Compact Roller Screw Actuator

Name: Compact Roller Screw Actuator
Brand: Roller Screw Actuators
SKU: compact-roller-screw-actuator
Availability: InStock
Rating: 4.9 (24 reviews)

Space-saving linear motion solutions designed for robotics and tight-envelope applications where force density must be reviewed early.

Target Buyer:Robotics Engineers and Medical Device Designers working with strict space constraints.

Best Fit

Robotics, humanoid joints, mobile automation, medical devices, and fixtures with strict length or mass limits.
Projects that need high force in a short retracted envelope using inverted or tightly integrated architectures.
Battery-powered systems where actuator efficiency, thermal path, and weight drive the machine-level design.

Review Before Sizing

Maximum envelope, retracted length, moving mass, cable route, connector position, and thermal boundary.
Peak acceleration, shock load, backdrive behavior, braking strategy, and controller current limits.
Noise, sealing drag, lubrication retention, and serviceability in a compact housing.

Capability Highlights

Inverted roller screw designs for minimal retracted length
High power-to-weight ratio
Integrated frameless motors (optional)

Typical Applications

Humanoid robots
AGVs/AMRs
Medical devices

Engineering Focus

Minimizing dead length in the actuator housing
Lightweight material selection (aluminum, titanium)
Custom hollow-shaft integration

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Power Density	High force per kg when packaging is optimized	Critical for mobile robotics to extend battery life and payload capacity.
Retracted Length Ratio	Driven by inverted layout, stroke, and bearing stack	Determines whether the actuator can fit humanoid joints, compact fixtures, or mobile machinery.
No-Load Current / Friction Torque	Measured during prototype validation	Small actuators lose useful battery life when seals, preload, or misalignment add drag.
Thermal Rise	Checked at buyer duty cycle and ambient condition	Compact packages have less heat rejection area and can derate faster than larger cylinders.

RFQ Checklist

Maximum allowable retracted length and weight
Required stroke
Target voltage and current limits (battery powered)
Cable route, connector position, thermal boundary, and service access
Backdrive behavior, brake strategy, noise target, and pilot quantity

Risk Controls

Overheating in compact spaces: Optimized duty cycle calculations and thermally conductive housings.
Late cable or sensor conflict in a tight envelope: Review STEP files with connector, cable bend radius, sensor position, and service clearance included.
Backdrive behavior conflicts with robot safety goals: Specify brake, friction, gear ratio, controller limits, and mechanical stops during the concept stage.

Factory Validation Evidence

Envelope stack-up review, thin-wall housing machining checks, and bearing alignment inspection.
Friction torque, no-load current, backlash, axial play, and temperature-rise measurements for compact packages.
Optional prototype build review against STEP files before pilot batch release.

Buying Notes

Provide 3D envelope files early; compact actuators usually fail late when cable, sensor, and mounting details are omitted.
State whether low friction or high holding force is more important, because brake and seal choices change the design.
Use prototype and pilot stages to verify thermal behavior before committing to a high-volume robot module.

Product Gallery

Compact Roller Screw Actuator Shaft Detail

Buyer FAQ

Do you offer custom designs for humanoid robotics?

Yes, we work directly with robotics OEMs to design inverted roller screws and custom integrated actuators that fit exact joint envelopes.

What makes compact actuator sizing different from standard cylinders?

Weight, retracted length, cable routing, connector position, thermal path, noise, and service access become primary constraints alongside force and stroke.

Can compact roller screw actuators be supplied for pilot batches?

Yes. Pilot builds should include CTQ dimensions, no-load current, backlash, axial play, thermal rise, and repeatability checks before larger robot module orders.

Related Resources

Inquiry Email

[email protected]

Email app

Include force, stroke, speed, duty cycle, life target, quantity, and delivery country.

Instant Chat

+86 18857971991

Chat on WhatsApp

Use WhatsApp for faster engineering intake.

Send actuator specs to [email protected] or WhatsApp +86 18857971991 for an engineering review.

Best Fit

Robotics, humanoid joints, mobile automation, medical devices, and fixtures with strict length or mass limits.

Projects that need high force in a short retracted envelope using inverted or tightly integrated architectures.

Battery-powered systems where actuator efficiency, thermal path, and weight drive the machine-level design.

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Power Density	High force per kg when packaging is optimized	Critical for mobile robotics to extend battery life and payload capacity.
Retracted Length Ratio	Driven by inverted layout, stroke, and bearing stack	Determines whether the actuator can fit humanoid joints, compact fixtures, or mobile machinery.
No-Load Current / Friction Torque	Measured during prototype validation	Small actuators lose useful battery life when seals, preload, or misalignment add drag.
Thermal Rise	Checked at buyer duty cycle and ambient condition	Compact packages have less heat rejection area and can derate faster than larger cylinders.

Risk Controls

Overheating in compact spaces: Optimized duty cycle calculations and thermally conductive housings.

Late cable or sensor conflict in a tight envelope: Review STEP files with connector, cable bend radius, sensor position, and service clearance included.

Backdrive behavior conflicts with robot safety goals: Specify brake, friction, gear ratio, controller limits, and mechanical stops during the concept stage.