# Working Advice

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- The magnet retention force of the power tool essentially depends on the thickness of the workpiece. The greatest magnet retention force is achieved using soft steel with a thickness of at least 20 mm.

Note: When drilling into thinner steel, an additional steel plate (of at least 100 x 200 x 20 mm) must be placed under the magnetic base. Ensure that the steel plate cannot fall off.

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- Secure the power tool with a safety strap when working overhead or on non-horizontal surfaces. In the event of a power failure or overload, the magnet retention force is not maintained. The power tool may fall over and cause accidents.

- If the application tool jams, do not apply any more feed; instead, switch off the tool. Investigate the reason for the application tool jamming and eliminate the cause. Do not use the anti-clockwise rotation function.

- Always check all parts of the coolant supply system before beginning work. Never use damaged parts.

- Keep the coolant away from tool parts and people in the working area.

The surface of the workpiece must be smooth and clean. Smooth out coarse irregularities, e.g. welding spatter, and remove loose rust, dirt and grease. The retention force of the magnet only applies for suitable surfaces.

The motor of the power tool can only be started when the magnet is switched on. Before drilling, the magnet strength should be checked.

Magnet strength indicator (21) | Magnet strength
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Green continuous light | Sufficient magnet strength
Red flashing light | Insufficient magnet strength; the power tool must not be used. Causes: Material not thick enough, uneven surface, coated in paint, scale or zinc, unsuitable material (e.g. high-carbon steel)

- Use a drill emulsion or cutting oil for cooling and lubrication in order to prevent the drill bit from overheating or jamming.
  The supplied coolant supply system must only be used when drilling with the annular cutter.
- Workpieces should be centre-punched before being drilled.
- Twist drill: For drilling diameters > 10 mm, pre-drill with a small drilling diameter. This allows you to reduce the contact pressure and puts less strain on the power tool.
- When drilling, only use sharpened annular cutters (brand accessories) that are in perfect condition.
- Choose a suitable speed according to the specifications of the application tool.
  Note: The lowest speed must be used for thread cutting.

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- Switch on the laser (laser on/off switch (7)).
- Align the power tool by referring to the laser cross on the workpiece.
- Switch the magnet on to fix the power tool to the workpiece (magnet on/off switch (20)).
- Secure the power tool with the safety strap (44) when drilling into vertical or sloped surfaces, or working overhead.
- Set an appropriate speed (speed preselection thumbwheel (2)).
- Switch the power tool on (motor on/off switch (9)).
- To drill, turn the crank handle (4) with uniform feed until the required drilling depth is reached.
- Once the required drilling depth has been reached, retract the crank handle until the drive unit has returned to its initial position.
- Switch off the power tool, loosen the safety strap if necessary and switch off the laser and magnet.

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- Only use annular cutters that are free of defects; ensure that these are in perfect condition before each use. Do not use any annular cutters that are damaged.
- Switch the power tool off immediately if the annular cutter gets stuck.
- Protect the annular cutter. The tip of the annular cutter is hard yet fragile.

The following measures will help to slow down the wear and prevent breakage of annular cutters:

- When drilling in steel, ensure that there is enough coolant available; use coolant for metal cutting.
- Make sure that the workpiece is level and clean to guarantee the required magnet strength.
- Before drilling, ensure that all parts are properly attached.
- At the start and end of the drilling procedure, the contact pressure should be reduced by a third.
- If large quantities of metal chips accrue when drilling in materials such as cast iron, copper die casting, etc., compressed air can be used instead of coolant to assist in the removal of metal chips.

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The power tool stops if the rotational direction switch (8) is activated during drilling.
If the rotational direction switch is in the centre position, the application tool can be rotated clockwise while the on/off switch for the motor (9) is continuously pressed.
In this way, the thread-cutting process can be ended smoothly.