Operation - Velleman VTHD21B Bedienungsanleitung

• Protect this device against rain and moisture
• Do not wear baggy clothes as the device's moving parts may get caught in them.
• Do not use the device in a dusty environment and near flammable liquids or substances
• Keep this device out of reach of children.
• The ON/OFF switch must be off when you plug in the device.
• Never use the device without safety goggles
• Store the device in a cool environment.
• Check the device for damage prior to use and replace damaged parts if necessary.
• Always disconnect the device from the mains when it is not in use or when you wish to clean
it. Only handle the power cord by the plug. Never pull out the plug by tugging the power cord.
• Do not crimp the power cord and protect it against damage from sharp edges. Ask an
authorised dealer to replace the cord if necessary.
• All accessories should be tested for at least the speed indicated on the tool label.
Accessories that exceed their rated speed can fly apart and inflict injuries.

5. Operation

Preparation
Unplug the device before changing the bit and do not press the lock button while the device is
running.
Turn the drill chuck slightly and press the lock button until it engages. Open the clamping jaws
and change the bit. Make sure you insert the bit as far as it will go. Protruding drill bits will
deform easily and cause the device to vibrate.
Important remark : Always wear protective goggles and never use damaged or bent shafts or
grinding wheels.
Power Supply
Only use the supplied AC adapter. The adapter automatically deactivates in case of overload.
Disconnect the adapter from the mains and let it cool for a few minutes.
Use
Do not use damaged grinding wheels or shafts.
Put the ON/OFF switch (3 in fig. on p. 1) in the ON position and set the desired speed with the
speed control (2 in fig.).
The best results are not achieved by applying a lot of pressure on the device, but by using the
device at a constant speed.
Small accessories = high rpm's
Large accessories = low rpm's
Hold the device like a pen when drilling or engraving. Hold the device like a hammer for rougher
applications.
Remark : Do not cover the ventilation slots during use.
VTHD21B 2 VELLEMAN