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

NSK Bearings Thrust Bearings 51218

Product Overview

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Thrust Bearings/Bearings

51218

Thrust Ball Bearing

Height T35 mm

Product Features

NSK thrust ball bearing, single-direction 51218 series, model 51218: 90 mm shaft-washer bore, 135 mm housing-washer OD, 35 mm height, flat seat
Basic dynamic load rating Ca 114 kN, basic static load rating C0a 310 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 1400 min⁻¹ (grease), 2200 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	51218
Series	-	51218 series (single direction, flat seat)
Shaft washer bore d	mm	90
Housing washer OD D	mm	135
Height T	mm	35
Min. chamfer r	mm	1.1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	114
Basic static load rating C0a	kN	310
Limiting speed (grease)	min⁻¹	1400
Limiting speed (oil)	min⁻¹	2200

Product Description

The 51218 is an NSK thrust ball bearing from the single-direction 51218 series, standard flat-seat type: 90 mm shaft-washer bore, 135 mm housing-washer outer diameter, 35 mm height. Basic dynamic load rating Ca is 114 kN and basic static load rating C0a is 310 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.