Break Loose Force and Glide Force Tester - ISO 7886-1 Annex E

SSR-01 Syringe Sliding Resistance Tester

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Break Loose Force and Glide Force Testing

In the medical device and pharmaceutical packaging industries, the reliability and ease of use of hypodermic syringes are critical to safety and user experience. Among the most vital performance metrics is the force required to operate the syringe piston, commonly known as break loose force and glide force. These forces ensure smooth operation during injection or fluid extraction and are essential for both user comfort and patient safety.

No Instrumentos de Célula, we provide advanced solutions such as the SSR-01 Syringe Sliding Resistance Tester, specifically designed to measure these operational forces with high precision. Understanding and accurately testing break loose force and glide force not only ensures quality but also supports compliance with global standards such as Norma ISO 7886-1.

ISO 7886-1 - Break Loose Force and Glide Force Testing

Norma ISO 7886-1, titled Sterile hypodermic syringes for single use – Part 1: Syringes for manual use, provides guidelines to evaluate syringe performance. Anexo E of this standard outlines the ISO 7886-1 testing method for measuring the force required to move the plunger inside a syringe barrel.

This method uses a mechanical testing device to:

  • Registre o força de liberação—the initial force needed to overcome static friction and start plunger movement.
  • Registre o força de deslizamento—the average force required to sustain plunger movement throughout the stroke.

These values are crucial. If the break loose force is too high, it can lead to jerky motion; if the glide force fluctuates, it compromises dosing accuracy and control.

Testing Principle and Procedure
——According to ISO 7886-1 Annex E

The test is conducted using a mechanical testing machine that depresses the syringe plunger at a controlled rate, while continuously recording the force required to operate it. The process involves the following steps:

  • Preparação: The syringe is filled with distilled water at 23 ± 5°C and mounted horizontally. The nozzle is connected to tubing and a reservoir as shown in ISO 7886-1 Annex E’s Figure E.1.
  • Actuation: The machine depresses the plunger at 100 ± 5 mm/min, and data is recorded until 10% of the nominal syringe volume remains.
  • Medição de Força: The system logs:
    • Break loose force (fs) – force needed to initiate movement.
    • Mean glide force (F) – average force during plunger travel.
    • Maximum glide force (Fmax) – highest force recorded during travel.

This method ensures precise, repeatable testing, simulating real-world usage conditions.

SSR-01 Syringe Sliding Resistance Tester

To meet the high demands of syringe testing and regulatory compliance, Instrumentos de Célula developed the SSR-01 Syringe Sliding Resistance Tester. It complies fully with ISO 7886-1 Annex E, offering an optimized platform for reliable force measurement.

Key Features Include:

  • Alta precisão: Force accuracy up to 0.5% of full-scale reading.
  • Wide Test Speed Range: Adjustable from 1 to 500 mm/min to accommodate various test conditions.
  • Three-Force Measurement: Automatically captures break loose force, mean glide force, and maximum force.
  • Interface amigável ao usuário: PLC-controlled with a 7-inch HMI touchscreen for seamless operation.
  • Built-in Printer: Provides immediate test results for documentation and quality assurance.
  • Overload Protection: Ensures long-term durability and operator safety.

Parâmetro principal

Célula de carga200N (ou conforme necessário)
Teste de velocidade1~500 mm/minuto
Precisão0,01 mm
Poder110~220V

Applications and Industry Impact

Break loose force and glide force testing is critical across multiple sectors:

  • Dispositivos médicos: Ensures syringe safety and usability for healthcare professionals and patients.
  • Produtos farmacêuticos: Verifies product consistency before distribution.
  • Regulatory Testing: Provides data necessary for compliance with Norma ISO 7886-1 testing requirements.
  • Controle de qualidade: Helps manufacturers maintain high production standards and reduce defect rates.

Thanks to its precision and adherence to ISO protocols, the SSR-01 is ideal for syringe manufacturers, pharmaceutical companies, e quality inspection agencies.

Por que escolher a Cell Instruments?

With decades of experience in medical packaging testing e automated measurement systems, Instrumentos celulares Co., Ltd. is a trusted partner in quality assurance. Whether you need standard testing instruments or customized solutions for specialized applications, our team delivers robust, innovative tools like the SSR-01 to meet and exceed global compliance expectations.

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