HELAC ALTERNATIVE
HTX70-MS-RF-360-SS-O-H Rotary Actuator
Alternative rotary actuator for the Helac HTX70-MS-RF-360-SS-O-H, a splined-shaft 360-degree helical actuator listed by Atlas under part number 3128307978, supplied for aftermarket replacement.
Atlas part number
3128307978
Alternative rotary actuator for Helac HTX70-MS-RF-360-SS-O-H.
Independently supplied alternative — not an original Helac or Atlas part. Compatibility is verified before ordering.

At a glance
Quick reference
- Original model
- HTX70-MS-RF-360-SS-O-H
- Original brand
- Helac
- Type
- Rotary actuator
- Rotation
- 360°
- Original part no.
- 3128307978
Equipment reference
Known applications
This actuator is associated with the following Atlas Boomer and Simba rigs. Confirmation against your machine build plate is recommended.
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 | 360° |
| 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 HTX70-MS-RF-360-SS-O-H replace?+
It is the model code for a Helac helical rotary actuator providing 360° rotation. It is listed by Atlas under part number 3128307978. 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 H157. 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.
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
