Custom small glass tubes are widely used in laboratories, medical devices, electronics, and industrial equipment, where precision, consistency, and material performance are critical. Unlike standard glass tubing, custom products require a carefully controlled production process to meet specific dimensional, mechanical, and optical requirements.

The process begins with material selection. Depending on the application, manufacturers may choose borosilicate glass, quartz glass, or tempered glass. Each material offers different advantages in terms of heat resistance, chemical stability, and transparency. Selecting the right raw glass is essential, as it determines the tube’s final performance and suitability for the intended environment.

Next is precision cutting. Glass rods or tubes are cut to the required length using diamond cutting tools or automated cutting machines. During this stage, tight length tolerances are maintained, often within ±0.1 mm, to ensure consistency across batches. Accurate cutting also minimizes material waste and reduces the risk of microcracks.

After cutting, the tubes undergo edge finishing, typically through flame polishing or mechanical grinding. Flame polishing uses controlled high-temperature flames to smooth sharp edges and remove micro-defects, improving both safety and structural strength. For applications requiring higher precision, chamfering or fine polishing may be applied to the tube ends.

The next step is secondary processing, which may include drilling, bending, or shaping. These operations are performed using specialized fixtures and temperature-controlled techniques to prevent stress concentration and deformation. For quartz glass tubes, higher processing temperatures and stricter controls are required due to the material’s high softening point.

Once shaping is complete, annealing plays a crucial role. The tubes are gradually cooled in an annealing furnace to relieve internal stresses generated during cutting and heating. Proper annealing significantly improves durability and reduces the risk of cracking during use.

Finally, each custom glass tube undergoes quality inspection. Dimensional accuracy, wall thickness, surface finish, and transparency are carefully checked. Depending on the application, additional tests such as pressure resistance or thermal shock testing may be conducted.

In summary, the production of custom small glass tubes is a precision-driven process involving material selection, cutting, finishing, secondary加工, annealing, and strict quality control. This systematic approach ensures that each tube meets demanding performance and reliability standards across diverse applications.