HKS SOURCING
M-DA-H 63 Rotary Actuator
The HKS M-DA-H 63 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 720 Nm output torque at 210 bar. The maker's table lists 180° / 360° builds for this base size. In the controlled cross-reference it sits in the ~735.5 Nm torque class together with: Sungji SRA-110. 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 (mobile) series helical rotary actuator
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Independently sourced / alternative-supply service — not represented as an original HKS part. Interchangeability is verified against your unit and drawing before ordering.
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 63
HKS DA-H family
| Segment | Field | What it tells you |
|---|---|---|
| M-DA-H | Series / mounting | M-DA-H — front-flange variant of the DA-H body |
| 63 | Size | Size number 63 — 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° / 360° sweep changes on this build
This reference is listed with more than one sweep. The sweep is part of the build identity, so the unit on the machine has to be identified by its own setting before anything is matched.
- 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.
At a glance
Quick reference
- Original model
- M-DA-H 63
- Original brand
- HKS
- Type
- Rotary actuator
- Rotation
- 180° / 360°
- Rated torque
- 720 Nm
- Weight
- 14.4 kg @180°; 18.8 kg @360°
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 180° / 360° |
| Rated torque | 720 Nm |
| Unit weight | 14.4 kg @180°; 18.8 kg @360° |
| 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): Sungji SRA-110 (~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 M-DA-H (mobile) range
| Model | Torque | Weight |
|---|---|---|
| M-DA-H 50 | 190 Nm | 7.4 kg @180° |
| M-DA-H 63 (this size) | 720 Nm | 14.4 kg @180° |
| M-DA-H 80 | 1073 Nm | 26.5 kg @180° |
| M-DA-H 90 | 1700 Nm | 43 kg @180° |
| M-DA-H 100 | 2900 Nm | 58 kg @180° |
At 720 Nm, M-DA-H 63 sits between M-DA-H 50 (190 Nm) and M-DA-H 80 (1073 Nm) in the M-DA-H (mobile) range.
Questions
Frequently asked questions
What does the M-DA-H 63 replace?+
It is the original HKS model code for a helical hydraulic rotary actuator providing 180° / 360° 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 63?+
HM provides technical selection and a sourcing / alternative-supply route for the HKS M-DA-H 63 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 63 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.
Request sourcing
Need a source for M-DA-H 63?
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