A useful starting point for
- Robotic mechanisms with defined acceleration, holding and return phases.
- Compact automation axes where a separate motor, coupling and screw assembly consume too much installation space.
Configuration & OEM engineering
Brushless Roller Screw Servo Actuators
Integrate the brushless motor and roller screw as one axis
Brushless roller screw servo actuators bring a motor, screw transmission and closed-loop drive into a compact assembly. Their suitability depends on the complete operating cycle. A short peak-force event and sustained loaded motion create different motor, bearing and thermal requirements, even when the required stroke is identical.
Request the applicable drawing / CAD revisionThis is a configuration review, not a stocked SKU listing. Ratings, documentation availability, sample scope and lead time are confirmed for the reviewed design.
The first design decision
Can the proposed motor and transmission deliver your loaded motion profile inside the available thermal envelope?
Define these boundaries
- A brushless motor does not imply a particular continuous thrust, duty cycle or lifetime.
- Roller screws require application-specific support, alignment and lubrication review; side loads need a suitable guide path.
Configuration choices and required evidence
Use this matrix to compare candidate configurations. Entries describe decisions to make and evidence to request; they are not unverified product ratings.
| Design input | Options to review | Evidence for the decision |
|---|---|---|
| Motor and winding | Voltage, torque-speed envelope and drive compatibility | Loaded operating points, available bus current and winding temperature limits. |
| Transmission ratio | Screw lead and any intermediate reduction | Output speed, motor speed, reflected inertia and required force over the cycle. |
| Feedback location | Motor encoder and, where required, linear feedback | Homing, absolute reference, commutation and actual output-position acceptance. |
| Heat rejection | Housing conduction and permitted mounting conditions | Ambient temperature, contact surfaces, cycle timing and thermal stabilization test. |
Agree on prototype acceptance before sampling
- 01
Supply a time-based cycle
List extension, dwell, retraction and idle intervals with force and speed for each. Include emergency and occasional peak events separately.
- 02
Review the integrated load path
Check axial bearings, coupling or rotor connection, anti-rotation, guides and end stops. Reserve room for the cable exit and service access.
- 03
Validate heat and output motion together
Request motion traces and temperature measurements on the agreed mounting arrangement. A no-load demonstration does not verify a loaded cycle.
Define the inspection and release package before fixing the sample acceptance criteria.
A practical engineering handoff
Prepare your brushless roller screw servo actuators RFQ
Copy or download this editable text checklist, fill in the operating conditions and send it for review. For confidential drawings, agree on an exchange method and confidentiality terms first. The website form accepts text; it does not upload CAD.
Engineering RFQ — Brushless Roller Screw Servo Actuators Source: https://minilinearactuators.com/products/brushless-roller-screw-servo-actuators To: [email protected] Company / contact: Application and project stage: Supply bus voltage and peak / continuous current: Force-speed-time profile including dwell and peaks: Stroke, installed length and mounting interfaces: Screw lead preference and motor envelope: Encoder, homing and host drive requirements: Ambient temperature, heat path and target production volume: Required drawings / CAD format and revision: Sample quantity / estimated production quantity: Target milestone: Requirements checklist only. Configuration, documentation availability, acceptance criteria and commercial terms require review.
Email the checklist →
Engineering FAQ
Does brushless operation guarantee continuous duty?
No. Continuous operation depends on losses in the complete axis, the load profile and heat rejection. A duty requirement must be tied to a defined ambient temperature, mounting condition and permissible component temperatures.
Can a frameless motor be integrated around the transmission?
It can be evaluated as a custom architecture. Rotor support, bearing arrangement, assembly sequence, encoder space and thermal contact need a joint mechanical and electrical review before feasibility is confirmed.
Should I specify motor torque or output thrust?
Supply the required output force and speed over time, together with your drive constraints. Motor torque is an intermediate sizing result. If an existing motor is mandatory, include its complete torque-speed and electrical data.
Compare related architectures
- Ultra Micro Planetary Roller Screws →
Start a miniature transmission feasibility review with the load path.
- Inverted Roller Screw Actuators →
Evaluate internal roller travel, smooth output and bearing integration.
- Force Control Micro Servo Actuators →
Define measured contact force, sensing and position-to-force transitions.
- Micro Linear Servo Actuators family →
Review your operating point and interfaces
Published and reviewed · Mini Linear Actuators engineering content