Glass tube cracking-off machine, manually operated This 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.
Base Frame: The machine base frame consists of stable aluminum profile struts. All other machine parts, as burner slide and roller drive, are mounted onto this base frame. Range: • Glass tube diameter: 8 - 150 mm • Cutting lengths: 20 - 400 mm Upon request the machine can be delivered in special execution also for larger diameters up to 350 mm and longer cuts up to 800 mm. Cutting Capacity: According to glass tube diameter, wall thickness, glass type and cutting length approx. 300 - 800 pieces/ hour. • Parallel, dry and transparent cuts • Well suitable for cutting series as well as single cuts • Easy operation • Easy and fast adjustment to different tube diameters and individual cuts Glass tube diameter: 8 - 150 mm Cutting lengths: 20 - 400 mm Cutting Capacity: According to glass tube diameter, wall thickness, glass type and cutting length approx. 300 - 800 pieces/hour.