Assembly Of The Column On The Lathe - Optimum BF20 L Vario Operating Manual

Operation
4.14

Assembly of the column on the lathe

The mill head with column can be moun-
ted on the lathe bed of the D240 and
D280. An adapter is required to fix it. It is
not possible to fix it on the lathe saddle.
The adapter is dimensioned in a way that
the center of the lathe chuck can be
reached with the centre of the milling
spindle (line tailstock - lathe chuck).
"Optional accessory" on page 24
Due to the manufacturing tolerances of
cast parts and the manufacturing toleran-
ces of two different machines, it is
however not possible to exactly reach the
centre. The adapter might be too short or
too long.
If required, the adapter has to be milled or
provided with dummy sheets. When using
dummy sheets, the complete surface
needs to be filled.
When aligning the column with the mill head mounted onto it, we recommend to disassemble
the mill head from the column in order to reduce the holding force of the column. Unscrew the
stud screw (screw) position 266. Disassemble the mill head from the column by completely loo-
sening the clamping screw and the guide screw and pull off the mill head.
Check the alignment (right angle horizontal and vertical) of the column regarding the reference
level at the lathe bed.
INFORMATION
In order to avoid the efforts of alignment when retrofitting it at a later time, we recommend you to
provide the column and the adapter as well as the adapter and the lathe bed with aligning pins.
If required, also pin the column to the cross table before disassembling the column. It is most
suitable to use hardened straight pins of 8mm or 10mm according to DIN 6325 and an adjust-
ment tolerance field m6 (e.g. DIN 6325-8 m6 x 30). These straight pins have a round cap on
one side which simplifies to stick the parts together. The holes have to be predrilled imperatively
about 0,2mm smaller in the assembled status and have to be grinded with a reamer also in the
assembled status. Therefore, make sure to use a new spiral drill with a diameter of 7.8mm for
the straight pins of 8mm.
9 / 03 / 2010 Version 3.1.4 BF 20 Vario ; BF 20 L Vario
OPTIMUM
M A S C H I N E N - G E R M A N Y
Column
Adapter 3356572
Column
Fig.4-15: Adapter
Drilling-Milling machine Page 37