OPTIMUM
M A S C H I N E N - G E R M A N Y
Operation
Version 2.2.2 dated 2014-03-07
Page 46
Original operating instructions
B24H | B24HV | B28H | B28HV
GB
4.9.4 Mounting the drill chuck B24H - B24HV und B28H - B28HV
The quick-action drill chuck
is secured through a form-
fit union (driver) against
twisting in the drilling spin-
dle.
A friction-locking union
holds and centers the
quick-action drill chuck
with the taper mandrel in
the drilling spindle.
Img.4-19:
Taper mandrel
Check and, if necessary, clean the conical seat in the drilling spindle and at the taper man-
drel of the tool or the quick-action drill chuck.
Press the taper mandrel into the drilling spindle.
4.10
Cooling
The friction generated during rotation can cause the edge of the tool to become very hot.
The tool should be cooled during the drilling process. Cooling the tool with a suitable
cooling lubricant ensures better working results and a longer edge life of the tools.
This is best realised by a separate cooling equipment. If there is no cooling equipment included
in the delivery volume, you can cool by means of a spray gun or a washing bottle.
Img.4-20:
Charging hole B28H Vario
Img.4-21:
Coolant shut-off tap and doser B28H Vario
Adjust the flow using the shut-off and dosing tap.
Drill sleeve
driver
Taper mandrel
Coolant charging hole
Coolant shut-off tap and doser
