609ZZ / 609-2RS Miniature Ball Bearing (9mm x 24mm x 7mm)

Product Overview

High-Precision 609 Series (609ZZ / 609-2RS) Miniature Deep Groove Ball Bearing

The 609 Series Miniature Ball Bearing is a standard metric single-row deep groove ball bearing engineered for high-precision, low-vibration, and high-speed rotary applications. Featuring a standard bore size of 9.0mm (0.354″), an outer diameter of 24.0mm (0.945″), and a width of 7.0mm (0.276″), the 609 series serves as a reliable rotational component across electric motors, power tools, 3D printing equipment, and recreational transportation wheels.

High-Grade Chrome Steel & Flexible Shielding Options

Manufactured from high-carbon chromium bearing steel (GCr15 / AISI 52100), the inner ring, outer ring, and precision steel balls undergo specialized thermal heat treatment to reach high hardness (HRC 60-65) and structural fatigue endurance. Depending on environmental demands, customers can choose between non-contact metal shields (ZZ designation) for high-speed low-friction running, or rubber contact seals (2RS designation) for maximum defense against ambient dust, water, and debris.

Low Friction & Smooth High-Speed Performance

Equipped with precision-honed raceway grooves and a balanced steel ribbon cage, the 609 bearing delivers low rotational resistance, low acoustic noise, and smooth running characteristics at speeds up to 38,000 RPM. Its tight dimensional tolerances ensure reliable radial support and moderate axial capacity under continuous operating conditions.

Custom Manufacturing & Material Options

To support specialized industrial and recreational application environments, custom configurations are available upon request:

• Stainless Steel Options: Stainless steel (SUS440C / SUS304) construction for damp, corrosive, or marine environments.
• Flanged Ring Design: Flanged outer ring model (F609) available for simplified housing mounting and axial location.
• Ceramic Hybrid Options: Silicon nitride (Si3N4) or zirconia (ZrO2) ceramic ball options for low-friction, high-speed skating or racing applications.
• Precision Grading: Available in ABEC-1, ABEC-3, ABEC-5, and ABEC-7 tolerance classes.

Technical Specifications

Key Features

Applications