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

NSK Bearings Thrust Bearings 51120

Product Overview

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Thrust Bearings/Bearings

51120

Thrust Ball Bearing

Height T25 mm

Product Features

NSK thrust ball bearing, single-direction 51120 series, model 51120: 100 mm shaft-washer bore, 135 mm housing-washer OD, 25 mm height, flat seat
Basic dynamic load rating Ca 86 kN, basic static load rating C0a 268 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 1700 min⁻¹ (grease), 2600 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	51120
Series	-	51120 series (single direction, flat seat)
Shaft washer bore d	mm	100
Housing washer OD D	mm	135
Height T	mm	25
Min. chamfer r	mm	1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	86
Basic static load rating C0a	kN	268
Limiting speed (grease)	min⁻¹	1700
Limiting speed (oil)	min⁻¹	2600

Product Description

The 51120 is an NSK thrust ball bearing from the single-direction 51120 series, standard flat-seat type: 100 mm shaft-washer bore, 135 mm housing-washer outer diameter, 25 mm height. Basic dynamic load rating Ca is 86 kN and basic static load rating C0a is 268 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.