Fibre discs: general info

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Working pressure

We advise against using too high pressure when using fibre discs. This causes heat generation, burnt areas and premature wear.

Prevent heat generation

By moving the disc smoothly back and forth you can considerably diminish the risk of burnt areas

Maximum and advised speeds

The maximum speed for all Cibo fibre discs is 80 m/s.
The ideal circumferential speed depends on the material to be worked. It is always best to work at speeds lower than 60 m/s. With silicon carbide discs, it is better to set the speeds based on the material you want to work. Please note, these speeds are not absolute, they are only a guideline. When in doubt, please consult your Cibo advisor. 

Advice on user speeds (RPM)

 Cast iron-Steel

Stainless steel

Alu-Non-ferrous metal

Hardened steel



Ø 115
7.100 - 8.2004.900 - 5.7004.500 - 5.1004.000 - 4.6002.500 - 2.900 900 - 1.200
Ø 125
6.500 - 7.5004.500 - 5.2004.100 - 4.7003.700 - 4.200 2.300 - 2.700800 - 1.100
Ø 178
4.500 - 5.2003.200 - 3.7002.900 - 3.3002.600 - 3.0001.600 - 1.900600 - 800

Center holes

 round center hole star center holecross center hole

 Fibre discs in combination with the correct back-up pad

Fibre discs must be used in combination with a back-up pad. The choice of back-up pad is important for the finish of your workpiece. 

Flexible back-up pad FIZ

Grinding with a soft contact. This guarantees a controlled removal and a finer finish. Ideally suited for use with finer grit types.

Hard back-up pad FIW

Grinding with a hard contact for a rapid and aggressive removal.



Hard back-up pad – High performance FIH

This high- performance back-up pad guarantees a hard and stable contact at all times due to its unique architecture. The ingenious composition of the disc ensures extreme heat resistance. The ribs preventing heat build-up ensure a cooler grinding process, whereby the back-up pad is not distorted under the influence of heat generation.


 Please use a high-performance back-up pad up to grit 60 to make optimal use of the fibre disc’s capabilities.

 Tips & Tricks: Grit choice and back-up pads
For a rapid, aggressive removal of material, your best option is a grit type between 16 and 50.
A hard back-up pad is used for working flat surfaces. This also guarantees rapid removal of material. In order to grind bent and round shapes, and in order to achieve a better level of finish, your best option is a flexible back-up pad.