Version 1.1.4 dated 2015-3-30
Page 43
Original operating instructions
BF46 Vario | BF46TC
US
4.18
Manual spindle sleeve feed with the spindle sleeve lever
ATTENTION!
The clutch of the fine feed has to be disengaged before the spindle sleeve lever can be
used. Activating the spindle sleeve lever when the fine feed is engaged may damage the
clutch.
Loosen the handle screw. The sleeve lever moves away from the drilling head and deacti-
vates the coupler of the fine feed.
4.19
Swivelling the drill-mill head
The drill-mill head may be swivelled 45°
to the right and to the left. There are to
loosen three screws.
Img.4-15:
Clamping screws
CAUTION!
If the screws are completely unfastened, the drilling-milling head might fall down. When
slewing the working head, only unfasten the screws as far as necessary to be able to
perform the settings. After having set the slewing angle, retighten the fixing screws.
ATTENTION!
The drill-mill head can be rotated much further. When slewing it further on gear oil might
escape.
4.20
Selecting the speed
For milling operations, the essential factor is the selection of the correct speed. The speed
determines the cutting speed of the cutting edges which cut the material. By selecting the cor-
rect cutting speed, the service life of the tool is increased and the working result is optimised.
The
company
cutting speed mainly depends on the material and on the material of the tool. With
tools (milling cutters) made of hard metal or ceramic insert it is possible to work at higher
speeds than with tools made of high-alloyed high-speed steel (HSS). You will achieve the cor-
rect cutting speed by selecting the correct speed.
In order to determine the correct cutting speed for your tool and for the material to be cut, you
may refer to the following standard values or a table reference book (e.g. Machinery's
Handbook ISBN 0-8311-2424-5, Insert Pgs. 30a & 30b (attached)).
The required speed is calculated as follows:
Clamping screws
