Buy Roller Screw Actuator: Selection & RFQ Guide
Create an RFQ starter from the application inputs you know, then compare drive options and ask suppliers for model-specific sizing.
Request RFQ & SizingPublished · Last reviewed · Publisher: Roller Screw Actuators
Actuator RFQ starter
RFQ starter
50 kN · 250 mm/s · 50% duty
These are example inputs, not a fit decision or actuator size. Replace them with application data before sharing.
Request RFQ & SizingApplication Parameters
Starting values are examples, not measured results or a recommendation. Replace them with your application data.
Also provide peak force, its duration, and the full force profile; this input alone cannot determine capacity or life.
Ask the supplier to verify critical speed and thermal limits for the selected screw geometry and support arrangement.
Include cycle time, travel in each direction, dwell, and the required service life in the RFQ.
Confirm sealing, corrosion protection, and lubricant compatibility for the actual exposure and cleaning method.
Copy-ready RFQ Starter
Your current inputs
50 kN · 250 mm/s · 50% duty
Clean / standard factory
Quote Cost Drivers
Stroke, load profile, life target, accuracy, motor, and environment determine the quote. This screen does not estimate a price.
Lead Time
Confirm current availability and delivery date with the supplier for the quoted configuration.
What the supplier still needs
- Peak load, duration, and a force/speed profile
- Stroke, target life, and accuracy/repeatability
- Mounting envelope and motor/drive/brake requirements
- Quantity, delivery region, and full environment details
This tool formats four inputs for an RFQ. It does not compare technologies, size a model, verify life, or approve a safety rating. Request model-specific calculations from the supplier.
Roller screw actuator RFQ starter Replace the example defaults with application data before sending. Continuous force input: 50 kN Maximum speed input: 250 mm/s Duty cycle input: 50% Environment: Clean / standard factory Still needed for model-specific sizing: peak force and duration; force/speed profile; stroke; target life; accuracy and backlash; mounting and envelope; motor/drive/brake details; quantity and delivery region.
Procurement Guide: Key Decisions
Compare technologies against the same force profile, motion cycle, life target, and installed system. No single load or duty number determines the right actuator.
Calculate life for the selected model
Roller screws have multiple load-carrying roller contacts, but fatigue life depends on the selected screw’s dynamic rating and your equivalent load. Do not assume a fixed life advantage over a ball screw.
Compare system energy
Avoid generic efficiency percentages. Compare measured or manufacturer-calculated input power for the actual load cycle, including motor, drive, pump unit, idle periods, and cooling.
Confirm price and delivery
Price and lead time vary by model, stroke, options, quantity, and current supplier capacity. Ask for a dated quote and a confirmed delivery schedule for the exact configuration.
When to Buy a Roller Screw Actuator
- Replacing a hydraulic axisCompare force over the complete stroke, motion profile, holding behavior, controls, and installed-system needs. A screw actuator is a candidate only when a specific model meets the calculated load and life requirements.
- Pressing and shock loadsAsk suppliers to check static safety factor and the actual load distribution, especially for short-stroke presses. Do not size from nominal continuous force alone.
- Frequent or continuous operationCheck fatigue life, heat, lubrication, and motor/drive sizing using the actual cycle. A high duty percentage by itself does not establish suitability.
When NOT to Buy
- Low-load, simple motionCompare a ball screw, pneumatic cylinder, or belt drive when their accuracy, force, life, and control behavior meet the application. A roller screw may add cost and capacity you do not need.
- Purchase price is the dominant constraintObtain comparable quotes for roller and ball screws, then compare installation, expected service life, lubrication, replacement effort, and downtime using your own operating assumptions.
- Speed or stroke is near a product limitConfirm the selected screw’s critical speed, thermal limits, lubrication, and support arrangement. These limits depend on geometry and mounting, so a single speed cutoff is not reliable.
