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Electric hand tools


Enterprises must ensure that electric hand tools are inspected regularly according to the instructions of the manufacturer.

  • In general, electric hand tools (class I) must be inspected at least every two months.
  • Double-insulated tools (class II) normally have to be inspected every six months. Most professional hand tools are double-insulated.


Minors under 18 must initially not operate vibrating hand tools and similar with a load in excess of 130 dB(HA) unless this work is taking place in connection with training which aims to give them skills (e.g. as apprentices), and unless they receive the proper instruction.

However, minors are allowed to carry out short-term work with vibrating tools (of less than 30 minutes’ duration over the course of a full working day). There must be usage instructions in Danish which indicate how to set up, operate and maintain the hand tool in connection with work.

Drilling machines

Be prepared for the drill to get stuck.

  • Avoid using the stop button.
  • Do not drill loose materials (materials should be secured in a vice or on a bench).
  • Use extraction if possible. Always use a dust filter unless contamination can be removed effectively.

Slot cutters

Dust which is harmful to health is given off when cutting slots in masonry. Therefore, an extraction unit must be fitted to the slot cutter.

You must wear a dust mask as you work, unless the dust can be removed effectively from your respiration zone.
You must also wear ear defenders.



The following points are applicable to belt grinders, vibrating sanding machines and eccentric grinders:

  • Use extraction if possible.
  • Always wear a dust mask filter unless contamination can be removed effectively.

Polishers often have very high levels of vibration.

Angle grinders

The most serious risk involved with grinding and cutting machines is disc rupture as splinters can pass through the body of a human.

Disc rupture is caused by:

  • the disc being tensioned incorrectly. Use correct tensioning flanges, shims and tensioning.
  • the rotation speed being higher than the speed for which the disc is approved.
  • the disc being used incorrectly, the disc being fitted crooked and/or at too great a pressure, for example.
  • poor adjustment.
  • careless working, with knocks and blows.


Safety rules when using an angle grinder:

  • Pull the plug out of the socket when replacing the disc.
  • Use a disc which fits the machine and which has the relevant speed rating.
  • Tension the disc using the correct tensioning flanges.
  • Check whether the disc rotates without wobbling – before you use it.
  • The prescribed screen must be fitted.
  • Do not press hard on the disc.
  • Do not subject the disc to pressure from an angle or any other pressure which may break it.
  • Do not use cutting discs for grinding, or grinding discs for cutting.
  • Compressed air-driven angle grinders must be made safe to prevent too high a speed caused by them being connected to too high a pressure.
  • Always wear ear defenders.
  • Always wear eye protection, goggles with side guards or close-fitting goggles.
  • When handheld grinding machines give off dust in sufficient quantities to harm health, they must have extraction.
  • Remove loosely hanging scarves and similar.
  • Position the machine carefully so that the disc is not knocked.
  • Position the machine so that the disc does not get wet.
  • In wet rooms, and in areas where the earth connection is particularly good, you should only use low-voltage machines (via a transformer).

Bayonet saws

When using bayonet saws, there is always a risk of cuts so pay particular attention when starting and ending tasks.

  • Always wear ear defenders.
  • Always wear eye protection, goggles with side guards or close-fitting goggles.
  • When replacing blades, pull the plug out of the socket.

Handheld circular saws

Handheld circular saws must generally be fitted with cutters. However, some types of circular saw/plunge saw are exempt from this requirement – but the supplier’s usage instructions must state clearly if the cutter can be omitted.

  • A cutter must be made of steel (rigid) of a thickness equivalent to the cutting width (in the case of carbide blades, it must be 0.3 mm smaller than the cutting width).
  • The cutter must be set in the same way as for stationary circular saws.
  • There must be a fixed upper screen which covers the blade entirely at the support point.
  • The lower cover must comprise a moving screen which completely covers the blade under the support point.
  • The lower cover must automatically move back to a safe position when you remove the saw from the material being cut. (You must test this before starting work with the saw and at regular intervals throughout the working day.)
  • When sawing, you must stand to one side of the kerf in case the saw kicks back.


  • During sawing, the material must be secured using clamps or similar if necessary.
  • Wear ear defenders.
  • In the case of dusty tasks, you must use handheld circular saws connected to extractor units or cutting benches with extraction. You must use suitable respiratory protection if the dust concentration has not been reduced sufficiently using an extractor unit.

Minors under 18 must not operate handheld circular saws as the moving and working parts are not shielded during operation.

However, minors under 18 may operate handheld circular saws if this work is taking place in connection with training which aims to give them skills (e.g. as apprentices), but only if they receive the proper instruction.


There is a risk of serious cuts if routers are not used and maintained properly.

  • Remove the plug from the socket when swapping bits.
  • Only use bits which fit the machine.
  • Make sure that bits are fitted correctly prior to use.
  • Keep the machine clean so that all its functions are available.
  • Wear ear defenders.
  • Always wear eye protection, goggles with side guards or close-fitting goggles.