Safety instructions for the correct use of cutting and grinding tools


Important note:
Every effort has been made to ensure that all information on this website is correct and up-to-date. However, no responsibility is taken for errors, omissions or consequential damages.



Improper use of coated abrasive products can cause breakage and serious injury.
Observe EN 13743 (Safety requirements for coated abrasive products), ANSI B7.1 (American National Standard on the Use, Care, and Protection of Abrasive Wheels, Machines and Accessories) and all regulations applicable in your country.

Use only the abrasive tools that comply with the safety norms. These products bear the numbers of the applicable EN norm, and the identifier of testing institutes.
• EN12413 for bonded abrasive products.
• EN13263 for abrasives with diamond or boron nitride.
• EN13742 for specific coated abrasives (vulcanized fibre discs, flap wheels, flap discs and spindle-mounted flap wheels).

Never use abrasive tools beyond their expiry date where marked. If no shelf life is indicated, apply the following periods to the following products: Resinoid and Shellac products 3 years, rubber products 5 years, vitrified products 10 years.

Observe warning and safety instructions/symbols on grinding tools and/or their packaging.

Be aware of possible hazards during the use of grinding tools:
• Bodily contact with the grinding tool and breakage in the grinding tool at operating speed.
• Grinding debris, sparks, fumes, dust, noise, and vibration generated by the grinding process.

Observe instructions for the proper use and storage of the grinding tool.

This website contains only the most important safety recommendations.
Further information about the safe use of grinding tools can be obtained in the form of comprehensive safety instructions provided by the FEPA or the Association of German Abrasive Manufacturers:
All employees that are involved in the handling and/or use of abrasive wheels must receive and understand these safety recommendations and the norms and laws mentioned above.
Before use, read the safety instructions provided, including the section on symbol descriptions, further safety data sheets as necessary, and the operating manual for the machine with which the abrasive product is to be used.
Employers should carry out a risk assessment on all individual abrasive processes to determine the appropriate safety measures for each. They should ensure that their employees are suitably trained to carry out their duties.


General safety information

  • Use the appropriate abrasive tool for a given task. A tool that is not sufficiently identifiable should never be used.
  • Ensure that the appropriate clamping flanges are used and that they are in good mechanical condition and free of foreign bodies such as abrasive grains.
  • As necessary and prescribed, use intermediate layers between abrasive bodies and the clamping flange.
  • After mounting an abrasive product, conduct a trial run for at least 30 seconds at operating speed with the correctly mounted guard in place. While doing so, hold the machine so that any pieces that may break off cannot hit you.
  • The workpiece must be safely and properly mounted and the workpiece support correctly adjusted so that it is tight.
  • Never start the machine with the workpiece in contact with the abrasive product.
  • Grind only with the prescribed portion of the grinding tool.
    After shutoff, the machine should come to rest of its own inertia, without pressure on its surface.
  • Safety covers or hoods should be adjusted so that they direct sparks and debris away from the user’s body.
  • Use an appropriate abrasive product. An unsuitable product can produce excessive debris and dust.
  • Prevent unintentional turning on of the machine before mounting or changing of an abrasive wheel. If necessary, disconnect the machine from its power source.
  • After turning off the machine, ensure that it has come to a complete stop before you leave it unattended.
  • Grinding tools must be stored so that damage due to moisture, frost, wide variations in temperature, and mechanical causes are avoided.
  • Ensure that the grinding tool is appropriate for the task at hand. An inappropriate product can cause excessive noise and vibration.
  • Ensure that your tool is in proper condition; stop the machine in the event of excessive vibration and have it checked.
  • Keep your grinding tool, mounting flange, and grinding disc in good mechanical condition and replace them in the event of wear or deformation.
  • Carry out a “sound check” of CBN-vitrified bonded grinding tools before mounting.
  • Make sure that the holder of the grinding tool, with or without thread, fits exactly on the shaft of the machine. Risc check that the clamping flange is clean and the right size for the grinding tool to be mounted.
  • During work with an abrasive tool, ensure there is adequate air supply or protective measures for the work material being processed. An appropriate extraction system should be provided for all dry grinding processes.
  • Use “disposable adapters” (HUBs) only once.
  • Never force the abrasive product onto the mounting fixture or modify it to fit.
    Do not tighten the clamping device excessively.
  • Never remove guards from machines and ensure they are in good condition and properly adjusted.
  • Avoid damage to the abrasive product caused by excessive force, shock, or overheating.
  • Avoid clogging and uneven wear to ensure that the abrasive product is working efficiently.
  • Do not use grinding tools near flammable materials.
  • Tie back long hair, and do not wear loose clothing, ties, or jewelery.
  • Never remove or disengage protective devices on machines, and ensure that they are in proper condition and properly installed before starting the machine.
  • Avoid uninterrupted use of the grinding tool.
  • Do not use abrasive products that have been dropped, are damaged, or look as though they have been used improperly.
  • Never exceed the maximum operating speed where specified.
  • Never use a backed-off clamping flange or one with a recess for a cup wheel or grinding cone.
  • Do not use conical clamping nuts.
  • Never use grinding wheels on the face for cutting unless they are expressly marked for this use.
  • Never work with grinding tools without adequate air supply (never without breathing and hearing protection, especially in closed spaces) or without personal protective equipment (see icon).
  • Do not use cutting wheels for grinding work (never put side pressure on cutting wheels unless they have been specifically designed for such work).
  • Never mount more than one grinding tool on a single shaft.
  • Never use a grinding machine which is not in proper working condition or has defective components.


