4920-BBD6W/B page 10
Braun Maschinenfabrik Gesellschaft m.b.H.
Gmundner Straße 76 - 4840 Vöcklabruck
Tel. +43-7672-72463-0*
www.braun.at
6.) Functional description and taking up operation
6.1 Prepare boreholes for plugs according to core bit diameter and kind of concrete (1, 2
or 3 boreholes) for M 16 and place drilling stand. Fasten with M 16.
Tenacity of the anchoring at least 15 kN !
6.2 Slip the hydraulic base support with assembled hydraulic motor over the plug bolts with nuts
on the sliding carriage (part 11).
The drilling motor is fixed by inserting the 4 slotted washer (part 29) and tightening the nut.
6.3 Fixing of the core bit on the drilling motor
a) Core bit with intermediate flange, for large borehole diameters (up from ø 600 mm),
must be directly flanged to the base support flange.
ATTENTION: If the hydraulic drilling motor is working with a pressure of more
than 160 bar (for ex. RE24) the core bit always must be
"DIRECTLY FLANGED" independent from the diameter.
In case of a higher pressure the max. allowed torque of
the 1 1/4" UNC-spigot could be exceeded and this could lead to
a breakdown.
b) Using a core bit with connection holding fixture 1 1/4" UNC 7 thread winding the thread
flange has to be fixed between base support flange and core bit.
If you fix the core bit in this way make sure that the drive has the right direction of
rotation (to prevent that the core bit becomes loose when taking up operation).
Attention: Make sure that the core bit is firmly fastened to the drilling motor!
6.4 Connect cooling water piping to drilling motor.
The minimum water quantity depends on the borehole diameter and is between 3 and 15
l/min.
Details are shown in the technical brochure of the producers of diamond hollow drillers.
6.5 Only if the drilling stand, drilling drive and core bit are sufficiently fastened,
the drilling drive may be connected to the power supply resp. to the hydraulic
unit !
