604Z Miniature Ball Bearing (4mm x 13mm x 5mm)

Product Overview

High-Precision 604ZZ / 604Z Miniature Deep Groove Ball Bearing

The 604ZZ (604Z) Miniature Ball Bearing is a metric single-row deep groove ball bearing engineered for high-precision, low-vibration, and high-speed rotary applications. Featuring a standard bore size of 4.0mm, an outer diameter of 13.0mm, and a width of 5.0mm, the 604ZZ is one of the most versatile micro bearings used across motion control devices, 3D printers, and RC mechanics.

High-Grade Chrome Steel & Dust Shielded Protection

Manufactured from high-carbon chromium bearing steel (GCr15 / AISI 52100), the inner and outer rings alongside the rolling elements undergo precision heat treatment to achieve superior hardness (HRC 60-65) and structural fatigue strength. Equipped with dual non-contact stamped metal shields (ZZ designation), the bearing retains internal factory lubrication while preventing ambient dust, debris, and particulates from entering the raceway.

Optimized for High RPM & Silent Running

Featuring precision-honed raceway grooves and a balanced steel ribbon cage, the 604ZZ maintains low rotational resistance and quiet running characteristics at speeds up to 40,000 RPM. Its tight dimensional tolerances guarantee smooth radial load support with minimal axial play.

Custom Manufacturing & Material Options

To meet specialized environmental requirements across OEM production lines, custom configurations are available upon request:

• Stainless Steel Options: Stainless steel (SUS440C / SUS304) construction for damp, corrosive, or food-grade applications.
• Flanged Ring Design: Flanged outer ring model (F604ZZ) available for simplified housing mounting and axial location.
• Lubrication Customization: High-temperature grease, low-torque synthetic oil, or dry-film lubricants available upon order specification.
• Precision Grading: Available in ABEC-1, ABEC-3, ABEC-5, and ABEC-7 tolerance classes.

Technical Specifications

Key Features

Applications