Machine construction:
The machine base frame, with the fitted roller rests, is executed in two parts and mounted on a solid aluminium profile tube frame. For transport the base frame can easily be divided.
All other machine parts, like the slide for the cracking-off burner, the basic heating burner as well as the roller drive, are permanently mounted onto the base frame.

Working method cracking off:
The tube which has to be cracked off is laid on the left side of the right roller rest of the machine and then is pushed to an adjustable stop on the right side. After switching on the rotation the tube is scratched from the outside with a diamond.
After that the cracking-off burner, which is mounted on a slide, is driven against an also adjustable stopper precisely to the scratching position and into the tube.

Due to the very sharp, local burner flame and the scratch in this area, created by the diamond, the cracking off operation is started. (Thermal shock method).

Working method tip drawing:
The tube which has to be worked is laid on both roller rests of the machine and is held via a spring weighed pressure roll on the left roller rest. To the right of the heating burner the tube length, which is to be pulled off from the starting tube later, is positioned.
The rotation drive is switched on, and via the foot operated gas oxygen economizer the burner is started.
After reaching the desired tube temperature the burner is switched off, the short tube end is taken by hand and is stretched by turning and pulling at the same time to a tip.

After solidifying the tube is drawn under the pressure roll to the length of the tip and the operation is repeated. During the heating period the operator can cut off the resulting tips with a glass cutting knife. For pulling tips which have the same length the stopper, which can be driven over the whole machine length, can be used as positioning assistance. For heating different lengths of tube zones the heating burner head can be changed or swivelled around by 90°. The standard burner is a three-row box burner with a flame length of 35 mm.

Working method glazing:
For glazing the same heating burner is used as for tip drawing. Two tube ends can be glazed at the same time.
Therefore one tube is laid on the left roller rest and one tube is laid on the right roller rest and the burner head is turned about 90° so that the flame stands parallel to the cutting edge. Now by switching on the tube rotation and the burner the glazing procedure can begin. Melting time and burner adjustments depend on diameter / wall thickness, the kind of glass and the desired melting grade.

Operative range cracking off:
Glass tube diameter: from 20 - 150 mm
Cutting lengths:  from 20 - 750 mm

Operative range tip drawing:
Glass tube diameter: from 20 - 60 mm
Tip lengths:  independent on the machine

Operative range glazing:
Glass tube diameter: from 20 - 150 mm

Cutting performance:
Depends on glasstube diameter, wall thickness, kind of glass and cutting length approx. 300 - 800 pcs/h.

Tip drawing performance:
Depends on glass tube diameter, wall thickness, kind of glass and tip length approx. 50 - 300 pcs/h

Glazing performance:
Depends on glass tube diameter, wall thickness, kind of glass and used burner

Drive:
Motor for connection to single-phase a.c. 230 Volt, 50 cycles. (Special voltages can be taken into account) Capacity:  50 W

Standard accessory:
1 piece cracking off diamond
3 pieces cracking off burners for connection to hydrogen and oxygen
(Diameter range 20-50 mm, 50-80 mm and 80-150 mm; cracking off length 750 mm each)
1 piece mixing chamber for connection of the cracking off burner
1 piece box burner with exchangeable burner head for tip drawing and glazing
1 piece pressure roll for retaining the glass tube while tip drawing.
1 piece gas oxygen economizer 152/1 A, for switching the glazing burner on and off
1 set hose connectors for the burners