Inverted Roller Screw
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Medical Robot & Surgical Actuator Roller Screws

Miniature and micro roller screw components for surgical robots, patient-positioning systems, prosthetic limbs, drug delivery pumps, and precision medical linear actuators requiring low noise, low backlash, and clean-assembly compliance.

Target Buyer:Medical device OEMs, surgical robotics startups, and rehabilitation equipment manufacturers requiring precision micro linear motion with regulatory documentation support.
Inverted Roller Screw Product

Solution Highlights

  • Micro diameters from 4 mm OD for catheter-tip, prosthetic, and surgical-instrument actuation
  • Low-noise, low-friction designs for patient-proximate and OR environments
  • Cleanroom-compatible assembly, lubricant selection, and corrosion-resistant materials
  • Biocompatibility-ready material and coating options (stainless steel, passivation, PVD)

Common Use Cases

  • Surgical robot arm and wrist joints
  • Endoscope tip articulation and catheter steering
  • Patient-positioning table and pod actuators
  • Prosthetic limb and exoskeleton linear drives
  • Drug delivery pumps and micro-dosing systems

Implementation Focus

  • Micro diameter feasibility, friction torque, and starting-torque validation
  • Material and lubricant selection for biocompatibility or autoclave sterilization
  • Low-backlash preload for position repeatability in surgical feedback loops
  • Clean-assembly procedures, particulate control, and packaging protocols

Application Decision Notes

Typical module fit

Review this path for Surgical robot arm and wrist joints, Endoscope tip articulation and catheter steering, Patient-positioning table and pod actuators, Prosthetic limb and exoskeleton linear drives, Drug delivery pumps and micro-dosing systems where load density, stroke, and package length drive the screw architecture.

Validation gate

Agree on minimum diameter, backlash/preload, lead accuracy, and load-cycle evidence before sample approval.

RFQ routing

Include the target actuator envelope, application duty cycle, quantity stage, and preferred inspection documents in the first inquiry.

Application Evaluation Matrix

Evaluation MetricTypical RangeBuyer Relevance
Minimum Diameter4–12 mm OD feasibility windowSurgical instruments and prosthetic joints impose extreme envelope constraints that eliminate standard ball screws.
Noise LevelApplication-specific, validated on buyer fixturePatient-proximate devices must meet noise targets during rapid actuation near surgical sites.
Corrosion ResistanceStainless steel, passivation, PVD, DLC coatingExposure to saline, sterilization fluids, or body contact demands material-level corrosion planning.
Position RepeatabilitySub-10 µm achievable with preload controlSurgical precision requires repeatable positioning under varying load and temperature.

RFQ Preparation Checklist

  1. Target OD, stroke, force, speed, and life cycle requirements
  2. Noise and vibration limits for patient-proximate operation
  3. Material restrictions, biocompatibility needs, or sterilization method
  4. Regulatory documentation needs: risk file, material declaration, IQ/OQ/PQ support
  5. Prototype quantity, validation timeline, and cleanroom handling needs

Risk and Mitigation

  • Lubricant outgassing or particle shedding in cleanroom or OR: Select medical-grade lubricant and validate compatibility with sterilization method and cleanroom class.
  • Micro screw fatigue failure during high-cycle prosthetic use: Validate load/life under the actual duty cycle, including shock and overload assumptions.
  • Material non-compliance with biocompatibility or regulatory filing: Confirm material grade, surface treatment, and traceability documentation scope against ISO 10993 or buyer-specific requirements.

Buyer FAQ

Can your micro screws be sterilized by autoclave?

Material and lubricant selections can be reviewed for autoclave, EtO, or gamma sterilization compatibility. Specify the method and cycle parameters during RFQ.

Do you provide material declarations for regulatory filings?

Yes. Material certificates, heat-treatment records, and chemical composition data can be provided to support ISO 13485 or FDA device master record requirements.

What is the smallest roller screw you can manufacture?

We have demonstrated feasibility down to 4 mm OD. Share your target envelope, force, and stroke for a specific manufacturing review.

Can you supply assembled actuator modules for surgical robots?

We supply precision screw/nut/roller sets and can collaborate on actuator-level integration when the motor, sensor, and housing package are defined.

Related Resources

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

Inquiry Email

[email protected]

Email app

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

WhatsApp Engineering

WhatsApp Engineering Support

Chat on WhatsApp

Best for quick RFQ clarification and drawing-review coordination.