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

NSK Bearings Thrust Bearings 51308

Product Overview

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Thrust Bearings/Bearings

51308

Thrust Ball Bearing

Height T26 mm

Product Features

NSK thrust ball bearing, single-direction 51308 series, model 51308: 40 mm shaft-washer bore, 78 mm housing-washer OD, 26 mm height, flat seat
Basic dynamic load rating Ca 70 kN, basic static load rating C0a 135 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 2200 min⁻¹ (grease), 3400 min⁻¹ (oil)
Carries pure axial load in one direction only — no radial capacity; shaft washer and housing washer must not be reversed
Nahshon is NSK's distributor in Taiwan — add the part number to your inquiry list

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Product Specifications

Specification	Unit	51308
Series	-	51308 series (single direction, flat seat)
Shaft washer bore d	mm	40
Housing washer OD D	mm	78
Height T	mm	26
Min. chamfer r	mm	1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	70
Basic static load rating C0a	kN	135
Limiting speed (grease)	min⁻¹	2200
Limiting speed (oil)	min⁻¹	3400

Product Description

The 51308 is an NSK thrust ball bearing from the single-direction 51308 series, standard flat-seat type: 40 mm shaft-washer bore, 78 mm housing-washer outer diameter, 26 mm height. Basic dynamic load rating Ca is 70 kN and basic static load rating C0a is 135 kN (NSK official catalog CAT. No. E1103d). Thrust ball bearings carry pure axial load in one direction only — no radial capacity — and are common in worm-gear reducers, screw jacks and valve actuator shafts where low-speed axial thrust must be supported.

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.