HKS SOURCING
M-DA-H-F7 70 Rotary Actuator
The HKS M-DA-H-F7 70 is a mobile-version helical hydraulic rotary actuator in HKS's M-DA-H programme (German maker). HKS uses its own bore/housing size numbers; the code is a size designation, not a torque figure and not a Helac size number, rated at about 500 Nm output torque at 210 bar. In the controlled cross-reference it sits in the ~509 Nm torque class together with: Helac L20-4.5; Moveco RP17; Sungji SRB-080. 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.
HKS M-DA-H-F7 (mobile housing variant) series helical rotary actuator
Specifying a new program? Talk to our engineering team →
Independently sourced / alternative-supply service — not represented as an original HKS part. Interchangeability is verified against your unit and drawing before ordering.
HM Model Reference
HMR2-050 — HM's closest model in the 508 Nm class
This reference sits in the 508 Nm class. The closest HM model is HMR2-050 — Helical, L20-style foot mount — 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
M-DA-H-F7 70
HM Model Reference
HMR2-050
Rated torque
Rated pressure
Rotation
Mounting
Output shaft
Valve options
| Original M-DA-H-F7 70 | HM HMR2-050 | |
|---|---|---|
| Rated driving torque | 500 Nm | 508 Nm |
| Rated pressure | Not verified | 210 bar |
| Rotation | 180° | 180°; stop at 90° available |
| Mounting | Not verified — confirm on unit | FT — Foot |
| Output shaft | Not verified — confirm on unit | 1F — Single flange shaft / 2F — Double flange shaft |
| Valve options | Not verified — confirm on unit | NV / CB / CS |
| Ordering pattern | Not applicable | HMR2-{spec}-180-FT-{output}-{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 (508 Nm) at HM's 210 bar rating.
- Helical, L20-style foot mount architecture.
- Rotation: 180° available on the HMR2 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.
M-DA-H-F7 70
HKS DA-H family
| Segment | Field | What it tells you |
|---|---|---|
| M-DA-H-F7 | Series / mounting | M-DA-H-F7 — foot-mount variant of the DA-H body |
| 70 | Size | Size number 70 — sets the displacement and the torque class |
Valve, seal and shaft options on HKS units are coded inside the FU / S9xxxx material number, not in the model code — those are confirmed from the tag or the material list.
Full ordering key and how to read a tag: identifying a rotary actuator.
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.
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
- M-DA-H-F7 70
- Original brand
- HKS
- Type
- Rotary actuator
- Rotation
- 180°
- Rated torque
- 500 Nm
- Weight
- 12.8 kg @180°
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 180° |
| Rated torque | 500 Nm |
| Unit weight | 12.8 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): Helac L20-4.5 (~509 Nm); Moveco RP17 (~509 Nm); Sungji SRB-080 (~509 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.
Other sizes in the M-DA-H-F7 (mobile housing variant) range
| Model | Torque | Weight |
|---|---|---|
| M-DA-H-F7 70 (this size) | 500 Nm | 12.8 kg @180° |
| M-DA-H-F7 85 | 930 Nm | 17 kg @180° |
| M-DA-H-F7 120 | 1700 Nm | 31 kg @180° |
| M-DA-H-F7 145 | 4400 Nm | 79.6 kg @180° |
M-DA-H-F7 70 is the smallest size in the M-DA-H-F7 (mobile housing variant) range at 500 Nm.
Questions
Frequently asked questions
What does the M-DA-H-F7 70 replace?+
It is the original HKS 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 HKS 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.
Can HM supply the HKS M-DA-H-F7 70?+
HM provides technical selection and a sourcing / alternative-supply route for the HKS M-DA-H-F7 70 base size. We do not keep stock and do not promise availability or lead time; the exact HKS configuration (S1/S2, rotation direction, valve and seal options folded into the FU/S9xxx code) is confirmed against your nameplate, with the factory when needed, before we quote.
Is the M-DA-H-F7 70 a one-to-one replacement for the Helac-class unit in the same torque bracket?+
They sit in the same torque class in our controlled cross-reference, but HKS uses its own bore/housing design and dimensions. We do not claim a verified drop-in or a guaranteed-compatible unit from the model number alone; rotation, mounting interface, shaft and ports are checked against your unit and drawing first.
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. HKS folds valve and seal options into the FU requirement code and the S9xxx material number; a complete HKS order code must be confirmed with HKS for each requirement (torque, rotation, S1/S2, rotation direction, valve, seal).
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 M-DA-H-F7 70?
Send the original HKS 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