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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

52338X

Double-Direction Thrust Ball Bearing

NSK Distributor Taiwan

Product Features

NSK double-direction thrust ball bearing 52338X (flat seat type): 190 mm bore, 320 mm outer diameter, 183 mm overall height
Basic dynamic load rating Ca 550000 N, basic static load rating C0a 1960000 N (NSK official catalog CAT. No. E1103d)
Limiting speed approx. 480 min⁻¹ (grease), 710 min⁻¹ (oil)
Carries pure axial load in both directions with no radial load capacity, from the same NSK thrust ball bearing table as Nahshon's existing 51xxx single-direction series; Only the flat-seat type is available for this size; no aligning-seat variant

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Product Description

The 52338X is an NSK double-direction thrust ball bearing (flat seat type): 190 mm bore, 320 mm outer diameter, 183 mm overall height. Basic dynamic load rating Ca is 550000 N and basic static load rating C0a is 1960000 N (NSK official catalog CAT. No. E1103d). Double-direction thrust ball bearings carry pure axial load in both directions with no radial load capacity; shaft/housing washer orientation must not be reversed during installation. From the same NSK thrust ball bearing table as Nahshon's existing 51xxx single-direction series, commonly used in screw drives, valves and precision positioning mechanisms requiring bidirectional axial location. Only the flat-seat type is available for this size; no aligning-seat variant.

For current spec and catalog cross-reference, please inquire: Nahshon is NSK's distributor in Taiwan with full part-number lookup and sourcing support — add the part number to your inquiry list and we will confirm the current code, spec and quote with the factory; sourcing support is also available for discontinued models.

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 52338X 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 52338X to your inquiry list or give us a call, and we'll confirm stock, lead time and quote.