Torque - to - Failure Tester for Metal Bone - connecting Screws

Torque-to-Failure Tester for Metal Bone-Connecting Screws is a specialized device designed to measure the maximum torque a metal orthopedic screw can withstand before failure. It evaluates the mechanical strength, torsional resistance, and safety of bone screws used in surgical fixation. This tester is widely used in R&D, quality control, and regulatory testing to ensure screws meet performance standards and prevent implant failure during orthopedic procedures.

Standard

(1)YY/T 0662-2008 (Chinese standard for orthopedic implant testing)

(2)ISO 5832-1 (Metallic materials for surgical implants – Wrought stainless steel)

(3)ASTM F543 (Standard specification for metallic medical bone screws)

(4)ISO 6475 (Breaking torque and angle of rotation at failure for metal bone screws)

(5)EN ISO 14708-1 (Active implantable medical devices – General safety requirements)

Product Advantages

(1)Multi-Standard Compliance: Seamlessly aligns with ASTM, ISO, and EN standards, enabling global market access.

(2)High-Precision Torsional Testing: Capable of measuring breaking torque and rotational angles with ±0.1% accuracy, critical for evaluating screw uniformity.

(3)Versatile Testing Modes: Supports torsional-only and axial-torsional combined loading (up to 17.750 in-lb torque capacity) for comprehensive material characterization.

(4)User-Friendly Interface: Intuitive software with real-time data logging, test customization, and automated report generation (PDF/Excel formats).

(5)Durability: Robust construction with corrosion-resistant components, ideal for repetitive high-load testing in medical device labs.

Product Features

(1)Torque Capacity: 62–17.750 in-lb (0.7–2000 Nm), covering small-diameter screws to heavy-duty implants.

(2)Rotational Speed: 0.001°–360°/min, adjustable for static or dynamic failure analysis.

(3)Axial-Torsional Synchronization: Optional biaxial loading for simulating complex surgical insertion forces (per ASTM F543’s full test suite).

(4)Collet-Style Grips: Non-slip, specimen-friendly clamping to prevent premature failure or specimen damage.

(5)Biomechanical Simulation: Compatible with rigid polyurethane foam (ASTM F1839) and natural bone substitutes for self-tapping/driving tests.

(6)Safety Systems: Emergency stop, overload protection, and automatic specimen ejection.

Accessories (Included/Optional)

(1)Standard Kit:

Collet grips (4 mm–8 mm diameter range)

Rigid polyurethane foam blocks (ASTM F1839-compliant)

Calibration certificate (ISO 17025 accredited)

Test control software (multi-language support)

(2)Optional Upgrades:

Axial-torsional load frame (for combined loading tests)

High-temperature chamber (for thermal stability testing)

Automated specimen feeder (high-throughput labs)

Custom collet sets (for miniature or oversized screws)

Technical Parameters

Test Procedures

(1)Secure the bone screw in a calibrated fixture.

(2)Apply gradually increasing torque using the machine until the screw fails.

(3)Record the peak torque and failure mode.

(4)Repeat tests for multiple samples to ensure statistical reliability.

Maintenance Information

(1)Regularly calibrate torque sensors and load cells.

(2)Clean fixtures and grips after each test to prevent residue buildup.

(3)Lubricate moving parts as recommended by the manufacturer.

(4)Inspect electrical connections and software for updates or errors.

This ensures accurate, reliable results and prolongs equipment lifespan.

FAQ

What is the purpose of this tester?

It measures the maximum torque a metal bone-connecting screw can withstand before failure, evaluating mechanical strength and safety.

What types of screws can be tested?

The tester is suitable for orthopedic bone screws of various diameters and materials, including stainless steel and titanium alloys.

How is a test performed?

The screw is fixed in a fixture, torque is applied gradually, and the peak torque at failure is recorded automatically.

Can it record data automatically?

Yes, the tester logs torque values, failure modes, and generates test reports for analysis.

How often should the device be maintained?

Routine maintenance includes calibration, cleaning fixtures, lubricating moving parts, and checking software and electrical connections.