LEEWON PRECISION, The Republic of Korea - Komachine Supplier Profile and Product List

- Leewon Precision is a company specializing in the production of automotive components requiring high-precision machining technology. It primarily supplies core engine and transmission parts such as camshafts, PCV valves, and turbochargers. The company aims to contribute to a safe and comfortable transportation culture for humanity through its world-class precision machining capabilities. Established in 1982, it has accumulated over 40 years of technology to stably supply high-quality parts to leading domestic and international automakers.Leewon Precision is a company specializing in the production of automotive components requiring high-precision machining technology. It primarily supplies core engine and transmission parts such as camshafts, PCV valves, and turbochargers. The company aims to contribute to a safe and comfortable transportation culture for humanity through its world-class precision machining capabilities. Established in 1982, it has accumulated over 40 years of technology to stably supply high-quality parts to leading domestic and international automakers.
- ENG PART (Engine Parts): Camshafts are critical components for operating valves in internal combustion engines, with capabilities in developing camshafts for 4-wheel vehicles, as well as assembly-type camshaft design technology and assembly methods. These products feature higher allowable surface pressure, wider material selection, and flexible cam profile changes compared to cast or sintered cams. PCV (Positive Crankcase Ventilation) valves are flow control valves that recirculate blow-by gases for re-combustion, with secured localization design and testing evaluation technologies. Turbochargers (Turbine Housing) are components that use engine exhaust gas pressure to force high-pressure intake air into the engine, thereby increasing power output. Oil Jet Ass'y lubricates and cools pistons by injecting engine oil, featuring oil injection above a certain pressure, backflow prevention, and flow control functions. Auto Tensioners and Arm Tensioners are crucial for controlling the timing of engine ignition, intake/exhaust valve opening/closing, and fuel injection, improving belt noise, vibration, and durability.ENG PART (Engine Parts): Camshafts are critical components for operating valves in internal combustion engines, with capabilities in developing camshafts for 4-wheel vehicles, as well as assembly-type camshaft design technology and assembly methods. These products feature higher allowable surface pressure, wider material selection, and flexible cam profile changes compared to cast or sintered cams. PCV (Positive Crankcase Ventilation) valves are flow control valves that recirculate blow-by gases for re-combustion, with secured localization design and testing evaluation technologies. Turbochargers (Turbine Housing) are components that use engine exhaust gas pressure to force high-pressure intake air into the engine, thereby increasing power output. Oil Jet Ass'y lubricates and cools pistons by injecting engine oil, featuring oil injection above a certain pressure, backflow prevention, and flow control functions. Auto Tensioners and Arm Tensioners are crucial for controlling the timing of engine ignition, intake/exhaust valve opening/closing, and fuel injection, improving belt noise, vibration, and durability.
- T/M PART (Transmission Parts): Inner Race components are assembled into the double tapered roller bearings of automatic transmissions, transmitting torque in only one direction and amplifying power at low speeds. Hybrid Check Valves are installed in automatic transmission cases, allowing oil flow during mechanical oil pump discharge and blocking leakage towards the mechanical oil pump during electric oil pump operation, improving shift feel. Adjust Screws are mounted in the automatic transmission valve body, moving the spool that regulates the final line pressure. Relief Valves prevent hydraulic pressure from exceeding a certain level and improve air discharge from the piston flow path.T/M PART (Transmission Parts): Inner Race components are assembled into the double tapered roller bearings of automatic transmissions, transmitting torque in only one direction and amplifying power at low speeds. Hybrid Check Valves are installed in automatic transmission cases, allowing oil flow during mechanical oil pump discharge and blocking leakage towards the mechanical oil pump during electric oil pump operation, improving shift feel. Adjust Screws are mounted in the automatic transmission valve body, moving the spool that regulates the final line pressure. Relief Valves prevent hydraulic pressure from exceeding a certain level and improve air discharge from the piston flow path.
- CHASSIS PART (Chassis Parts): Production of various chassis components including oil chambers, connector assemblies, ball and union joints, hose bolts, and holder driers.CHASSIS PART (Chassis Parts): Production of various chassis components including oil chambers, connector assemblies, ball and union joints, hose bolts, and holder driers.
- Core Technologies: Precision machining technology, independent design, manufacturing, and testing capabilities through CAD system LAN environment establishment. Expertise in developing automotive component testing technologies for valve flow rate, pressure, and temperature changes. Implementation of fluid/structure analysis (ANSYS) and development of PCV valve computational design programs and flow verification feedback programs through industry-academia collaboration.Core Technologies: Precision machining technology, independent design, manufacturing, and testing capabilities through CAD system LAN environment establishment. Expertise in developing automotive component testing technologies for valve flow rate, pressure, and temperature changes. Implementation of fluid/structure analysis (ANSYS) and development of PCV valve computational design programs and flow verification feedback programs through industry-academia collaboration.
