Planetary Roller Screw RFQ and Selection
A planetary roller screw is a rotary-to-linear transmission in which threaded rollers share load between the screw and nut. This page is an unbranded product-type RFQ entry, not a fixed model, stocked item, or claim of confirmed availability. RobotPiece uses the application, load case, interfaces, environment, documentation, and commercial request to clarify what configuration should be quoted.
A satellite roller screw and a differential roller screw use different kinematic arrangements and cannot be treated as equivalent. When comparing planetary roller screw manufacturers, keep load definitions, life methods, accuracy, preload, lubrication, and inspection scope consistent. A meaningful planetary roller screw price also requires lead, travel, ends, nut, quantity, and documentation.
Planetary Roller Screw Selection Requirements
Begin with the function and operating cycle. Compare screw and nut type, lead, travel, thrust spectrum, speed, acceleration, duty cycle, life objective, axial stiffness, backlash or preload, efficiency, lubrication, contamination, end supports, critical speed, and mounting. Provide normal operation, repeated transients, and credible abnormal events separately. A maximum value without its duration, frequency, boundary conditions, and acceptance method is not sufficient for responsible selection.
Provide screw orientation, usable travel, shaft-end geometry, nut interface, available diameter and length, external guide arrangement, load alignment, side-load avoidance, support bearings, coupling, anti-rotation, stops, temperature, lubrication, and protection.
For a powered axis, define motor speed and torque, drive limits, feedback, brake, force or position control, acceleration, regenerative events, fault stops, cable path, and whether the transmission is supplied separately or inside an actuator.
How to Specify A Planetary Roller Screw
Submit a requirement drawing or marked interface sketch where possible. Separate required values from targets and open questions. Identify the drawing revision, units, coordinate convention, test condition, and which organization owns the surrounding mechanics, controls, installation, and final validation. If alternatives are acceptable, state which interfaces must remain unchanged and which design variables may be reviewed.
Engineering Reference
The following primary-source engineering material is useful for understanding the component principle and the kinds of parameters that need definition. It is background only; it does not establish the specification, availability, compatibility, or performance of a proposed RobotPiece configuration. Review the engineering reference.
Quotation Scope to Confirm
Possible scope items include: screw; nut; rollers; shaft-end machining; support bearings; coupling; lubrication; wipers or cover; housing; guide; motor and verification documents. None is assumed to be included. The quotation should list every supplied item, quantity, interface, accessory, drawing, document, test, and packaging requirement. It should also identify customer-supplied items and the information still required before a firm configuration can be accepted.
Current specifications are confirmed per requirement. RobotPiece does not infer ratings, fit, life, accuracy, compatibility, or included items from a generic name or product-type image. Final construction, dimensions, connectors, finish, and appearance depend on the approved configuration and supply boundary.
Inquiry Checklist
- Screw and nut type
- Lead
- Travel
- Thrust spectrum
- Speed
- Acceleration
- Duty cycle
- Life objective
- Axial stiffness
- Backlash or preload
- Efficiency
- Lubrication
- Contamination
- End supports
- Critical speed
- And mounting
- Prototype and expected production quantity, delivery destination, schedule, and required documents
Send drawings and requirements through the RobotPiece quote list or the contact page. Related products are organized in the Actuators category.
Frequently Asked Questions
What is the difference between a satellite roller screw and a differential roller screw?
They describe different roller-screw architectures. The detailed geometry, kinematics, lead, capacity, package, efficiency, preload, lubrication, and manufacturing boundary must be compared from approved drawings.
Can you provide a planetary roller screw price from diameter alone?
No. Price and feasibility depend on travel, lead, nut and roller design, accuracy, preload, shaft ends, materials, lubrication, quantity, inspection, and delivery requirements.
Can RobotPiece confirm a planetary roller screw from an image?
No. An image can help identify the general product family, but selection and quotation require the interface, operating conditions, scope, quantity, destination, and supporting drawings or data. Unknown values should be marked as open rather than guessed.
Image note: the cover is a conceptual product-type illustration, not a photograph of a confirmed model. Actual appearance, dimensions, connectors and supplied items must be confirmed in the quotation.
