20 Years of Bearing Manufacturing Excellence

Since 2004, SINO BEARINGS (KMK brand) has been manufacturing precision bearings in Chengdu, China, serving customers worldwide across more than 40 countries. As we enter 2026, we celebrate two decades of continuous improvement, technical innovation, and customer-focused service.

Our Journey: From Workshop to Global Supplier

What began as a small workshop producing standard ball bearings has grown into a comprehensive manufacturing facility capable of producing:

• Ball bearings: Deep groove, angular contact, thrust, and miniature
• Roller bearings: Cylindrical, tapered, spherical, and needle
• Specialty bearings: Stainless steel (630, 17-4PH), full ceramic (ZrO2, Si3N4)
• Custom solutions: Bespoke designs for unique applications
• Related components: Chains, oil seals, bearing housings

New Capabilities for 2026

Advanced Material Processing

We've expanded our heat treatment capabilities to include full in-house precipitation hardening for 17-4PH stainless steel, ensuring consistent quality and faster turnaround for corrosion-resistant bearing orders.

Precision Enhancement

Our quality control laboratory now features advanced metrology equipment capable of measuring to P4/P2 precision classes, supporting aerospace and medical industry requirements.

Custom Engineering Services

Our expanded engineering team offers comprehensive custom bearing design services, from initial concept through prototyping and production, with typical prototype turnaround of just 2-3 weeks.

Product Highlights for 2026

17-4PH Stainless Steel Bearing Line

Our premium 17-4PH bearing line has been expanded with additional sizes and configurations. These bearings deliver HRC 42-48 hardness with excellent corrosion resistance - ideal for food processing, marine, and pharmaceutical applications.

Full Ceramic Bearing Range

We now offer an expanded range of full ceramic bearings in both ZrO2 (zirconia) and Si3N4 (silicon nitride) materials. These bearings provide ultimate corrosion resistance, electrical insulation, and high-temperature capability for the most demanding applications.

Hybrid Ceramic Bearings

Our hybrid ceramic bearings (Si3N4 balls with stainless steel rings) offer the best balance of performance and value for electric vehicle motors, high-speed spindles, and precision machinery.

Special 2026 Programs

• Sample program: Free evaluation samples for qualified industrial buyers (contact us for details)
• Low MOQ custom orders: Minimum orders starting from 50 pieces for prototyping
• Fast-track production: Expedited manufacturing for urgent requirements
• Technical partnership: Joint development for OEM customers with annual volume

Why Customers Choose SINO BEARINGS

• 20+ years of manufacturing experience
• KMK brand quality trusted in 40+ countries
• Full material range from standard steel to premium ceramic
• Custom capability for unique requirements
• Competitive pricing with factory-direct terms
• Worldwide shipping with complete documentation

Whether you need standard catalog bearings or custom-engineered solutions, SINO BEARINGS has the experience, capability, and commitment to deliver. Contact us today to discuss your requirements.

SINO BEARINGS (KMK) - 20 years of precision bearing manufacturing. Perfect Quality -- Great Service -- Customized.

Source: SINO BEARINGS