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

NSK Bearings Thrust Bearings 51203

Product Overview

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Thrust Bearings/Bearings

51203

Thrust Ball Bearing

Height T12 mm

Product Features

NSK thrust ball bearing, single-direction 51203 series, model 51203: 17 mm shaft-washer bore, 35 mm housing-washer OD, 12 mm height, flat seat
Basic dynamic load rating Ca 17.3 kN, basic static load rating C0a 27.3 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 4800 min⁻¹ (grease), 7500 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	51203
Series	-	51203 series (single direction, flat seat)
Shaft washer bore d	mm	17
Housing washer OD D	mm	35
Height T	mm	12
Min. chamfer r	mm	0.6
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	17.3
Basic static load rating C0a	kN	27.3
Limiting speed (grease)	min⁻¹	4800
Limiting speed (oil)	min⁻¹	7500

Product Description

The 51203 is an NSK thrust ball bearing from the single-direction 51203 series, standard flat-seat type: 17 mm shaft-washer bore, 35 mm housing-washer outer diameter, 12 mm height. Basic dynamic load rating Ca is 17.3 kN and basic static load rating C0a is 27.3 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.