KET 6303 / 6303ZZ Deep Groove Ball Bearing (17x47x14mm) - Maximum Load Heavy-Duty Metric Bearing

Product Description:

Overview The KET 6303 series deep groove ball bearing represents the absolute pinnacle of load-bearing capacity within our 17mm inner diameter metric miniature range. Manufactured by Ningbo Kexiang Bearing Technology Co., Ltd., a specialized and highly trusted bearing manufacturer established in 2008 in Ningbo, Zhejiang Province. Operating under our internationally registered trademark "KET," we supply world-class, ultra-durable metric bearings to global B2B markets. With an impressive annual production volume of 100 million bearing sets, our highly automated manufacturing facilities ensure remarkably stable supply chains and competitive factory-direct wholesale pricing for heavy-industry OEM manufacturers worldwide.

Key Technical Specifications

• Brand: KET

• Model Variants: 6303 (Open Type) / 6303zz (Shielded Type)

• Inner Diameter (d): 17 mm

• Outer Diameter (D): 47 mm

• Width / Thickness (B/B1): 14 mm

• Chamfer (r): 1 mm

• Basic Dynamic Load Rating (Cr): 13600 N

• Basic Static Load Rating (Cor): 6650 N

• Limiting Speed (Grease Lubrication): Up to 18,000 RPM

• Limiting Speed (Oil Lubrication): Up to 15,000 RPM

Primary Industrial Applications The KET 10-20mm inner diameter series is highly versatile and globally trusted by engineers. Featuring an incredibly robust 17x47x14mm profile combined with a massive dynamic load rating of 13600 N, the 6303 bearing is specifically engineered to handle extreme radial stress in applications such as:

• Downstream heavy-duty motor assembly, large-scale commercial/agricultural UAV (Drone) motors, and high-torque industrial brushless motors.

• High-stress medical equipment, robust fitness equipment, and heavy mechanical gear.

• Heavy commercial printers, ATM machines, and heavy-duty automated cash counters.

• Advanced industrial automation systems and precision scientific testing devices.

Why Choose KET Bearings as Your Strategic Manufacturing Partner?

• World-Class Manufacturing Facility: Located at No.555 Fengshou Road, Jiaochuan Street, Zhenhai District, Ningbo, Zhejiang, China, our advanced factory employs state-of-the-art testing equipment—including automatic noise tests and roundness instruments—to guarantee 100% precision and defect-free compliance.

• Internationally Certified Quality Systems: We operate strictly under rigorous global quality management frameworks. We prioritize complete transparency with our B2B enterprise partners and proudly provide our official certifications upon request.

• Recognized Engineering Innovation: Our continuous investment in engineering R&D is validated by our official recognition as a High-Tech Enterprise and a Technology-Based SME in Zhejiang Province.

• Global Material Safety & Environmental Compliance: We exclusively utilize premium raw materials that meet strict international safety directives, fully backed by our comprehensive third-party SGS laboratory testing reports.

• OEM & Customization Capabilities: Beyond our standard metric catalog, our specialized R&D team is fully equipped to design, engineer, and customize non-standard bearings tailored exactly to your unique project and engineering requirements.

Contact Us for Global Wholesale & Bulk Purchasing

Secure your mechanical supply chain with uncompromising engineering quality, reliable delivery schedules, and competitive factory-direct pricing. Contact our international business development department today for B2B quotes, comprehensive technical datasheets, or to request evaluation samples.