Model S 600A has a pole change 2-speed motor and 8 spindle speeds obtained by means of sliding gears. Controlled by two speed selector levers. Speeds may be changed without stopping the machine. Drilling capacity in steel up to 1 1/2. The provision of automatic power feed to spindle ensures the maximum utility of these drilling machines for maintenance work in the repair shop, and also for the toolroom, where rapid changes of drill sizes are required. For production work, the two rates of power feed facilitate work and ensure efficient output.