FLAP DISC FOR GRINDING WITH AN ANGLE GRINDER

Terminology: Coated abrasive flaps attached to a backing of cured glass fibre, plastic, or aluminium. It is a depressed centre type with either a flat or convex side.

Flap discs improperly used can be dangerous: they run at 80 m/s on angle grinders and can eject parts at a speed of 288 km/h (180 mph) in case of breakage. FEPA has designed this page to provide the essential safety recommendations for use of flap discs on angle grinders, with maximum diameter of 230mm.
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Abrasive Products

These recommendations focus on flap discs for grinding with angle grinders. They can be either flat or convex side.

Safety recommendations for the use of flap discs for grinding with angle grinders

FEPA general safety principles

Dos & Don’ts for these products

Soon available.

What is a safe product? What should I look for?

■ FEPA recommends that only flap discs conforming to EN 13743 and marked as such should be used.

■ Flap discus not bearing EN 13743 may not conform the highest safety standards.

■ All flap discs should be examined carefully for damage or defects before fitting on the machine.

How should I handle and store the wheels?6A

■ All flap discs are fragile. They should be handled with care.

■ Flap discs should be stored on a flat, rigid surface, avoiding damp and frost or wide variation in temperature.

■ Use the oldest discs (on “first in, first out” basis).

How should I fit the wheel on the machine?6C

■ Follow carefully the instructions given in the machine handbook.

■ Never fit a flap disc which is too loose or too tight on the flange.

■ Align the outer flange correctly as shown in the FEPA Safety leaflets for flap discs used on angle grinders (under development)

■ Tighten only with the tool supplied with the machine.

■ Ensure the disc is properly gripped to prevent slippage, but do not tighten with excessive force. Never use a hammer.

■ Keep flanges and screw threads clean and free of burrs and rust.

■ Replace distorted or damaged flanges before fitting the disc.

■ Refer to the FEPA recommended mounting check list.

How should I protect myself?

■ FEPA recommends the use of following personal protective equipment (often written PPE) :

Eye protection
Ear protection (ear sets)
Hand protection (gloves)
Lung protection (dust mask, also called respirator)

■ Never remove the protective machine guard and make sure it is properly adjusted to deflect debris away from you.

■ Ensure that no other person is at risk, especially near the machine while working.

How should I handle the wheel after use?6E

■ Before storing the machine or transporting it to another location, always remove the disc and store it as recommended.

■ Always carefully examine the flap disc for damage or defects, and destroy and discard if damaged.

■ Do not fit worn out discs on a smaller machine. Destroy them.

■ When disposing of worn out or defective discs, it is recommended to damage them to prevent someone from removing them from waste and re-using them.

How can I get proper training?

■ It is a legal requirement for all employees involved in the use of abrasives discs to be properly trained and re-trained on a regular basis. They should consult their employer if they have not received this training.

■ The disc manufacturer or supplier can advise you on suitable accredited training providers.

■ As a private consumer, you should read carefully the safety information found in:

The grinding machine handbook
The FEPA general safety principles leaflet (see above)
The FEPA safety leaflet for the use of flap discs on angle grinders (see above)

This website is intended to give information on safe use of abrasives in compliance with European standards, and not to give advice on product selection. You should read the information given on the product or its packaging to determine suitability. For any specific question, contact the retailor who supplied you the product.