HMR3 series · spec 280 · Helical, compact front-flange family
HMR3-280 helical rotary actuator
2,825 Nm driving torque at 210 bar, 180° / 360° rotation, in front-flange mount. The HMR3-280 is 6th of 6 sizes in the HMR3 compact front-flange range, built to order for tight mounting envelopes on aerial work platforms and small booms, where the front flange face carries the load and the body sits inside the boom section.
It is the largest size in the HMR3 range, above HMR3-160 at 1,695 Nm.
Specifications — HMR3-280
| Rated driving torque | 2,825 Nm |
|---|---|
| Rated pressure | 210 bar |
| Rotation | 180° / 360° |
| Mounting | FF — Front flange (standard) |
| Output shaft | 1F |
| Valve options | NV / CB / CS |
| Ordering pattern | HMR3-{spec}-{angle}-FF-1F-{valve} |
| Example order code | HMR3-030-180-CB |
HMR3 is rated at 210 bar continuous; the flange bolt pattern and pilot diameter decide whether it drops onto your existing bracket. HMR3 is offered in 180° and 360° as standard rotations.
What the code means
Every HMR3 unit is specified the same way. If your tag carries a different suffix, the base size is still HMR3-280.
| HMR3 | Series — helical rotary actuator, compact front-flange family, 210 bar rated |
|---|---|
| 280 | Spec size — 2,825 Nm driving torque class |
| 180 / 360 | Rotation — total travel in degrees |
| FF | Mounting — front flange |
| 1F | Output — 1F single flange shaft |
| NV / CB / CS | Valve — integral valve block or plain ports |
Where HMR3-280 sits in the HMR3 range
The nearest sizes either side of HMR3-280. If your load is borderline, these are the two builds worth checking before you commit to a size. See the full HMR3 range →
| Model | Driving torque | Rotation | Page |
|---|---|---|---|
| HMR3-160 | 1,695 Nm | 180° / 360° | HMR3-160 |
| HMR3-280this page | 2,825 Nm | 180° / 360° | — |
Cross reference
Models customers compare with HMR3-280
These are the models that sit in the same torque class and come up in the same enquiries. They are comparable references, not validated substitutions — we confirm the mounting pattern, shaft and port details against your unit before quoting.
| Make | Model | Reference page |
|---|---|---|
| Helac | L10-25 | See the L10-25 page |
| HKS | M-DA-H 100 | See the M-DA-H 100 page |
Comparable performance based on rated torque class for engineering comparison. The mounting interface must be confirmed by our engineering team before quotation.
What we check before quoting
On the unit
- Mounting pattern and bolt spacing
- Shaft type, spline or keyway, and length
- Port size, thread form and valve arrangement
On the machine
- Available envelope and tie-rod clearance
- Working pressure and flow at the actuator
- Rotation stops and any mechanical limits
HMR3-280 questions
What can I use in place of an HMR3-280?
We build the HMR3-280 itself to order, and where an HMR3-280 is no longer available we quote the closest HM HMR3 build and confirm the fit against your unit. We do not publish a one-to-one substitution table, because mounting pattern, shaft, port thread and valve arrangement have to match your machine, not just the torque class.
Is HMR3-280 a direct replacement for Helac L10-25?
No — we do not claim a verified drop-in for any other make. Enquiries for this torque class arrive tagged as Helac L10-25, HKS M-DA-H 100; we treat those as comparable references and compare rated torque, mounting interface, shaft and ports before quoting the HMR3-280 build that suits your machine.
How is the HMR3-280 order code put together?
The pattern is HMR3-{spec}-{angle}-FF-1F-{valve}. A worked example is HMR3-030-180-CB. Rotation, mount, output and valve are chosen per machine, so the code on your drawing is what we build to.
Still identifying the unit? Start with how to identify a rotary actuator or the cross-reference guide.
Send your tag and mounting drawing
We confirm the fit against HMR3-280, quote the matching build and give you a delivery date.
Request a quote for HMR3-280