• Industrial Gearbox Input/Output Shafts
• Transmission Housings
• Differential Mechanisms (light‑duty)
• Speed Reducer Bearings

• Light‑Duty Spindle Supports
• Printing Press Rollers
• Packaging Machine Feed Mechanisms
• Textile Machinery Spindles

• AC and DC Electric Motor Shafts
• Servo and Stepper Motor Supports
• Pump Motor Bearings
• Cooling Fan Motors

• Centrifugal Pump Impeller Supports
• Hydraulic Pump Rotors
• Vacuum Pump Bearings
• Air Compressor Crankshafts

01. High Load Capacity

The 6404 features a deep groove raceway and a robust internal geometry, enabling it to handle substantial radial loads and moderate axial loads in both directions. With dynamic and static load ratings of 30.7 kN and 15 kN respectively, it is well‑suited for demanding industrial applications.

02. Versatile Configuration

Available in open, shielded (ZZ), or sealed (2RS) versions, the 6404 can be tailored to specific application requirements. The open design allows for high‑speed operation and re‑lubrication, while shielded or sealed variants provide protection against contamination and lubricant retention.

03. Durable Construction

Manufactured from high‑quality chrome steel (GCR15 / SAE 52100) and precision ground, the 6404 ensures long‑lasting performance under continuous operation. Its sturdy design resists wear and fatigue, contributing to extended service life in harsh environments.

Interchange Part Numbers

Common manufacturer equivalents include:

• SKF: 6404, 6404-2Z, 6404-2RS1
• NSK: 6404, 6404ZZ, 6404DDU
• FAG: 6404, 6404.2ZR, 6404.2RSR
• NTN: 6404, 6404LLB, 6404LLU
• Generic: 6404, 6404ZZ, 6404-2RS

Design & Configuration

The 6404 is typically supplied as an open bearing (without seals or shields), allowing maximum speed and flexibility for re‑lubrication. For applications requiring protection against dust or moisture, shielded (ZZ) or sealed (2RS) versions are available upon request. The bearing is pre‑lubricated with high‑quality grease in its sealed variants, while open bearings require initial lubrication during installation. Its standard dimensions conform to ISO series 64, ensuring interchangeability with major bearing brands worldwide.

"For electric motors, pumps, gearboxes, and a wide range of industrial machinery, the 6404 deep groove ball bearing offers a perfect balance of load capacity, speed capability, and durability. Its versatile design and availability with different sealing options make it a go‑to choice for maintenance and OEM applications."