• Micro DC Motors
• Stepper Motors
• Cooling Fans
• Small Gearboxes

• Encoders & Sensors
• Laboratory Equipment
• Gauges & Meters
• Medical Hand Tools

• Robotic Arm Joints
• CNC Tool Changers
• Optical Scanners
• Measuring Instruments

• Optical Drives (CD/DVD)
• Printers & Scanners
• Small Household Appliances
• RC Models & Drones

01. Effective Dual-Shield Protection

The double non-contact steel shields guard both sides against dust and larger particles while retaining lubrication and maintaining minimal friction. This design is ideal where contamination resistance is needed without compromising low rotational torque.

02. Space-Saving Extra-Light Design

With its extra-light series construction, the bearing offers a compact cross-section and a reduced footprint, delivering reliable load capacity in tight spaces commonly found in miniature mechanisms and small electronic assemblies.

03. Smooth, Quiet Running Performance

Manufactured to standard industrial tolerances and available in optional precision grades, its optimized internal geometry ensures smooth rotation, low noise, and reduced heat buildup—supporting consistent operation in noise-sensitive and precision devices.

Interchange Part Numbers

Direct replacement for:

• SKF: 604-2Z
• NSK: 604 ZZ
• FAG: 604-ZZ
• NMB: MR104ZZ
• NTN: 604ZZ

Design & Configuration

The 604-ZZ is equipped with double pressed steel shields on both sides. For applications that demand higher sealing against moisture or fine contaminants—with acceptable trade-off in friction—the rubber-sealed version (604-2RS) is also available.

"In environments with elevated dust or moisture, the 604-2RS with double rubber seals provides enhanced protection for extended bearing life."