Drill Depth Adjustment; Drill Head; Chuck Assembly; Remove Chuck - HOLZMANN MASCHINEN GBM25 Manual De Instrucciones

15.4 Drill Depth Adjustment

15.5 Drill Head

Perform activities that affect the drill head or chuck, such as installation or expansion
of the chuck or change of the drill head height, only after the machine is switched off
and secured against accidental reactivation.
The machine is equipped with a chuck ejector device.

15.5.1 Chuck Assembly

The chuck is secured by a form-fitting compound against twisting in the drilling spindle.
To install the drill spindle, proceed as follows:
1. Check or clean the conical seat in the drill spindle and at the cone thorn of the tool or chuck.
2. Make sure the safety ring is turned inwards and is attached to the drill spindle.
3. Press the cone thorn into the drill spindle

15.5.2 Remove Chuck

such case use the standard type of drift and when doing so, lower the spindle and quill unit so
that the drift slot is below the spindle housing.
It is essential for efficient use of the built-in drill ejector, that drills and chuck shanks are
provided with standard tapers and tangs. If the tang is too short the drill can only be removed by
using a drift by the aforementioned method. With too long a tang the drill will be removed even if
the pivoting finger stop is in the "IN" position. This can, however, be easily remedied by grinding
down the head of the tang until it clears the ejector.
HOLZMANN MASCHINEN GmbH www.holzmann-maschinen.at
Adjusting the drill depth: To drill multiple holes at the same depth,
use the drill depth adjustment. To do this, loosen the drill depth stop,
adjust the desired depth with the help of the scale, and then fix the drill
depth stop again.
W A R N I N G
To eject the chuck or taper shank drill from the
spindle, the pivoting finger stop is swung outward
away from the spindle by pressing the short
extended section. This allows the quill unit to be
raised an extra ¼". The drill or chuck shank is then
ejected from out of the spindle by giving a light
jerk on the feed lever. The pivoting finger stop in
the „IN"-position. Prevents the quill unit from
returning completely into quill housing, this
preventing the tang on the drill shank from
contacting the drill ejector during normal use.
It sometimes occurs that the drill or chuck shank
may stick in the taper socket, making it difficult to
eject. Do not use force to loosen it as this may
damage both the spindle shaft and the bearings. In
OPERATION
26
GBM25; GMB25T