Arnold Precision Crack-Off Machine

Glass tube cracking-off machine, manually operated The universal model with reliable cracking-off system - suitable for soda glass, lead glass and borosilicate glass. The tube to be cut is manually placed on the roller drive of the machine and pushed against the adjustable limit stop. Now the turning tube is manually scratched outside by means of a diamond. Thereupon the cracking-off burner, mounted on a slide, is placed against an also adjustable limit stop exactly on the scratching position and then inserted into the tube. By means of the very sharp hydrogen/oxygen flame and the cleft made by the diamond at this position, the tube cracks off. Alternatively the tube can be heated up from outside by a very sharp flame and cracked-off through a cooling roller, running in a water bath. This method is only suitable for soft glass.