Further instructions

  • The use of respirators complying with EN149 is recommended for dry grinding processes even if extraction systems are provided.
  • Eye protection with a minimum protection of EN166 Grade B is recommended for all abrasive processes. For grinding with hand-held devices, protective glasses or face protection is recommended.
  • If the machine or the workpiece is hand-held, always use gloves and appropriate clothing. Gloves with a protection rating of at least Category 2 according to EN388 are recommended.
  • Coated abrasive products should be stored at 18 – 22 °C and 45 – 65% relative humidity.
  • Ear protection complying with EN352 is recommended for all applications where the workpiece or machine is hand-held, irrespective of the noise level.
    Work processes with hand-held grinding tools or workpieces can cause injuries due to vibration.
  • Take immediate measures if, after ten minutes of uninterrupted grinding tool use, the operator experiences tingling, pins and needles, or numbness.
  • Because the effects of vibration are more pronounced under colder working conditions, it is advisable that the hands be kept warm and the hands and fingers be exercised regularly. Use modern devices with low vibration levels.
  • Worn or defective abrasives should be disposed of in accordance with local or national regulations.
  • Be aware that the abrasive product may be contaminated with material from the workpiece or process after use.
  • Disposed abrasive products should be damaged to prevent them from being taken from waste skips and re-used.


Warning and safety notices on grinding tools and packaging

Observe safety instructions

Wear safety gloves

Wear eye protection

Wear respiratory protection


Wear hearing protection

Wear eye, respiratory, and hearing protection

Do not use damaged discs

Use safety cover


Not permitted for hand-held or hand-guided grinding

Not permitted for wet grinding

Suitable for cutting only at a 90° angle

Suitable for sanding/side grinding


Not permitted for side grinding

Use permitted only with backing pad

Trimmable flap disc

Integrated M14 thread


The flap disc is up to 70% renewable natural fibres

Can be used on all metals

Can be used on steel

Can be used on stainless steel / VA


Can be used on aluminum

Can be used on non-ferrous metals

Can be used on wood

Can be used on hard plastics


Safety instructions for assembly and use

Assembly of flap discs

When using flap discs with a thin backing pad, use the flat side of the clamping nut for fastening.

(1) Machine support flange
(2) Clamping nut

Attention: Do not use a conical clamping nut!


Assembly of flap discs with height adjustment discs

For machines with a longer threaded spindle, a height compensation washer (article number 65005, 22.2 mm) must be used to compensate for the spindle length.

(1) Machine support flange
(2) Clamping nut
(3) Height adjustment disc

Attention: Do not use a conical clamping nut!


Assembly of threaded flap discs

(1) Machine support flange
(4) Spin-on thread

Attention: Do not use a conical clamping nut!


Safety instructions for the use of grinding wheels

Ideal grinding angle may vary from 5° to 15°.
Avoid simultaneous contact on both pipe edges (e.g. square pipe). Risk of accident!
Do not grind at an extremely acute material angle. Risk of accident!


Assembly of grinding discs

(1) Machine support flange
(2) Clamping nut

Attention: Do not use a conical clamping nut!


Safety instructions for trimming

Only permitted for Eisenblätter flap discs with the "Trimmable" symbol. The ideal angle for trimming is between 20 and 45 °. Never trim at a 90 ° angle! Risk of accident!

  • Trim the disc on a sharp metal edge..
  • Trimming may only be done at an angle between 20 and 45 °.
  • Apply light pressure and gradually increase it until the carrier plate begins to trim.
  • Maintain this pressure until you expose 6 mm (1/4 ") of the sanding flaps. Trimming more than 6 mm (1/4 ") at a time can compromise the integrity of the grinding wheel.
  • Be careful not to cut through the grinding wheels. Stop when you see the glue holding the sanding flaps in place.


Assembly of cutting discs

If necessary and intended, use spacers (6) between the flanges.

(1) Machine support flange
(2) Clamping nut
(6) Spacer

Attention: Do not use a conical clamping nut!