The Pedal Drill (also known as the treadle drill and dental engine)

In 1871, American dentist James B. Morrison (1829-1917) utilized the same foot-operated mechanism of a treadle sewing machine to create a foot operated dental drill which could achieve 2000 revolutions per minute (RPM). 

The dentist pressed a foot pedal which drove a fly wheel that was attached to a pully that made the excavating burr turn. 

Dental Drills of the 1800s
  1. Wind-Up Clockwork Drill, 1864
  2. The Pedal Drill (also known as the treadle drill and dental engine)
  3. George Green's Drilling Inventions
  4. Recollections of a Pedal Drill