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

NSK Bearings Thrust Bearings 51318

Product Overview

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Thrust Bearings/Bearings

51318

Thrust Ball Bearing

Height T50 mm

Product Features

NSK thrust ball bearing, single-direction 51318 series, model 51318: 90 mm shaft-washer bore, 155 mm housing-washer OD, 50 mm height, flat seat
Basic dynamic load rating Ca 214 kN, basic static load rating C0a 525 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 1100 min⁻¹ (grease), 1700 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	51318
Series	-	51318 series (single direction, flat seat)
Shaft washer bore d	mm	90
Housing washer OD D	mm	155
Height T	mm	50
Min. chamfer r	mm	1.5
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	214
Basic static load rating C0a	kN	525
Limiting speed (grease)	min⁻¹	1100
Limiting speed (oil)	min⁻¹	1700

Product Description

The 51318 is an NSK thrust ball bearing from the single-direction 51318 series, standard flat-seat type: 90 mm shaft-washer bore, 155 mm housing-washer outer diameter, 50 mm height. Basic dynamic load rating Ca is 214 kN and basic static load rating C0a is 525 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.