30312 30312D

View All Tapered Roller Bearings Models →