# Speed preselection

You can preselect the required speed using the speed preselection thumbwheel (5), even during operation. The information in the table below describes the recommended values.

Material | Application | Application tool | Thumbwheel position
--- | --- | --- | ---
Metal | Removing paint | Sanding sheet | 2–3
Metal | Brushing, removing rust | Cup brush, abrasive disc | 3
Stainless steel | Grinding | Grinding disc/fibre disc | 4–6
Metal | Rough grinding | Grinding disc | 6
Metal | Cutting | Cutting disc | 6
Stone | Cutting | Diamond cutting disc | 6

- The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.

Level Speed preselection | GWS 20-125 SB [min-1] | GWS 20-125 TSB [min-1]
--- | --- | ---
1 | 2800 | 2400
2 | 4300 | 3800
3 | 5800 | 5300
4 | 7400 | 6700
5 | 8900 | 8200
6 | 10500 | 9700

The values specified for speed levels are guide values.