Please see the drill speeds by bit size below:
#1 (1/8"–1/2"): 1400 RPM
#2 (3/16"–1/2"): 1400 RPM
#3 (1/4"–3/4"):
1/4"–9/16": 1000 RPM
5/8"–3/4": 800 RPM
#4 (3/16"–7/8"):
3/16"–1/2": 1400 RPM
9/16"–7/8": 800 RPM
#5 (1/4"–1-3/8"):
1/4"–1/2": 800 RPM
5/8"–7/8": 600 RPM
1"–1-3/8": 480 RPM




