Operators Manual - Pentruder Modular Drilling system
18
Drilling with a big drill bit
When drilling with a big drill bit a big and heavy body is in movement, which contains a lot of
energy when rotating. Therefore, it is crucial to assemble the drilling machine following the
instructions given in this operator’s manual.
Important!
Never leave the drill core in the drill bit when taking the drill bit out after drilling a hole
in a wall. The drill core can weigh a lot and make the drill spindle break and the drill column fall
down due to overload of the pivoting head and its couplings. First, remove the drill bit from the drill
spindle, and then remove the drill bit with the drill core from the wall using a crane or other device.
Important!
Inspect the drill bit before drilling is commenced to see if the drill bit runs true or if
segments are missing. Never use a faulty drill bit!
Important!
Never try to stop a rotating drill bit with feet or hands.
Water cooling of the drill bit
The drill bit is cooled by water with first has been used to cool the electric motor and the
hydraulic oil. The water is fed through the power pack and then to the drill unit through the
hoses.
