Precision manufacturing, personal support
SungJi Hydraulics N.A. brings a patented Korean-engineered rotary actuator line to the US and Canada — with the application engineering to back it up.
Two teams, one standard
SungJi Hydraulics (SJH) is a South Korean manufacturer of helical gear type hydraulic rotary actuators. Our 60-person manufacturing team builds every unit with high-precision assembly and rigorous quality control — producing actuators that deliver more torque and carry higher moment loads than the competitor units they replace, from a lighter package with identical outside dimensions.
That design is no accident: it's protected by U.S. and international patents. The externally interchangeable envelope means customers can upgrade without redesigning a single mount; the patented internals are why they never want to switch back.
SungJi Hydraulics N.A., based in Cranberry Township, Pennsylvania, is the six-person sales and technical team serving the United States and Canada. When you call, you reach people who can size your application, confirm interchangeability, and get certified prints moving — not a phone tree.
Lowering your total cost of ownership
We deliver hydraulic rotary actuators that exceed industry quality standards — on time, priced right, and backed by expert engineering support. Fewer failures, zero grease maintenance, and fast technical answers add up to the lowest total cost of ownership in the category.
What we hold ourselves to
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Quality
Every actuator leaves our factory built to exceed industry standards — because our name rotates with your equipment.
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Teamwork
Manufacturing in Korea and engineering support in North America operate as one team with one goal: your application, solved.
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Honesty & Integrity
Straight answers on sizing, lead times, and pricing. If our product is not the right fit, we will tell you.
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Respect & Dignity
We treat customers, partners, and each other the way precision work demands — with care and respect.
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Innovation & Improvement
Our patented helical gear design exists because we kept asking how a rotary actuator could be better. We still are.
The people behind the product
Six specialists in North America. Sixty builders in South Korea. One standard of work.
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Ready to spec a better rotary actuator?
Send us your application details and our North American engineering team will size the right series, confirm interchangeability with your current unit, and quote it — fast.