- World-class precision machining technology is a core competitive advantage for Leewon Precision. The company leverages over 40 years of accumulated precision machining know-how and proprietary technologies to produce high-quality automotive components. This capability forms the foundation for meeting the high precision and reliability demands of the automotive industry.World-class precision machining technology is a core competitive advantage for Leewon Precision. The company leverages over 40 years of accumulated precision machining know-how and proprietary technologies to produce high-quality automotive components. This capability forms the foundation for meeting the high precision and reliability demands of the automotive industry.
- Continuous R&D and technological innovation efforts ensure the acquisition of advanced technologies. Since establishing its R&D center in 1996, the company has consistently invested heavily in design, production, and testing technologies. Strategic technical alliances with leading foreign companies like TSUBAKIMOTO CHAIN CO. and MUSASHI SEIMITSU INDUSTRY CO. have enabled the adoption of advanced technologies for hydraulic auto tensioners, chain tensioners, and assembly-type camshafts.Continuous R&D and technological innovation efforts ensure the acquisition of advanced technologies. Since establishing its R&D center in 1996, the company has consistently invested heavily in design, production, and testing technologies. Strategic technical alliances with leading foreign companies like TSUBAKIMOTO CHAIN CO. and MUSASHI SEIMITSU INDUSTRY CO. have enabled the adoption of advanced technologies for hydraulic auto tensioners, chain tensioners, and assembly-type camshafts.
- Possession of a diverse product portfolio and specialized expertise in critical automotive components. The company's business model focuses on the professional development and manufacturing of core functional components for engines, transmissions, and chassis, supplied on a B2B basis. Products such as camshafts, PCV valves, and oil jets are high-value-added components directly influencing engine output, fuel efficiency, durability, and compliance with eco-friendly regulations.Possession of a diverse product portfolio and specialized expertise in critical automotive components. The company's business model focuses on the professional development and manufacturing of core functional components for engines, transmissions, and chassis, supplied on a B2B basis. Products such as camshafts, PCV valves, and oil jets are high-value-added components directly influencing engine output, fuel efficiency, durability, and compliance with eco-friendly regulations.
- Establishment of a global production and supply chain for market expansion. The company supplies parts not only to leading domestic automakers but also to international markets, earning recognition for its technology and quality. The operation of a local subsidiary, LEEWON PRECISION PVT. LTD., in Chennai, India, since 2008, strengthens its global market responsiveness.Establishment of a global production and supply chain for market expansion. The company supplies parts not only to leading domestic automakers but also to international markets, earning recognition for its technology and quality. The operation of a local subsidiary, LEEWON PRECISION PVT. LTD., in Chennai, India, since 2008, strengthens its global market responsiveness.
- Implementation of stringent quality and environmental management systems through international standard certifications. The attainment of multiple certifications including QS9000, ISO14001, ISO/TS 16949, IATF 16949, and OHSAS 18001 demonstrates the company's commitment to product reliability and corporate sustainability.Implementation of stringent quality and environmental management systems through international standard certifications. The attainment of multiple certifications including QS9000, ISO14001, ISO/TS 16949, IATF 16949, and OHSAS 18001 demonstrates the company's commitment to product reliability and corporate sustainability.
- A customer-centric management philosophy and the cultivation of win-win cooperative relationships. The company emphasizes continuous efforts for customer satisfaction and horizontal, cooperative relationships with its partners. Adherence to employee respect and ethical management practices guides transparent and fair corporate operations.A customer-centric management philosophy and the cultivation of win-win cooperative relationships. The company emphasizes continuous efforts for customer satisfaction and horizontal, cooperative relationships with its partners. Adherence to employee respect and ethical management practices guides transparent and fair corporate operations.
- Automotive Industry (Engine, Transmission, Chassis Parts Manufacturing)Automotive Industry (Engine, Transmission, Chassis Parts Manufacturing)
- Speed Boat Parts ManufacturingSpeed Boat Parts Manufacturing
- Motorcycle Parts ManufacturingMotorcycle Parts Manufacturing
- Refrigerator Parts Manufacturing (applying precision machining technology)Refrigerator Parts Manufacturing (applying precision machining technology)
- India (Chennai local subsidiary operation)India (Chennai local subsidiary operation)
- SlovakiaSlovakia
- MexicoMexico
- QS9000 Certification (1999)QS9000 Certification (1999)
- ISO14001 Certification (2001)ISO14001 Certification (2001)
- ISO/TS 16949 Certification (2004)ISO/TS 16949 Certification (2004)
- OHSAS 18001 Certification (2013)OHSAS 18001 Certification (2013)
- IATF 16949 Certification (2018)IATF 16949 Certification (2018)
- Factory KS Mark Acquisition (1990)Factory KS Mark Acquisition (1990)
- Technical Alliance for Hydraulic AUTO-TENSIONER Patent (Japan TSUBAKIMOTO, 1994)Technical Alliance for Hydraulic AUTO-TENSIONER Patent (Japan TSUBAKIMOTO, 1994)
- Possession of proprietary technology based on multiple patentsPossession of proprietary technology based on multiple patents
- Establishment of Technical Research Institute (1996)Establishment of Technical Research Institute (1996)