Breakaway Force/Glide Force of Syringes, Carpules and Similar Drug-Delivery Systems

Test fixture to determine the breakaway force and glide force of syringes

Objective of Determining the Breakaway Force and Glide Force on Syringes

The test fixture is used to determine the breakaway force and glide force of syringes, syringe cartridges, and similar drug-delivery systems. The glide force test is based on the standards DIN EN ISO 7886 -1, DIN EN ISO 11499 and ISO 11040-4. The breakaway force and glide force are important parameters used in the selection of suitable syringes. These forces may not exceed or fall below certain limits to ensure that a safe drug dose is administered. The forces are influenced by the viscosity of the drug and the size of the cannula.

With its adjustable specimen holder, the ZwickRoell universal test fixture can accommodate all common syringe geometries. Specimen diameter adjustment is performed steplessly and tool-free via a handwheel. Optional holders facilitate the testing of specimens without finger grips. In conjunction with the testXpert III testing software, the maximum force and averaged glide force can be easily determined. The integration of a weigh module makes it possible to determine the dosing accuracy of single doses, such as those in insulin cartridges. A camera documents the glide force of the syringe plug. The videoCapture plus option for testXpert III synchronously records the test results and the video signal. Together with the non-contact videoXtens extensometer, continuous measurement of the thickness of the plug is also possible.

Test fixture to determine the breakaway force and glide force of syringes
Fixture to determine the glide force/breakaway force of syringes with integrated scale

Benefits/features of the test device for determination of the breakaway force:

  • Test device consists of a holder at the bottom and a die at the top.
  • Includes a glass container to collect escaping fluids.
  • Swiveling guide jaws with two different radii ensure optimal guiding.
  • Die with concave seat ensures centering of the (syringe) plunger.
  • Customized mounts can be easily attached. Fixture has apertures for visual monitoring of glide path.
  • Insertion and removal of specimens via a quick release fastener maintains the specimen diameter setting.
  • Cartridge holders available as an option for standard sizes 1.5 ml and 3.0 ml.
  • testXpert II makes it possible to connect to an optional scale. This means the fixture can also be used for dosing accuracy tests to, for example, DIN EN ISO 11608-3.
  • A safety door is recommended if testing glass syringes.
  • This fixture can be used to perform tests on dental cartridges for local anesthesia to DIN EN ISO 11499.

Video: Breakaway Force/Glide Force of Syringes 


Determination of the breakaway force and glide force

Determination of the breakaway force and glide force for syringes, carpules, and similar dosing units, zwickiLine, medical industry