SUNGJI SOURCING
SRA-110 Rotary Actuator
The Sungji SRA-110 is a helical hydraulic rotary actuator from Sungji (SJH, Korea), rated at about 735.5 Nm output torque at 210 bar. In the controlled cross-reference it sits in the ~735.5 Nm torque class together with: HKS M-DA-H 63. These are same-torque-class engineering references only. HM Hydraulics provides technical selection support and sourcing / alternative-supply service for this reference. We do not hold it as a stocked SKU and do not promise stock, lead time or confirmed availability; configuration, mounting dimensions and drawings are checked on request against your actuator nameplate before any quotation.
Sungji SRA series helical rotary actuator
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Independently sourced / alternative-supply service — not represented as an original Sungji part. Interchangeability is verified against your unit and drawing before ordering.
Same base, other builds
Other configurations of this size
One base size is built in several mountings, angles and valve arrangements. If your unit carries a different code from the one on this page, start from the closest build below.
What the 180° sweep changes on this build
A half-turn build: the output travels 180° between two end stops. The sweep is set by the internal stop tube, so a 180° unit cannot be turned into a 360° one by changing the valve or the porting — it is a different internal assembly.
- Two positions, 180° apart — confirm the linkage does not rely on an intermediate stop.
- Hoses only travel half a turn, so a short service loop is normally enough.
- If the duty is a tilt or a quarter-turn swing, this is the sweep the linkage was designed around.
When this sweep is the right build
- Tilt and positioning linkages that only need two end positions — a bucket tilt, a boom offset, a chute flap.
- Machines where the hose run is tight: half a turn needs a much shorter service loop than a full one.
- Where a mid-position stop is not part of the function, so the two end stops are the whole travel.
Confirming the sweep on the machine
- Swing the linkage by hand to both end stops and check the travel is a clean half turn with no mid-travel detent.
- Read the stop positions off the mounting drawing rather than counting turns of the output.
How the sweep sits in the order code
The sweep is the fifth segment of the code. Ordering the same size in the other sweep changes that segment and the internal stop tube behind it; the flange pattern, the shaft end and the valve selection do not change with it. That is why a half-turn build and a full-turn build of one size are quoted as two builds rather than one with an option.
Where these two builds get mixed up
- A half-turn unit is sometimes quoted against a full-turn drawing because the size and mounting match — the sweep is the field that gets dropped in the enquiry.
- A half-turn unit cannot be re-stopped to a full turn in service; if the machine needs more travel, it needs the other build.
At a glance
Quick reference
- Original model
- SRA-110
- Original brand
- Sungji
- Type
- Rotary actuator
- Rotation
- 180°
- Rated torque
- 735.5 Nm
- Weight
- 14.8 kg @180°
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 180° |
| Rated torque | 735.5 Nm |
| Unit weight | 14.8 kg @180° |
| Cross reference | All references below are engineering cross-references by torque class from HM's controlled multi-brand database; they are not validated substitutions. Same torque class (comparable rated output; independent housing and mounting designs - do not assume matching dimensions): HKS M-DA-H 63 (~735.5 Nm). Performance neighbours only, not the same anchor class: Helac L10-5.5 (~622 Nm, -15%). HM has no supply-verified interchange record for any of these pairings, so the highest claim we make is 'same torque class / comparable'; nothing is presented as a verified interchangeable unit. |
| Further data | Torque, pressure, port and mounting dimensions are shared with the engineering drawing on request. |
HM alternative model — confirmed on inquiry. Send us your original model number, part number or machine details and we confirm the matching configuration, specifications and compatibility, then quote. The exact ordering code — rotation, output and valve arrangement — is confirmed against your unit and is not published online.
Other sizes in the SRA range
| Model | Torque | Weight |
|---|---|---|
| SRA-080 | 196.1 Nm | 7.1 kg @180° |
| SRA-110 (this size) | 735.5 Nm | 14.8 kg @180° |
SRA-110 is the largest size in the SRA range at 735.5 Nm.
Questions
Frequently asked questions
What does the SRA-110 replace?+
It is the original Sungji model code for a helical hydraulic rotary actuator providing 180° rotation. HM provides sourcing and alternative-supply support for this reference; it is not assumed to be an original Sungji part or a pre-verified interchangeable unit, and the configuration is confirmed against your actuator nameplate and drawing before we quote. HM can source or arrange alternative supply for this reference; mounting dimensions, shaft, ports and the exact configuration are checked against your unit and drawing before any alternative is recommended.
What does the Sungji code SRA-110 mean, and can HM source it?+
The short code gives the family and bore size; a full ordering code adds rotation, valve/port, mounting, shaft cover and seal/standard segments, so the nameplate tells us the exact build to quote. HM can source or arrange alternative supply for this standard build after confirming the exact configuration from your nameplate; we do not hold it as stock or promise lead time.
Does it match the Helac / HKS / Moveco unit listed in the same torque class?+
They are same-torque-class engineering references only; housings, mounts and published moment figures differ (some Sungji sizes are rated stronger). We do not claim a verified drop-in or guaranteed compatibility without checking the drawing, mounting dimensions, shaft and ports against your unit.
What information does HM need before quoting this actuator?+
Send us the actuator nameplate (brand, full model code, rotation, mounting, shaft and port details) and, if available, a mounting drawing. HM then confirms the exact configuration and advises the available sourcing or alternative-supply option. Mounting dimensions and drawings are provided on request only. Valve port (7/16-20 UNF vs G1/4), no-valve, double-flange, mounting style and special-seal variants are distinct order codes; the exact build is confirmed from your nameplate.
Why is the exact HM model and price not shown?+
We confirm the HM model per inquiry after verifying the interface and operating parameters with you. This avoids shipping a part that looks right by model name but differs in mounting or rotation. Price is provided with that confirmed quote.
Related models
Request sourcing
Need a source for SRA-110?
Send the original Sungji model number, the OEM part number (if available), machine details or a mounting drawing. We confirm the configuration and advise the available sourcing or alternative-supply option before quoting.
- Original model / part number
- Machine brand & model
- Quantity & annual demand
- Mounting photo or drawing (if available)
Or email directly: hm@hmhydraulics.com