10M+
Registered Capital
USD 10 million registered capital backing our operations and quality commitments.
BKS Oil Seal Technology
Precision Engineered
Oil Seals for Heavy Machinery
Specializing in R&D, production and export of excavator oil seals, hydraulic breaker seal kits, and comprehensive construction machinery spare parts. Adhering to Japanese quality standards with global delivery.
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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.
01
Japanese Quality Standards
Adhering to rigorous Japanese manufacturing protocols, our oil seals deliver exceptional durability and performance in the harshest operating conditions.
02
Global Export Network
Products exported worldwide to Australia, Europe, Brazil, Southeast Asia and beyond. Trusted by maintenance teams across continents.
03
Comprehensive Product Range
From cylinder seals to complete hydraulic breaker kits, we provide one-stop full-category supply for construction machinery spare parts.
04
Compatible With Major Brands
Our seals fit Caterpillar, Komatsu, Volvo, Sany, XCMG and more. Also compatible with Soosan, Furukawa, Decker, Belit and Eddie breakers.
By The Numbers
BKS in Numbers
11,804
Facility Area (m²)
State-of-the-art manufacturing facility with 7,001 m² of production floor space.
20+
Years of Expertise
Decades of specialized experience in oil seal and construction machinery parts manufacturing.
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
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.
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Japanese Quality,<br>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.
Why Choose BKS Precision, Reliability,
Precision, Reliability,
Global Service
With over two decades of specialized expertise, BKS delivers oil seals and construction machinery parts that meet the highest quality standards. Our commitment to Japanese manufacturing protocols, combined with comprehensive inventory and global logistics, ensures that your operations stay running smoothly.
From individual seal kits to bulk supply contracts, we provide flexible solutions tailored to your needs.
Our Journey
2000
Company Founded
BKS Oil Seal Technology established in Tokyo, Japan, with a vision to deliver premium sealing solutions.
2005
China Operations Center
Established Xiamen Bankun Technology Co., Ltd. as the China Operation Center for manufacturing and global export.
2018
Expanded Product Range
Expanded product lines to include comprehensive hydraulic breaker seal kits and undercarriage components.
2020
Global Expansion
Achieved worldwide export network reaching Australia, Europe, Brazil, and Southeast Asian markets.
2024
Quality Certification
Enhanced quality management systems and expanded manufacturing capacity to meet growing global demand.
2026
Continued Innovation
Ongoing R&D investment in new sealing technologies and expansion of compatible equipment coverage.
BKS Advantage
Why Industry Leaders Choose BKS
Quality Standard Japanese Manufacturing to Japanese quality protocols for maximum reliability and performance.
Global Reach 30+ Exporting to more than 30 countries across 6 continents worldwide.
Product Range 5000+ Over 5,000 SKUs covering excavator and hydraulic breaker seal requirements.
Customer Satisfaction 98% Industry-leading customer satisfaction and repeat purchase rate.