Dental milling machines
The development of dental milling started in Switzerland in 1935 by the dentist Dr. Steiger and master dental technician Frey. The first milling machines worked on the principle of upright-drilling machines. The milling object was moved against the milling tools, which made the handling difficult to say the least. Modern milling machines have three-dimensionally moveable milling arms and are equipped with micromotors, which are used in preference to those with pressed-air turbine drives. When working in situations with low rpm (rotations per minute), the latter have no torque. If the rpm is going up to 100 000 min-1, thin milling tools will no doubt be bent.