HELAC ALTERNATIVE
T20-25-E-FT-220-S1-C-H Rotary Actuator
Alternatives & cross-reference · 220° · 2,825 Nm at 207 bar
Looking for an alternative to the Helac T20-25 rotary actuator? This page covers the 220° foot-mount catalog configuration of the T-series dual splined-output-shaft build, with a rated output torque of approximately 2,825 Nm at 207 bar. HM can help review your unit tag, mounting drawings and operating requirements before proposing a suitable solution.
Independently supplied alternative — not an original Helac part. Configuration and fit are confirmed against your unit tag and drawing before ordering.
Cross-reference
Alternatives for Helac T20-25
Compare this unit with other brands at a similar performance level — then send us your tag and mounting drawing and we confirm which option actually fits.
| Brand | Model / series | Key specification |
|---|---|---|
| Helac | T20-25T20-25-E-FT-220-S1-C-H | 2,825 Nm · 220° |
| Sungji | SRS-115 | Similar torque class |
Alternative models are compared by published performance specifications. Mounting dimensions and compatibility must be confirmed before ordering.
What HM checks before recommending a fit
Mounting dimensions
Foot / flange pattern, bolt circle and overall envelope.
Shaft interface
Shaft type, spline / key, diameter and flange arrangement (S1/S2).
Rotation & stops
Rotation angle, end stops and cushioning for your mechanism.
Hydraulic connections
Port size/standard (SAE/UNF), position and counterbalance valve.
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
T20-25-E-FT-220-S1-C-H
HM Model Reference
HMR6-280
Rated torque
Rated pressure
Rotation
Mounting
Output shaft
Valve options
| Original T20-25-E-FT-220-S1-C-H | HM HMR6-280 | |
|---|---|---|
| Rated driving torque | 2,825 Nm | 2,830 Nm |
| Rated pressure | 3,000 psi (207 bar) | 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.
Code anatomy
What each part of this code means
Every segment below is read from the manufacturer’s published ordering key. Where a segment is not published, we say so instead of guessing — those are the ones to confirm from the tag or the drawing before ordering.
T20-25-E-FT-220-S1-C-H
T20 series
| Segment | Field | What it tells you |
|---|---|---|
| T20 | Series | T20 series — frame size and mounting family |
| 25 | Model size | Size 25 — rated drive torque is set by this number (thousand in-lb class in the L/T key) |
| E | Measurement system | English system — SAE/UNF threads, SAE ports |
| FT | Housing / mounting | Foot mount |
| 220 | Rotation | Non-standard rotation angle (220°) — special build |
| S1 | Shaft / flanges | Cantilever — shaft flange only (single) |
| C | Valve | Counterbalance valve fitted |
| H | Seals and bearings | Standard seals and bearings |
Full ordering key and how to read a tag: identifying a rotary actuator.
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
- Catalog configuration
- T20-25-E-FT-220-S1-C-H
- Original brand
- Helac
- Type
- Rotary actuator
- Rotation
- 220°
- Output torque @207 bar
- 2,825 Nm
- Unit weight
- 33.6 kg
- Mounting styles
- FT foot mount · dual splined output shafts (straddle)
Reference only · original manufacturer data
What the original catalogue lists for T20-25 (2,500 in-lb class)
The figures below are the original manufacturer's published catalogue values, kept here so you can compare them with the HM model reference above. They are not HM performance data and they are not a statement of interchangeability.
+Show original catalogue figures (Helac T-series catalog, p. 18)
| Product type | Hydraulic helical rotary actuator |
|---|---|
| Series / size | T20 series · T20-25 (2,500 in-lb class) |
| Catalog configuration | T20-25-E-FT-220-S1-C-H |
| Rotation angle | 220° |
| Rated operating pressure | 207 bar |
| Output (drive) torque @ rated pressure | 2,825 Nm |
| Holding torque | 6,125 Nm |
| Moment capacity — straddle (S2) | 4,238 Nm |
| Axial load capacity | 2,041 kg |
| Radial load capacity | 2,041 kg |
| Displacement per cycle | 775.1 cm³ |
| Unit weight | 33.6 kg |
| Available mounting styles | FT foot mount · dual splined output shafts (straddle) |
| This build | E = English/SAE threads & ports · FT foot mount · 220° rotation · S1 single (cantilever) flange · C counterbalance valve · H standard seals & bearings |
Send us your nameplate and mounting drawing. HM reviews the configuration and cross-brand options, confirms the fit, then quotes the matching unit and price.
Other models in the Helac T20 range
Questions
Frequently asked questions
What does the T20-25-E-FT-220-S1-C-H replace?+
T20-25-E-FT-220-S1-C-H is a 220° Helac L-series helical rotary actuator configuration derived from the Parker/Helac HY34-1001 ordering key and Helac T-series catalog, p. 18. It is assembled per the catalog ordering rules rather than read from a specific nameplate, so the exact configuration and compatibility are confirmed against the original unit tag and mounting drawings; our alternative is matched only after that review. Send your tag code or a drawing and we confirm the exact build before quoting.
Is T20-25-E-FT-220-S1-C-H a confirmed factory order code?+
This T-series configuration is derived from the Parker/Helac HY34-1001 ordering key (T20-25 frame, T series with dual splined output shafts, E English/SAE, FT mount, 220° rotation, S1 single/cantilever flange, C counterbalance valve, H standard seals & bearings) and the published T-series performance data. It is a catalog configuration assembled per the ordering rules rather than a code independently verified from a nameplate; the exact build is confirmed against the Helac selection sheet, the original unit tag and the mounting drawing before we quote.
Can I use the Sungji SRS-115 as a direct replacement?+
The listed alternative is at a similar published torque level, but it is built to its own frame and mounting dimensions, so a similar rating does not guarantee a fit. Send us your unit tag and mounting drawing — we overlay the flange, shaft, ports and rotation and confirm whether it is a suitable option for your machine.
What is special about the T-series dual splined shaft build?+
The T series uses two splined output shafts for straddle mounting, so the published moment figure is the straddle (double-support) rating rather than a cantilever value. Send your tag code and mounting drawing and we confirm the shaft, flange, ports and rotation against the available T-series builds before quoting.
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 a replacement review
Need a replacement for T20-25?
Send your existing unit's nameplate and a mounting drawing. HM reviews the configuration and possible alternatives, confirms mounting and compatibility, and recommends the best available sourcing option for your machine.
- Original model / part number
- Machine brand & model
- Quantity & annual demand
- Mounting photo or drawing (if available)
Or email directly: hm@hmhydraulics.com