HELAC ALTERNATIVE
HP50-MS-RL-230-S1-C-H Rotary Actuator
Alternative heavy-duty rotary actuator for the Helac HP50-MS-RL-230-S1-C-H, a large 230-degree, rail/slide-mount (RL) helical actuator built for mining drill-rig duty. It is listed by Atlas Copco / Epiroc under part numbers 3128312643 and 3129316303 (also written 3128-3126-43 and 3129-3163-03).
Atlas part number
3128312643
Alternative rotary actuator for Helac HP50-MS-RL-230-S1-C-H — also listed as 3129316303.
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Independently supplied alternative — not an original Helac or Atlas part. Compatibility is verified before ordering.
At a glance
Quick reference
- Original model
- HP50-MS-RL-230-S1-C-H
- Original brand
- Helac
- Type
- Rotary actuator
- Rotation
- 230°
- Original part no.
- 3128312643, 3129316303
Equipment reference
Known applications
Part numbers 3128312643 and 3129316303 are commonly associated with several Atlas Copco / Epiroc Boomer and Simba drill rigs. A single rig range can carry more than one turning device depending on serial number, position and build, so please confirm the fit against your machine serial number and the actuator nameplate before ordering.
If your machine is not listed, send the full model and serial number — other builds may use the same actuator.
Confirmed data only
Technical specifications
| Product type | Hydraulic rotary actuator |
|---|---|
| Rotation angle | 230° |
| Cross reference | The HP50-MS-RL-230 is a heavy mining build of the Helac HP series. HM confirms the exact configuration, mounting and compatibility against the unit nameplate and a drawing or photo before a replacement is supplied; ratings are not assumed from the HP number 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 HM model is not published online.
Questions
Frequently asked questions
What does the HP50-MS-RL-230-S1-C-H replace?+
It is the model code for a Helac helical rotary actuator providing 230° rotation. It is listed by Atlas under part numbers 3128312643, 3129316303. Our alternative is matched to the same rotation and mounting interface.
How do I know this fits my machine?+
The same actuator is recorded on the Boomer 104, Boomer K41, Boomer K41x, Simba H1257, Simba H157, Simba S7D. Before quoting we confirm the mounting face, port position and rotation against the tag and a photo of your unit, so the replacement matches your exact build.
What is the difference between 3128312643 and 3129316303?+
Both Atlas Copco / Epiroc references are recorded against the same Helac HP50-MS-RL-230-S1-C-H turning-device configuration for mining drill rigs; the two numbers can appear across different machine builds or parts-list revisions. Send the tag from your unit and we confirm which reference and build applies before quoting.
Will this fit a Boomer 104, K41 or K41x?+
The HP50-MS-RL-230 actuator is commonly listed on the Boomer 104, K41 and K41x as well as Simba H1257, H157 and S7D rigs, but these ranges use several different turning devices in different positions and serial-number builds. We confirm the mounting face, rail arrangement, ports and 230-degree rotation against your nameplate and a photo or drawing before recommending a replacement.
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