608ZZ / 608 Miniature Ball Bearing (8mm x 22mm x 7mm)

Product Overview

High-Precision 608ZZ / 608 Miniature Deep Groove Ball Bearing

The 608ZZ (608) Miniature Ball Bearing is the most widely produced metric single-row deep groove ball bearing in the world. Featuring a standard bore size of 8.0mm, an outer diameter of 22.0mm, and a width of 7.0mm, the 608ZZ serves as the universal choice for skateboards, 3D printing equipment, electric motors, and power tools.

High-Grade Chrome Steel & Contamination Shielding

Manufactured from high-carbon chromium bearing steel (GCr15 / AISI 52100), the inner ring, outer ring, and precision balls undergo heat treatment to reach high hardness (HRC 60-65) and structural fatigue endurance. Fitted with dual non-contact stamped metal shields (ZZ designation), the bearing retains factory grease while repelling ambient dust, debris, and abrasive particles.

Low Friction & Smooth High-Speed Performance

Equipped with precision-honed raceway grooves and a balanced steel ribbon cage, the 608ZZ delivers low rotational resistance, low acoustic noise, and smooth running characteristics at speeds up to 34,000 RPM. Its tight dimensional tolerances ensure reliable radial support and long service life under high-impact conditions.

Custom Manufacturing & Material Options

To support various 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.
• Rubber Sealed Variant: Rubber contact sealed model (608-2RS) available for enhanced water and dust protection.
• 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