SUNGJI SOURCING
SRS-115 Rotary Actuator
The Sungji SRS-115 is a helical hydraulic rotary actuator from Sungji (SJH, Korea), rated at about 3049.9 Nm output torque at 210 bar. The SRS family is a fixed 220-degree, dual-spline-output, foot-mounted design. In the controlled cross-reference it sits in the ~2825 Nm torque class together with: Helac T20-25; Helac T30-27. 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 SRS (T class, dual spline, 220°) series helical rotary actuator
Specifying a new program? Talk to our engineering team →
Independently sourced / alternative-supply service — not represented as an original Sungji part. Interchangeability is verified against your unit and drawing before ordering.
HM Model Reference
HMR6-280 — HM's closest model in the 2,830 Nm class
This reference sits in the 2,830 Nm class. The closest HM model is HMR6-280 — Helical through-shaft, straddle mount only — matched on torque class only. The left column repeats what this reference's own record states, reproduced as published; the right column is HM's own rating. The table shows what carries over and what still has to be checked on your unit.
Original
SRS-115
HM Model Reference
HMR6-280
Rated torque
Rated pressure
Rotation
Mounting
Output shaft
Valve options
| Original SRS-115 | HM HMR6-280 | |
|---|---|---|
| Rated driving torque | 3049.9 Nm | 2,830 Nm |
| Rated pressure | Not verified | 210 bar |
| Rotation | 220° | 220° / 180°; stop at 90° available |
| Mounting | Not verified — confirm on unit | FT — Foot, straddle only (standard) |
| Output shaft | Not verified — confirm on unit | DS — Through double spline shaft (standard) |
| Valve options | Not verified — confirm on unit | NV / CB / CS |
| Ordering pattern | Not applicable | HMR6-{spec}-{angle}-FT-DS-{valve} |
Left column: this reference's own published figures, reproduced as recorded. Any field the record does not establish is marked “Not verified” and is never filled from HM data. Right column: HM's own rating at HM's stated pressure. Confirm both against the unit nameplate and mounting drawing before ordering.
What carries over
- HM torque class (2,830 Nm) at HM's 210 bar rating.
- Helical through-shaft, straddle mount only architecture.
- Rotation: 220/180° available on the HMR6 series. A 180/90 code is a 180° unit with the stop set at 90°, not a separate build.
What has to be verified
- Shaft / output flange interface and spline.
- Mounting bolt pattern and pilot register.
- Port size and position, plus valve arrangement (NV / CB / CS).
- Overall envelope and tie-rod clearance.
Comparable performance based on rated torque class for engineering comparison. The mounting interface must be confirmed by our engineering team before quotation.
What the 220° sweep changes on this build
A non-standard sweep: 220° sits outside the usual 180° / 360° range, which means the stop tube was cut for that angle. A standard-angle unit will not reproduce it, and the stop positions have to be read off the drawing rather than assumed.
- Read the stop positions off the mounting drawing before ordering — do not infer them from the code alone.
- Ask why the original used this sweep; a non-standard angle usually answers a linkage constraint that a standard unit will not fit.
- Confirm the sweep on the unit tag matches the code, since special builds are sometimes re-stopped in service.
When this sweep is the right build
- Linkages whose geometry was designed around this exact sweep — the stop positions usually answer a clearance or interference constraint.
- Rebuild work where the surrounding mechanism has to stay unchanged, so the sweep cannot be normalised to 180° or 360°.
- OEM builds where the sweep was specified by the machine maker rather than chosen from a catalogue.
Confirming the sweep on the machine
- Measure the swing between the mechanical end stops on the machine, not between the positions the linkage happens to use.
- Compare the measured swing with the code on the tag; special builds are sometimes re-stopped in service.
How the sweep sits in the order code
The sweep is the fifth segment of the code, and here it carries a value outside the standard range. That value is a build instruction, not a selection from a list: it has to travel with the enquiry together with the stop positions, because the stop tube is cut for it.
Where these two builds get mixed up
- A full-turn unit is sometimes quoted where the linkage only swings half a turn, which over-travels the hose loop for no benefit.
- If a full-turn unit will not pass a quarter or half turn under load, the cause is usually hose routing or an external stop, not the actuator.
We do not publish a conversion table between sweeps. If the sweep on your unit differs from the code above, send the tag and the mounting drawing and the build is confirmed against them.
Same torque class
Other references our customers compare with this one
These builds sit in the same torque class as the unit on this page. Same class does not mean interchangeable — the mounting interface, shaft and port arrangement are confirmed against your tag or drawing before quoting.
At a glance
Quick reference
- Original model
- SRS-115
- Original brand
- Sungji
- Type
- Rotary actuator
- Rotation
- 220°
- Rated torque
- 3049.9 Nm
- Weight
- 36.5 kg @180°
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 220° |
| Rated torque | 3049.9 Nm |
| Unit weight | 36.5 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): Helac T20-25 (~2825 Nm); Helac T30-27 (~2825 Nm). 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.
Questions
Frequently asked questions
What does the SRS-115 replace?+
It is the original Sungji model code for a helical hydraulic rotary actuator providing 220° 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 SRS-115 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.
Request sourcing
Need a source for SRS-115?
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