Micro Inverted Roller Screw

Miniature inverted roller screw sets for robotic fingers, dexterous hands, surgical mechanisms, and compact precision modules.

Target Buyer:Micro-robotics, dexterous hand, and medical device teams replacing miniature ball screws or custom lead screws.

Capability Highlights

Small-diameter screw and nut packages for finger-scale actuators
Fine lead options for controlled force and short-stroke motion
Prototype support for robotic hand and medical mechanism iteration
Validation focus on torque, noise, cleanliness, and assembly handling

Typical Applications

Dexterous Hands
Surgical Robots
Optics

Engineering Focus

Micro-machining tolerances and thread profile repeatability
Low friction, low noise, and lubricant compatibility
Backlash/preload control at very small pitch and diameter
Packaging review for sensor wires, motor stack, and gripper linkage

Buyer Decision Notes

When this product fits

Choose this family when the application, envelope, and validation needs match: Dexterous Hands, Surgical Robots, Optics.

What to validate first

Start with outer diameter and inspection evidence before comparing quoted price or delivery time.

Best RFQ starting point

Send the first drawing revision, STEP file, or sample photos with target load, lead, stroke, preload, quantity, and delivery country.

Key Evaluation Matrix

Metric	Typical Range	Why It Matters
Outer Diameter	Approx. 4-12 mm custom feasibility range	Crucial for multi-finger packaging where every millimeter changes motor and tendon layout.
Motion Stroke	Short stroke, application-specific	Finger and gripper mechanisms usually need compact stroke with predictable force response.
Validation Evidence	Backlash, torque, roughness, hardness, visual finish	Small screws fail from friction, contamination, and assembly sensitivity before rated load is reached.
Clean Assembly Risk	Handling, lubricant, debris, and corrosion dependent	Micro mechanisms often lose performance from contamination or handling damage rather than load overload.

RFQ Checklist

Maximum OD, total length, stroke, and motor/housing envelope
Pinch force, linear speed, precision, and backlash/preload target
Material, coating, corrosion, clean assembly, or lubrication needs
Prototype quantity, validation fixture plan, and target delivery date

Risk Controls

Small geometry distortion after heat treatment: Confirm material, hardening route, and final grinding sequence before sample machining.
Friction or lubricant instability in finger-scale packages: Validate torque, noise, and lubricant plan under the buyer-side duty cycle.
Assembly damage during tiny component handling: Define packaging, handling fixtures, visual criteria, and incoming inspection steps before shipment.

Product Gallery

Buyer FAQ

What is the smallest diameter you can produce?

Feasibility is reviewed by OD, lead, stroke, load, material, and inspection method. Very small custom projects can be discussed around the 4-12 mm feasibility window, but final limits depend on the drawing.

Are these micro screws back-drivable?

Back-drivability depends on lead angle, preload, friction, lubricant, and motor/control strategy. We review it as a design trade-off against holding force and package size.

What materials are used for medical applications?

For medical or clean mechanisms, buyers should specify stainless alloy preference, corrosion requirement, coating limits, lubricant restrictions, cleaning method, and any compliance flow-downs.

How do you control backlash at such a small scale?

Backlash is controlled through matched component geometry, preload strategy, careful assembly, and measured sample records. The practical target should be agreed before machining.

Related Resources

Send drawings to [email protected] or WhatsApp +86 18857971991 for a manufacturing review.

Inquiry Email

[email protected]

Email app

Include target OD, lead, stroke, load, quantity, and delivery country.

WhatsApp Engineering

+8618857971991

Chat on WhatsApp

Best for quick RFQ clarification and drawing-review coordination.