HMR1 series · spec 500 · Helical, flange-mount family
HMR1-500 helical rotary actuator
5,100 Nm driving torque at 210 bar, 90° / 180° / 270° / 360° rotation, in flange mount. The HMR1-500 is 6th of 15 sizes in the HMR1 flange-mount range, built to order for general positioning, swing and clamping duties where the actuator face-bolts to a machined flange on the machine, and the same housing is specified across four standard rotations.
It sits between HMR1-250 at 2,500 Nm and HMR1-700 at 7,100 Nm.
Specifications — HMR1-500
| Rated driving torque | 5,100 Nm |
|---|---|
| Rated pressure | 210 bar |
| Rotation | 90° / 180° / 270° / 360° |
| Mounting | FL — Flange (standard) |
| Output shaft | KS / SS / KB / BS |
| Valve options | NV / CB / CS |
| Ordering pattern | HMR1-{spec}-{angle}-{output}-{valve} |
| Example order code | HMR1-020-180-KS-CS |
HMR1 is rated at 210 bar continuous; the flange pilot diameter and bolt circle are what decide whether the unit sits square on your existing bracket. HMR1 covers 90°, 180°, 270° and 360° as standard rotations; the flange mount is implicit in the order code.
What the code means
Every HMR1 unit is specified the same way. If your tag carries a different suffix, the base size is still HMR1-500.
| HMR1 | Series — helical rotary actuator, flange-mount family, 210 bar rated |
|---|---|
| 500 | Spec size — 5,100 Nm driving torque class |
| 90 / 180 / 270 / 360 | Rotation — total travel in degrees |
| FL | Mounting — flange |
| KS / SS / KB / BS | Output — KS keyed solid shaft / SS splined solid shaft / KB keyed hollow shaft / BS bolted flange shaft |
| NV / CB / CS | Valve — integral valve block or plain ports |
Where HMR1-500 sits in the HMR1 range
The nearest sizes either side of HMR1-500. If your load is borderline, these are the two builds worth checking before you commit to a size. See the full HMR1 range →
Cross reference
Models customers compare with HMR1-500
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 |
|---|---|---|
| HKS | DA-H 125 | See the DA-H 125 page |
| HKS | I-DA-H 125 | See the I-DA-H 125 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
HMR1-500 questions
What can I use in place of an HMR1-500?
We build the HMR1-500 itself to order, and where an HMR1-500 is no longer available we quote the closest HM HMR1 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 HMR1-500 a direct replacement for HKS DA-H 125?
No — we do not claim a verified drop-in for any other make. Enquiries for this torque class arrive tagged as HKS DA-H 125, HKS I-DA-H 125; we treat those as comparable references and compare rated torque, mounting interface, shaft and ports before quoting the HMR1-500 build that suits your machine.
How is the HMR1-500 order code put together?
The pattern is HMR1-{spec}-{angle}-{output}-{valve}. A worked example is HMR1-020-180-KS-CS. 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 HMR1-500, quote the matching build and give you a delivery date.
Request a quote for HMR1-500