Roller screw actuator
Ewellix EMA-100 roller screw actuator
Modular heavy-duty electromechanical cylinder for hydraulic replacement, with 32/40 mm ball screw (EMA-100-1) or 30 mm roller screw (EMA-100-2-R) versions; series maximum 80 kN dynamic force, up to 890 mm/s and strokes up to 2,000 mm.
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Key specifications
| Ingress protection | IP54S standard, IP65 option |
|---|---|
| Temperature | -20–50 °C |
| Force (max) | 80,000 N |
| Stroke (max) | 2,000 mm |
| Linear speed (max) | 890 mm/s |
| Screw type | ball screw (EMA-100-1) or planetary roller screw (EMA-100-2-R) |
| Sizes | EMA-100-1 ball screw: 23-60 kN dynamic, up to 750 mm/s, 50-2,000 mm stroke, EMA-100-2-R roller screw: 80 kN dynamic, up to 890 mm/s, up to 1,300 mm stroke |
| Motor | customer servo motor or IEC AC induction motor; e-MOVEKIT 24 V DC package |
Summarised in our own words from Schaeffler AG's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1 · Source 2
Notes on this data
Schaeffler's bauma 2025 press release quotes up to 82 kN (roller screw) and up to 750 mm/s; the TPI 293 table gives 80 kN and 890 mm/s for EMA-100-2-R RB. Temperature -20 to +50 C is for EMA-100-1; roller-screw version 0 to +40 C.
Specify Motion is not affiliated with Schaeffler AG. Ewellix and EMA-100 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Ewellix EMA-100 replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Ewellix part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Steel-belt driven linear module with integral guide rail, intended as a long-stroke, high-speed replacement for pneumatic cylinders.
| Published maximum | EMA-100 | LB Belt-Drive Linear Actuator |
|---|---|---|
| Force | 80,000 N | — |
| Stroke | 2,000 mm | 3,050 mm meets or exceeds |
| Speed | 890 mm/s | 2,000 mm/s meets or exceeds |
Fully sealed version of the LB belt module with added dust protection for cleanroom use.
| Published maximum | EMA-100 | LBC Belt-Drive Linear Actuator (cleanr… |
|---|---|---|
| Force | 80,000 N | — |
| Stroke | 2,000 mm | 3,050 mm meets or exceeds |
| Speed | 890 mm/s | 2,000 mm/s meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a roller screw actuator is
A roller screw actuator is a rod actuator driven by a planetary roller screw instead of a ball screw. Threaded rollers sit between the screw and nut, so the load is spread across many line contacts rather than a limited number of balls. This gives much higher load capacity, stiffness and shock resistance in the same envelope, and typically several times the life of a ball screw of similar size. Inverted designs place the rollers on the rod, allowing the motor rotor to drive the nut directly.
When engineers choose a roller screw actuator
Choose a roller screw actuator for high forces, long life, heavy duty cycles or shock loads, such as presses, welding guns, test rigs and hydraulic replacement. The trade-offs are cost, which is higher than an equivalent ball screw, and lower efficiency at very fine leads. For moderate loads and duty, a ball screw is usually more economical. Roller screws also tolerate higher accelerations and speeds at a given diameter, which helps compact high-force designs.
How to specify the Ewellix EMA-100
Send these with your enquiry and an engineer can confirm the right EMA-100 variant or an equivalent:
- Peak and continuous force (N or kN)
- Full motion profile with dwell times
- Required life (km or cycles)
- Stroke (mm) and speed (mm/s)
- Shock or impact loads
- Mounting and side-load conditions
- Lubrication method and environment
Common mistakes to avoid
- Choosing a roller screw when duty and load would let a ball screw do the job
- Neglecting lubrication interval, which strongly affects roller screw life
- Calculating life on peak force instead of the cubic mean load
- Forgetting that motor and drive must also handle the peak force
Ewellix EMA-100: frequently asked questions
Can you help replace Ewellix EMA-100 or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including Motion Control Products options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Ewellix EMA-100?
Modular heavy-duty electromechanical cylinder for hydraulic replacement, with 32/40 mm ball screw (EMA-100-1) or 30 mm roller screw (EMA-100-2-R) versions; series maximum 80 kN dynamic force, up to 890 mm/s and strokes up to 2,000 mm. Published series figures include temperature -20 °C, temperature 50 °C, force 80,000 N, stroke 2,000 mm. It is made by Schaeffler AG; Specify Motion can help source it or propose an equivalent.
Who makes the Ewellix EMA-100?
The Ewellix EMA-100 is made by Ewellix (Schaeffler AG) and is listed here for engineers comparing options. Specify Motion is not affiliated with Schaeffler AG; brand names are used only to identify the product.
What is the temperature of the Ewellix EMA-100?
The published series minimum temperature is -20 °C. Individual models and sizes in the EMA-100 range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Ewellix EMA-100?
We can assess suitable replacement options. On published figures, Motion Control Products LB Belt-Drive Linear Actuator and Motion Control Products LBC Belt-Drive Linear Actuator (cleanroom) are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
Why are roller screws longer lasting than ball screws?
In a planetary roller screw, the load is carried across many line contacts on the threaded rollers, while a ball screw carries load through point contacts on a limited number of balls. Lower contact stress per point gives more load capacity and a longer fatigue life for the same size, typically several times longer at the same load.
When is a ball screw a better choice than a roller screw?
A ball screw is usually better value for moderate loads, normal duty and modest life targets, and it is more widely available in standard sizes and leads. Choose a roller screw when force, shock, stiffness or life requirements push a ball screw beyond a sensible size. Calculating life with the real cycle usually shows which applies.
Further reading: Ball screw vs roller screw · Hydraulic to electric actuator · Linear actuators
Other roller screw actuator series
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