In order to create an angle branch a ‘T’ can be used. However, seeing that Refco is able to drill holes with a vertical collar, a ‘T’ is no longer needed. To this end Refco uses tubes with a diameter between 12 and 108 mm.
The possibilities with regards to the diameter of the hole, the degree of rotation and the length of the workpiece are practically endless. Tube collaring can also be used in order to produce very complex manifolds. For larger series, Refco uses an automatic collaring machine.