Collection: Grinding Disc

A grinding disc is thick, around six to seven millimetres, and designed to work at an angle, on its face. It removes material where a cut-off wheel cuts a line, and one does not replace the other.

The 5 references in the catalogue

• 3M Cubitron 3 and Cubitron II Flexible.
• Klingspor PS22K.
• PFERD CC-Grind STEELOX.
• 3M Scotch-Brite PRO DP-UD, deburring disc.

See also our bonded abrasive discs, our cut-off wheels and our flap discs.

Never grind with a cut-off wheel

It is the most dangerous mistake in the workshop. A cut-off wheel has no lateral strength: grinding flat loads it in the only direction in which it can take nothing, and it is a classic cause of bursting.

Some so-called two-in-one discs are formulated to accept both uses. This versatility must be stated explicitly on the label; it cannot be assumed.

The working angle

A grinding disc works at roughly twenty to thirty degrees. Flat, it sands over its whole surface, heats up and clogs. Too steep, it attacks with its edge, digs a groove and wears out in seconds.

Flexible discs

A flexible grinding disc is thinner and deforms slightly under pressure. It follows a curved surface better and leaves a finer finish, at the cost of a lower removal rate. It sits between the conventional grinding disc and the flap disc.

Markings to check

The maximum permissible speed, the expiry date, and for stainless steel the iron, sulphur and chlorine free marking. All three are limits, not guidance.