PTFE-Coated Cylindrical Stir Bar for Magnetic Stirrers

The PTFE-coated cylindrical stir bar is a stirring accessory for magnetic stirrers, intended for mixing, dissolution and liquid homogenisation processes in the laboratory. It incorporates a magnetic core coated with polytetrafluoroethylene (PTFE or Teflon), a material that provides high chemical resistance and good thermal stability under normal working conditions.

Its cylindrical shape promotes regular rotation inside the vessel and allows efficient transmission of movement to the liquid, contributing to uniform stirring. The outer coating prevents direct contact between the core and the sample, facilitates cleaning and helps maintain the accessory in good condition during use.

Available in several sizes, this range adapts to different working volumes in beakers and Erlenmeyer flasks. The more compact sizes are suitable for small liquid volumes, while the longer versions provide better performance in larger vessels. The coating provides a smooth, stable surface suitable for continuous use, with thermal resistance up to 275 °C.

These stirring elements stand out for their simple design, compatibility with a wide range of laboratory media and suitability for use in chemically demanding environments. The PTFE coating acts as a barrier against multiple substances and contributes to practical maintenance after each use.

The choice of the appropriate size depends mainly on the vessel diameter, the liquid volume and the required stirring intensity. A correctly dimensioned stir bar improves rotational stability and promotes more regular operation, especially in beakers and Erlenmeyer flasks of different capacities.

The PTFE coating gives the component good resistance to numerous chemical agents and thermal stability suitable for multiple laboratory applications. In addition to protecting the magnetic core, it helps reduce surface wear and contributes to extending the service life of the item.

Overall, this range of PTFE-coated cylindrical stir bars provides a practical and reliable solution for achieving uniform stirring in analytical, preparative and control procedures.