Stopper Borer Set, 12 Sizes

Set of 12 Rubber Stopper Borers

This set of stopper borers is designed to perforate rubber stoppers accurately for laboratory assemblies and preparations. The tool includes 12 different sizes, suitable for making holes from 5 to 11 mm, allowing the bore diameter to be matched to glass tubing, thermometers, rods, connectors or other small accessories that need to pass through the stopper with a proper fit. Its compact all-in-one format keeps the different diameters together in a single tool, helping to improve workflow and organisation at the laboratory bench.

Intended Use and Applications

This instrument is used to prepare perforated rubber stoppers cleanly and in a controlled manner, which is common in distillation assemblies, filtration set-ups, gas handling, vacuum work and interconnections between vessels. It is particularly useful when a rubber closure needs to be adapted to insert a straight or bent tube, a probe, a thermometer or any other component that must remain securely held in the stopper without excessive play.

Set Design

The set combines 12 borers of different diameters within a single body, making it easy to select the appropriate size for each application. This format helps to avoid misplacing loose pieces and provides more practical handling during routine laboratory work. As a manual tool, it offers good control during perforation and can be used with rubber stoppers of different sizes and thicknesses, provided that the material is suitable for the selected diameter.

Advantages in Use

Compared with improvised solutions, this type of tool produces cleaner and more regular perforations, reducing the risk of tearing, distortion or uneven cuts in the stopper. A properly made hole improves the fit of the inserted component and contributes to the overall stability of the assembly. In addition, having several sizes in a single instrument makes it easier to choose the most suitable diameter without relying on multiple separate tools.

Recommendations

For a cleaner result, it is advisable to perforate the stopper progressively and with controlled pressure, checking beforehand the external diameter of the part to be inserted. Choosing the correct size is important to achieve a secure fit and preserve the proper function of the assembly. After use, the tool should be cleaned and dried to keep it in good condition.