High Moment Capacity
Robust bearing support carries heavy loads and sidewall forces alike, so the actuator — not an external structure — absorbs the moment loads your application generates.
Compact power for tight envelopes
SRB Series hydraulic rotary actuators
A space-saving series for weight- and envelope-critical applications where every pound and inch counts.
Overview
Inside the SRB Series
The SRB Series concentrates the SungJi helical gear design into its most compact form. Fewer components and a space-efficient architecture make it the right choice when the rotation drive has to disappear into a tight mounting envelope — or when actuator weight comes straight out of payload.
Like every SJH series, the SRB runs on oil-immersed, self-lubricating bearings and is sealed against dust and rain, so the compact package gives up nothing in service life.
Series Benefits
The SJH advantages, in every SRB unit
Long Service Life
Oil-immersed bearings, high-precision assembly, and sealing that keeps out dust and rain add up to actuators that keep working season after season, in the environments that wear competitors out.
No Grease Filling Required
Because the bearings run immersed in oil, they lubricate themselves. No grease points, no lube schedules, no missed maintenance — a real advantage for rental fleets and remote equipment.
Light and Compact
A space-efficient helical gear design with fewer components delivers the same — or more — torque from a lighter, smaller package, freeing up payload and simplifying your mounting envelope.
Free Over-Run Protection
Paired with a counterbalance valve, rotation stops the instant the maneuvering bar stops — no drift, no coasting, and no external brakes to buy, mount, or maintain.
Built-In Overload Protection
The counterbalance valve reacts instantly to external shocks, relieving pressure spikes before they reach your equipment — protecting the actuator, the attachment, and the carrier.
Specifications
SRB Series specifications
⚠ [SPECS TO BE INSERTED FROM CATALOG] — the table below is a
placeholder structure. Replace the rows in
src/data/products.ts with real catalog data.
| Model | Output Torque @ 3,000 psi | Max Moment Load | Standard Rotation | Weight |
|---|---|---|---|---|
| SRB-[SPEC] | [SPEC] | [SPEC] | [SPEC] | [SPEC] |
| SRB-[SPEC] | [SPEC] | [SPEC] | [SPEC] | [SPEC] |
| SRB-[SPEC] | [SPEC] | [SPEC] | [SPEC] | [SPEC] |
Dimensions are for reference only. Certified prints supplied upon order.
Other Series
Also in the SJH line
Ready to spec the SRB Series?
Send us your torque and moment requirements and we'll confirm sizing, interchangeability with your current unit, and pricing — fast.