# Speed preselection

With the speed preselection button (15), you can preselect the required speed in two stages.

Keep pressing the speed preselection button (15) until the required setting is shown in the speed indicator (16). The selected setting will be saved.

The required speed depends on the material and the working conditions; it can be ascertained through practical tests.

The information in the table below describes the recommended values.

| Basic speed setting at level
--- | ---
1 | 2
[min–1] | [min–1]
Number of speed settings |  |
2 (GDR 18V-215) | 0–2100 | 0–3300
2 (GDX 18V-285) | 0–2000 | 0–2800

You can use the button for speed preselection (15) to preselect the required speed, even during operation.