Tubing cutting glass

Basic Glassworking Working with Glass Tubing Cutting glass tubing... 

Figure 13. Cutting through a glass tube with a high speed wheel...

Drawing a tube off to a spindle is the simplest of the basic glassworking operations. It is a convenient alternative to cutting glass tubing when short lengths are required and it is the preliminary stage to many other operations. 

The side arm is made from tubing of about 0-5 cm diameter by drawing a spindle and making a ridge just above the shoulder. The glass is cut off 1-2 cm from this ridge (Figure 53, IT). 

When making a seal the tungsten rod is first beaded as with Pyrex. The bead of the special glass may either be fused directly into Pyrex (Figure 38,1) or first fused into a tube of the same glass and this tube cut near to the seal and fused to a Pyrex tube (Figure 38, It). 

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