
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 35
Original operating instructions
DH26GTV | DH28GSV | DH32GSV
GB
If required, adjust the desired drilling depth by means of the drilling depth stop in order to obtain
a uniform drilling depth.
Please make sure to use a suitable dust suction when treating wood since wood dust may be
health hazardous. Wear a suitable dust mask when performing works at which dust is gener-
ated.
4.3
During work
The spindle sleeve feed is done via the star grip. Make sure that the feed is constant and not
too fast.
The spindle sleeve is returned to its initial position by the return spring.
WARNING!
Seizing of clothes and / or hair.
Make sure to wear well-fitting work during drilling work.
Do not use gloves.
If necessary, use a hairnet.
CAUTION!
Danger of bumps from the levers on the star grip.
Do not release the star grip when repositioning the drilling spindle sleeve.
Pull back the drilling spindle sleeve by hand.
CAUTION!
Danger of crushing. Do not place your hand between the drilling head and the
spindlesleeve.
INFORMATION
The smaller the bit the more easily it may break.
In the case of deep drilling, remove the bit from time to time to remove filings from the drill. Add
a few drops of oil to reduce friction and prolong the service life of the bit.
4.4
Cooling
CAUTION!
Danger of injury due to brushes getting caught or pulled in. Use a spray gun or a
squeeze bottle for cooling, or the coolant system of the machine.
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. Use a spray
gun or a squeeze bottle for cooling the tool.
INFORMATION
Use a water-soluble and non-pollutant emulsion as a cooling agent.This can be acquired from
authorised distributors.
Make sure that the cooling agent is being collected.
Respect the environment when disposing of lubricants and coolants.
Follow the manufacturer’s disposal instructions.