Drilling of round hole in round pipe
Round holes can be drilled with any standard drill. However, it is easiest if you use our step drill, which is specially designed for the combitech® dimensions.
Use the alignment groove as a guide. Thanks to this you can also drill several holes in exact alignment.
... and if, for example, you have to drill right through the middle of a round tube, then mark the holes on both opposite sides and first drill a hole from one side and then the second from the other side. In this way the unsightly burr remains on the inside of the round tube, and the holes are exactly opposite one another.
Drilling of long holes
To drill a long hole, mark the material with a scribing iron or a sharp pencil. Then punch several drill holes right next to each other depending on the required length, drill them out, and file the long hole with a round file to suit the diameter of the holes. To finish, you can file off with a suitable flat file.
Drilling of square holes
To drill a square or rectangular hole, score the material with a scribing iron or a sharp pencil, then punch one or more drill holes right next to each other depending on the required size and drill them out.
You are best using our step drill, which is specially designed for the combitech® dimensions, and afterwards file off the corners with a rectangular file.
General drilling tips
Score the drill hole with a scribing iron or a pointed pencil. It is recommended to punch the drill hole before applying the drill. For drilling aluminium, always use a suitable cutting oil or grease available from specialist retailers. This is to prevent the aluminium from snagging on the blade and stopping the drill from cutting properly. Please also bear in mind that titanium drills are not suitable for working with aluminium.
Wear safety goggles whilst drilling, and if necessary, fasten the components with a screw clamp or in a vise and always work on plastic dry.