L
o
a
d
i
n
g
.
.
.

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

NSK Bearings Thrust Bearings 51211

Product Overview

L
o
a
d
i
n
g
.
.
.

Thrust Bearings/Bearings

51211

Thrust Ball Bearing

Height T25 mm

Product Features

NSK thrust ball bearing, single-direction 51211 series, model 51211: 55 mm shaft-washer bore, 90 mm housing-washer OD, 25 mm height, flat seat
Basic dynamic load rating Ca 70 kN, basic static load rating C0a 159 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 2200 min⁻¹ (grease), 3200 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

Quantity

Quick Inquiry

Call Us Email Us Contact Us About This Product

Product Specifications

Specification	Unit	51211
Series	-	51211 series (single direction, flat seat)
Shaft washer bore d	mm	55
Housing washer OD D	mm	90
Height T	mm	25
Min. chamfer r	mm	1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	70
Basic static load rating C0a	kN	159
Limiting speed (grease)	min⁻¹	2200
Limiting speed (oil)	min⁻¹	3200

Product Description

The 51211 is an NSK thrust ball bearing from the single-direction 51211 series, standard flat-seat type: 55 mm shaft-washer bore, 90 mm housing-washer outer diameter, 25 mm height. Basic dynamic load rating Ca is 70 kN and basic static load rating C0a is 159 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.