• Pumps, Compressors & Blowers
• Conveyor Systems & Rollers
• Agricultural Machinery & Irrigation Equipment
• Electric Motors & Gearboxes

• Cooling Fan Motors
• Power Steering Pumps
• Material Handling Equipment & Caster Wheels
• Alternators & Starter Motors

• Commercial Kitchen Equipment
• Vending Machines & Coin Mechanisms
• Fitness & Exercise Machines
• HVAC Units & Ventilation Fans

• Power Tools & Hand Tools
• Household Appliance Motors
• AC/DC Motors & Fan Motors
• Servo Motors & Encoders

01. Optimized Load Capacity in Compact Dimensions

Manufactured to ISO 03 series dimensions (17×47×14 mm), this bearing delivers a higher load capacity compared to smaller series, while maintaining a compact profile. It is ideal for applications where space is limited but increased radial and axial loads must be supported.

02. High-Precision Manufacturing for Smooth & Quiet Operation

Available in precision classes up to ABEC 5 (P5), the 6303-ZZ features refined internal geometry and superfinished raceways to ensure minimal vibration, low noise, and consistent torque across a wide range of operating speeds and load conditions.

03. Effective Double Metal Shield Design

Two non-contact metal shields (ZZ) provide robust protection against dust, dirt, and fibrous contaminants while preserving lubrication and reducing frictional drag. This design is particularly suitable for applications operating in moderately dirty environments and where high rotational speeds are required.

Interchange Part Numbers

Common manufacturer equivalents include:

• SKF: 6303-Z
• NSK: 6303ZZ
• FAG: 6303-ZZ
• NTN: 6303ZZ
• KOYO: 6303ZZ

Design & Configuration

The 6303-ZZ is supplied as standard with double metal shields, offering an excellent balance between protection and speed capability. For applications requiring enhanced sealing against moisture and fine particles, the double rubber-sealed version (6303-2RS) is also available.

"Select the 6303-ZZ for electric motors, pumps, and industrial machinery where reliable dust protection and high-speed operation are critical for long-term performance."