Insulated Shaft: Diameter 3-6 mm, Length 150-300 mm

Component Specifications

Definition

A precision-engineered cylindrical component designed for high-frequency electrosurgical electrodes that provides both structural integrity and electrical insulation between the active electrode tip and the surgical instrument handle. It prevents current leakage and ensures patient safety during electrosurgical procedures by maintaining dielectric isolation while withstanding mechanical stresses during surgical manipulation.

Working Principle

The insulated shaft operates by creating a dielectric barrier between the conductive electrode tip and the instrument body, preventing unintended electrical current flow to non-target tissues. It maintains the high-frequency current path exclusively through the active electrode while providing mechanical stability for precise surgical control.

Materials

Medical-grade ceramic (Alumina 99.5% or Zirconia), PEEK (Polyether ether ketone), or PTFE (Polytetrafluoroethylene) with dielectric strength >15 kV/mm, biocompatibility per ISO 10993, and autoclavable properties.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	150-300 mm
Diameter	3-6 mm
Surface Roughness	Ra < 0.8 μm
Dielectric Strength	>15 kV
Insulation Resistance	>1000 MΩ
Operating Temperature	-20°C to 200°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13485, ISO 10993, IEC 60601-2-2

Parent Products

This component is used in the following industrial products

High-Frequency Electrosurgical Electrode

Disposable or reusable conductive tip for precise tissue cutting and coagulation in electrosurgery.

View Product Details

Engineering Analysis

Risks & Mitigation

Dielectric breakdown under high voltage
Mechanical fracture during surgical use
Thermal degradation during sterilization
Surface contamination affecting insulation

FMEA Triads

Trigger: Material impurities or manufacturing defects
Failure: Dielectric breakdown causing current leakage
Mitigation: Implement 100% high-voltage testing and material certification per ISO 13485

Trigger: Excessive mechanical stress during surgery
Failure: Shaft fracture compromising procedure safety
Mitigation: Design with safety factor >3 and conduct mechanical fatigue testing

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm diameter, ±0.1 mm length

Test Method

High-potential testing at 1.5x rated voltage, insulation resistance measurement at 500V DC, mechanical load testing per ISO 10555

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Insulated Shaft

Manufacturer profiles associated with Insulated Shaft.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of an insulated shaft in electrosurgical electrodes?

The insulated shaft provides electrical isolation between the active electrode and the surgical instrument handle, preventing current leakage to non-target tissues and ensuring patient safety during high-frequency electrosurgical procedures.

What materials are commonly used for manufacturing insulated shafts?

Common materials include medical-grade ceramics (Alumina, Zirconia), PEEK, and PTFE, selected for their high dielectric strength, biocompatibility, and resistance to sterilization processes.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Insulated Shaft