Japanese Quality Standards
Adhering to rigorous Japanese manufacturing protocols, our oil seals deliver exceptional durability and performance in the harshest operating conditions.
BKS Oil Seal Technology
Superior Japanese
Technology
Providing high-quality oil seals for the industry, with dedicated research, development and production for excavators and hydraulic breakers.
Why BKS
Engineering Excellence in Every Seal
BKS Oil Seal Technology Co., Ltd. is a leading manufacturer specializing in high-performance oil seals for excavators and hydraulic breakers. Our China Operation Center, Xiamen Bankun Technology Co., Ltd., serves as the global hub for R&D, production, and export. Our core product range includes cylinder oil seals, hydraulic breaker seal kits, undercarriage parts, hydraulic pumps & valves, travel and swing assemblies, and full-machine maintenance parts. Every product is manufactured to Japanese quality standards, ensuring reliability in the most demanding environments.
Global Export Network
Products exported worldwide to Australia, Europe, Brazil, Southeast Asia and beyond. Trusted by maintenance teams across continents.
Comprehensive Product Range
From cylinder seals to complete hydraulic breaker kits, we provide one-stop full-category supply for construction machinery spare parts.
Compatible With Major Brands
Our seals fit Caterpillar, Komatsu, Volvo, Sany, XCMG and more. Also compatible with Soosan, Furukawa, Decker, Belit and Eddie breakers.
Product Lines
Our Core Products
Comprehensive range of high-performance oil seals and hydraulic components for excavators and hydraulic breakers.
Excavator Parts
Cylinder Oil Seals
High-durability cylinder oil seals designed for excavator hydraulic cylinders, ensuring leak-free operation and extended service life.
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Breaker Parts
Hydraulic Breaker Seal Kits
Complete seal kits for hydraulic breakers, compatible with Soosan, Furukawa, Decker, Belit, Eddie and other leading brands.
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Undercarriage Parts
Robust undercarriage components including travel motors, swing assemblies, and tension cylinders for excavators.
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Hydraulic Systems
Hydraulic Pumps & Valves
Precision-engineered hydraulic pumps and control valves, manufactured to OEM specifications for reliable performance.
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Seal Kits
Piston & Rod Seals
Comprehensive range of piston seals (BPGO, BPGW, BKZT) and rod seals (BDI, BHY, BUH) for various excavator models.
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Maintenance
Repair Kits & Components
Full-machine maintenance parts and hydraulic cylinder repair kits for excavator and breaker servicing needs.
Learn More →About BKSJapanese Quality,
Japanese Quality,
Global Reach
BKS Oil Seal Co., Ltd. operates through its China Operation Center, Xiamen Bankun Technology Co., Ltd. We specialize in the research, development, production, and export of oil seals for excavators and hydraulic breakers, along with a comprehensive range of construction machinery spare parts. Our products are designed to fit mainstream excavator models from Caterpillar, Komatsu, Volvo, Sany, XCMG and more, as well as hydraulic breakers from Soosan, Furukawa, Decker, Belit, Eddie and other leading brands. With Japanese quality standards, high-end product positioning, and one-stop full-category supply, we serve customers in Australia, Europe, Brazil, and regions worldwide. We are committed to providing integrated supporting services for construction machinery spare parts with stable quality and exceptional cost performance.
Latest news · March 2025
BKS Oil Seal Shines at bauma CHINA 2024 in Shanghai
From November 26th to 29th, 2024, BKS Oil Seal actively participated in bauma CHINA 2024 held at the Shanghai New International Expo Center. This exhibition, with the theme of Meeting in the Light, S
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