OPTIMUM
M A S C H I N E N - G E R M A N Y
Operation
Version 1.2.5 dated 2017-03-10
Page 34
Original operating instructions
DH26GTV | DH28GSV | DH32GSV
GB
4
Operation
4.1
Safety
Commission the machine only under the following conditions:
The machine is in proper working order.
The machine is used as prescribed.
Follow the operating instructions.
All safety devices are installed and activated.
All failures should be eliminated immediately. Stop the machine immediately in the event of any
anomaly in operation and make sure it cannot be started up accidentally or without authoriza-
tion
Notify the person responsible immediately of any modification.
"Safety during operation“ on page 18
A frictionally engaged connection keeps and centres the drill chuck or the drill in the drill spin-
dle.
4.2
Before starting work
Before starting work, select the desired speed. It is depending on the used drilling diameter and
on the material.
"Determining the cutting speed and the speed“ on page 52
INFORMATION
The data of the speed tables are guide values. In some cases it may be advantageous to
increase or decrease these values.
A cooling or lubricating agent should be used when drilling.
For stainless materials (e.g. VA – or NIRO steel sheets) do not centre, as this will result in the
material compacting and the drill bit rapidly becoming blunt.
WARNING!
For drilling jobs, it is necessary to clamp the workpiece firmly to prevent the bit catching
on the pieces. A machine vice or clamping claws is a suitable clamping device.
The workpieces need to be tensed inflexibly and stably (vice, screw clamp).
Img. 4-1: seats for slot nuts
Put a wooden or plastic board beneath the workpiece to avoid drilling through to the work table,
vice, etc.