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

Product Overview

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Thrust Bearings/Bearings

51215

Thrust Ball Bearing

NSK Distributor Taiwan

Height T27 mm

Product Features

NSK thrust ball bearing, single-direction 51215 series, model 51215: 75 mm shaft-washer bore, 110 mm housing-washer OD, 27 mm height, flat seat
Basic dynamic load rating Ca 78 kN, basic static load rating C0a 209 kN (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 1800 min⁻¹ (grease), 2800 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 Description

The 51215 is an NSK thrust ball bearing from the single-direction 51215 series, standard flat-seat type: 75 mm shaft-washer bore, 110 mm housing-washer outer diameter, 27 mm height. Basic dynamic load rating Ca is 78 kN and basic static load rating C0a is 209 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.

Product Specifications

Specification	Unit	51215
Series	-	51215 series (single direction, flat seat)
Shaft washer bore d	mm	75
Housing washer OD D	mm	110
Height T	mm	27
Min. chamfer r	mm	1
Seat type	-	Flat seat
Basic dynamic load rating Ca	kN	78
Basic static load rating C0a	kN	209
Limiting speed (grease)	min⁻¹	1800
Limiting speed (oil)	min⁻¹	2800

FAQ

What's the difference between the Z, ZZ and DDU suffixes?

Z means a single-side steel shield, ZZ means steel shields on both sides, and DDU means contact rubber seals on both sides. Shields suit general environments and high speeds; rubber seals give better dust and water protection with slightly higher friction torque — choose based on your dust exposure and lubrication method.

When should I choose C3 clearance instead of standard clearance?

For motors or other applications with noticeable temperature rise, or high-speed operation, the inner ring expands from heat and reduces the clearance — choose C3 in that case. Standard clearance is fine for general room-temperature, low-speed use. See Nahshon's technical resources for a clearance selection guide.

Is 51215 in stock in Taiwan? What is the lead time?

Nahshon is the NSK distributor in Taiwan and keeps stock of some commonly used items. Add 51215 to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.

Series Models

Thrust Bearings・51215 series (single direction, flat seat)

51205 51206 51207 51208 51209 51210 51211 51212 51213 5121451215（This page）51216 51217 51218 51220 51305 51306 51307 51308 51309 51310

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