Scroll horizontally on small screens to compare all columns.
| Decision factor | Ball screw | Roller screw | Hydraulic cylinder |
|---|---|---|---|
| Load and life | Size against equivalent load, dynamic rating, and required life. | Use the selected model’s rating and load-life calculation; do not apply a universal life multiplier. | Verify force at operating pressure, stroke, and duty profile. |
| Energy and ownership cost | Compare input power over the real motion cycle and idle time. | Compare the full motor, drive, controls, lubrication, and cooling needs. | Include the pump unit, plumbing, fluid service, and idle power where applicable. |
| Integration | Check end supports, alignment, motor, and screw critical speed. | Check the same items plus the exact screw series and nut configuration. | Check cylinder mounting, pressure supply, valves, and hose routing. |
| Price and delivery | All options vary by size, stroke, options, quantity, and supplier capacity. Obtain current written quotes for comparable configurations. | ||
This is a comparison framework, not a price or performance ranking. Manufacturer ratings apply only to their stated product series and test conditions.
Technical references checked 7 October 2026. The cited catalogs describe specific product series; they do not establish a universal roller-screw limit or market-wide price, efficiency, or delivery benchmark. Compare selection assumptions in the Schaeffler ball and roller screw selector and read a manufacturer-specific Thomson’s high-load ball screw comparison.
What a supplier quote should confirm
Compare complete, dated offers against the same duty profile. Ask each supplier to identify the exact configuration and state the assumptions behind its sizing and delivery commitment.
Configuration and fit
Model and screw type, stroke, mounting, envelope, motor/drive, brake, encoder, and included accessories.
Sizing evidence
Static and dynamic ratings, life assumptions, peak-load checks, critical speed, and thermal limits for your cycle.
Validation and service
Lubrication interval, inspection records, acceptance tests, warranty scope, and replacement or maintenance plan.
Commercial terms
Quantity, unit and tooling costs, quote validity, lead time, delivery destination, and Incoterms.
For the full input worksheet, see the roller screw actuator RFQ guide. Compare screw architectures in the ball screw vs. roller screw selection guide, and review inspection records buyers can request before sample approval. The supplier should perform the final model-specific engineering review.
Request a model-specific quoteFrequently Asked Procurement Questions
Procurement answers to help engineering and sourcing teams request comparable, model-specific quotes.
How much does a roller screw actuator cost?
There is no reliable universal price from the inputs on this page. Request a quote with force profile, stroke, speed, accuracy, life target, motor, mounting, quantity, and environment. Compare the same scope across screw and hydraulic alternatives, including integration and controls.
What is the expected maintenance schedule?
Follow the manual for the exact actuator and lubricant. The interval depends on speed, load, stroke, contamination, and operating temperature; this page cannot specify one safe interval for all models. Include lubrication access and inspection in the RFQ.
Can I buy just the roller screw mechanism?
Yes. If you buy a bare screw, your team must specify and verify the supports, bearings, alignment, lubrication, and drive integration. Confirm warranty scope and installation requirements with the supplier before ordering.
How do I specify the motor mount?
Include the motor make and model, shaft and flange dimensions, torque/speed requirements, brake, encoder, and cable direction. Ask the supplier to confirm the adapter, alignment, and acceleration limits for the selected assembly.
What should I include in an RFQ?
Send continuous and peak loads, stroke, speed and acceleration profile, duty cycle, required life, accuracy, mounting space, environment, motor details, quantity, and delivery destination. Ask for the assumptions and model-specific sizing results with the quote.
What confirms that a screw is correctly sized?
Ask for the selected model’s static and dynamic ratings, life calculation, critical-speed check, thermal assumptions, lubrication plan, and mounting limits. Compare those results with your complete motion profile and safety requirements.
Inquiry Email
Include force, stroke, speed, duty cycle, life target, quantity, and delivery country.
Send actuator specs to [email protected] or WhatsApp WhatsApp Engineering Support for an engineering review.