• Miniature brushless DC (BLDC) motors
• High-performance axial cooling fans
• Server rack heat dissipation units
• Stepper motors for 3D printers

• High-speed dental turbine handpieces
• Precision surgical drilling tools
• Laboratory fluid centrifuge systems
• Micro-pump rotational supports

• High-RPM drone propeller motors
• RC car transmission and gear sets
• Gimbal stabilization brushless motors
• High-speed racing model drivetrains

• Laser printer fuser roller supports
• High-resolution scanner drive units
• Automated card sorting mechanisms
• Compact optical disk drive motors

01. Frictionless High-Speed Architecture

The defining advantage of the MR128-ZZ is its non-contact metal shield design. Unlike sealed versions, the ZZ configuration generates zero contact friction, allowing for much higher limiting speeds and lower operating temperatures. This is vital for battery-powered devices where energy efficiency and high RPM stability directly impact the product's performance.

02. Compact Space-Saving Geometry

With an 8mm bore and a thin 3.5mm profile, the MR128-ZZ is specifically built for assemblies with extreme space limitations. It provides the reliability of a deep groove ball bearing in a micro-package, allowing engineers to reduce the overall weight and dimensions of their mechanical housings without sacrificing precision.

03. Low-Noise & Vibration-Damping Design

Manufactured from high-purity GCr15 chrome steel and finished to P5 (ABEC-5) or P6 (ABEC-3) tolerances, these bearings ensure a remarkably quiet operation. The precise finishing of the inner and outer raceways minimizes vibration, which is critical for sensitive applications like high-speed dental tools or precision optical equipment.

Interchange Part Numbers

Directly compatible with industry-standard miniature bearing designations:

• SKF: MR128-Z / MR128-ZZ
• NSK: MR128ZZ
• NTN: MR128ZZ
• KOYO: MR128ZZ
• NMB: L-1280ZZ

Design & Configuration

The MR128-ZZ is supplied pre-lubricated with a high-speed synthetic grease, ensuring maintenance-free performance in clean environments. For applications involving high-frequency vibration or extreme temperatures, we offer customized lubrication and clearance (C3) options. If the application environment involves fine dust or moisture, we recommend choosing the MR128-2RS (contact rubber seals) for maximum protection.

"Delivering industrial-grade precision in a micro-envelope, the MR128-ZZ is the definitive solution for high-speed, low-torque mechanical designs."