HELAC ALTERNATIVE
L30-65-S-RF-180-S1-C-H Rotary Actuator
Alternative rotary actuator for the Helac L30-65-S-RF-180-S1-C-H, a 180-degree, rear-flange (RF) helical actuator in the L30-65 mining class, in the 107 kg weight band. It is listed by Atlas Copco / Epiroc under part number 3128312607 (also written 3128-3126-07) in the supplier cross-reference list. This is the 180-degree rear-flange sibling of the better-documented 360-degree L30-65-RF build.
Atlas part number
3128312607
Alternative rotary actuator for Helac L30-65-S-RF-180-S1-C-H.
Specifying a new program? Talk to our engineering team →
Independently supplied alternative — not an original Helac or Atlas part. Compatibility is verified before ordering.
HM Model Reference
HMR4-750 — HM's closest model in the 7,340 Nm class
This reference sits in the 7,340 Nm class. The closest HM model is HMR4-750 — Helical, L30-style heavy-duty — 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
L30-65-S-RF-180-S1-C-H
HM Model Reference
HMR4-750
Rated torque
Rated pressure
Rotation
Mounting
Output shaft
Valve options
| Original L30-65-S-RF-180-S1-C-H | HM HMR4-750 | |
|---|---|---|
| Rated driving torque | Not verified | 7,340 Nm |
| Rated pressure | Not verified | 210 bar |
| Rotation | 180° | 180° / 360°; stop at 90° available |
| Mounting | Not verified — confirm on unit | FT — Foot / FF — Front flange / RF — Rear flange |
| 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 | HMR4-{spec}-{angle}-{mount}-{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 (7,340 Nm) at HM's 210 bar rating.
- Helical, L30-style heavy-duty architecture.
- Rotation: 180/360° available on the HMR4 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.
Same base, other builds
Other configurations of this size
One base size is built in several mountings, angles and valve arrangements. If your unit carries a different code from the one on this page, start from the closest build below.
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.
L30-65-S-RF-180-S1-C-H
L30 series
| Segment | Field | What it tells you |
|---|---|---|
| L30 | Series | L30 series — frame size and mounting family |
| 65 | Model size | Size 65 — rated drive torque is set by this number (thousand in-lb class in the L/T key) |
| S | Measurement system | Special / custom build (older tags use S for special) — not a standard E or M unit |
| RF | Housing / mounting | Rear flange |
| 180 | Rotation | Standard 180° rotation |
| 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 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
- L30-65-S-RF-180-S1-C-H
- Original brand
- Helac
- Type
- Rotary actuator
- Rotation
- 180°
- Weight
- 107 kg
- Original part no.
- 3128312607
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 180° |
| Unit weight | 107 kg |
| Cross reference | L30-65 series performance per the published Helac class, with the exact 180-degree rear-flange build, ports and mounting confirmed against the unit tag and drawing before a replacement is supplied. The rotation angle must not be assumed from the rig model alone. |
| 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 models in the Helac L30 range
Showing 8 of 17 other models in this range.
Questions
Frequently asked questions
What does the L30-65-S-RF-180-S1-C-H replace?+
It is the model code for a Helac helical rotary actuator providing 180° rotation in the 107 kg class. It is listed by Atlas under part number 3128312607. Our alternative is matched to the same rotation, 107 kg class and mounting interface.
What is Atlas Copco / Epiroc part 3128312607?+
Part 3128312607 is recorded against the Helac L30-65-S-RF-180-S1-C-H, the 180-degree rear-flange build of the L30-65 mining actuator, in the 107 kg class. Send the tag from your unit and we confirm the 180-degree rotation, rear-flange mounting and ports before quoting.
Is the L30-65-RF-180 the same as the L30-65-RF-360?+
They share the same L30-65 rear-flange family but are different rotation-angle builds: this unit rotates 180 degrees, while the RF-360 builds (such as Atlas 3128312644) rotate 360 degrees. The angle, end stops and porting differ, so they are not interchangeable; confirm the rotation code on your nameplate before ordering.
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 check
Looking for an alternative to this model?
Send us the original model number, part number, machine model or a drawing. We check the available option and confirm specifications and compatibility for you.
- Original model / part number
- Machine brand & model
- Quantity & annual demand
- Mounting photo or drawing (if available)
Or email directly: hm@hmhydraulics.com