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

NSK Bearings Thrust Bearings 51205

Product Overview

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Thrust Bearings/Bearings

51205

Thrust Ball Bearing

Height T15 mm

Product Features

NSK thrust ball bearing, single-direction 51205 series, model 51205: 25 mm shaft-washer bore, 47 mm housing-washer OD, 15 mm height, flat seat
Basic dynamic load rating Ca 28 kN, basic static load rating C0a 50.5 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 3800 min⁻¹ (grease), 5600 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	51205
Series	-	51205 series (single direction, flat seat)
Shaft washer bore d	mm	25
Housing washer OD D	mm	47
Height T	mm	15
Min. chamfer r	mm	0.6
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	28
Basic static load rating C0a	kN	50.5
Limiting speed (grease)	min⁻¹	3800
Limiting speed (oil)	min⁻¹	5600

Product Description

The 51205 is an NSK thrust ball bearing from the single-direction 51205 series, standard flat-seat type: 25 mm shaft-washer bore, 47 mm housing-washer outer diameter, 15 mm height. Basic dynamic load rating Ca is 28 kN and basic static load rating C0a is 50.5 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.