Façade panels must be provided with undercut drill holes on the back side. These holes must be drilled with KEIL system tools under workshop conditions.
The KEIL system tool consists of the KEIL façade drill bit, the KEIL drill head and the undercut drilling machine (e.g. KEIL portable drilling machine, KEIL drilling table or automated drilling machine with KEIL chuck).
The undercut drilling is carried out in one single step (cylindrical drilling 1 and undercutting 2).
The undercut anchor can only be assembled correctly, if there is a precise undercut drill hole 3. The KEIL depth control guide, which matches the insertion depth of the anchor, will periodically monitor the geometry of the drill hole. The insertion depth hS is set by this depth control guide and all major measurements of the drill hole can be monitored efficiently.