Geared traction elevators

Listing ID #3298784

As the name implies, the electric motor in this design drives a gear-type reduction unit, which turns the hoisting sheave. While slower than a typical gearless elevator, the gear reduction offers the advantage of requiring a less powerful motor to turn the sheave. These elevators typically operate at speeds from 350 to 500 feet per minute (1.7 to 2.5 meters per second) and carry loads of up to 30,000 pounds (13,600 kgs). An electrically controlled brake between the motor and the reduction unit stops the elevator, holding the car at the desired floor level.