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

NSK Bearings Thrust Bearings 51309

Product Overview

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Thrust Bearings/Bearings

51309

Thrust Ball Bearing

Height T28 mm

Product Features

NSK thrust ball bearing, single-direction 51309 series, model 51309: 45 mm shaft-washer bore, 85 mm housing-washer OD, 28 mm height, flat seat
Basic dynamic load rating Ca 80.5 kN, basic static load rating C0a 163 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 2000 min⁻¹ (grease), 3000 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	51309
Series	-	51309 series (single direction, flat seat)
Shaft washer bore d	mm	45
Housing washer OD D	mm	85
Height T	mm	28
Min. chamfer r	mm	1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	80.5
Basic static load rating C0a	kN	163
Limiting speed (grease)	min⁻¹	2000
Limiting speed (oil)	min⁻¹	3000

Product Description

The 51309 is an NSK thrust ball bearing from the single-direction 51309 series, standard flat-seat type: 45 mm shaft-washer bore, 85 mm housing-washer outer diameter, 28 mm height. Basic dynamic load rating Ca is 80.5 kN and basic static load rating C0a is 163 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.