These are used extensively in factories and storage facilities for the movement of goods between floors. Two kinds of elevators are on offer – Drum-wound machine based or traction machine based.
The capacities of available elevators range from 250 Kg to 10 Tons. Goods and workers can be transported to any number of floors. The size of the elevators can be from 3′ x 2′ to as large as 12′ x 20′. Standard height of the cabin is 6′ 71/2″. The elevator can open on opposite sides as well (2 side open cabin).
Drum-wound type without counterweight
This elevator is simpler in design and suited for low cost installations. The movement of the elevator is based on the coiling and uncoiling of a wire rope on a rotating drum. One of the unique features of our drum design is the provision of two ropes coiling separately on a right hand thread groove and a left hand thread groove. This leads to lesser rope stress and longer life. These elevators are quicker to install and require lesser space.
Traction type with counterweight
This elevator is a better machine both in terms or design and consumer safety. This is achieved first through the use of 3 or more independent wire ropes stretched across the main traction sheave. Since, there is no positive coupling between the elevator and the machine; it leads to greater safety as a slip is permitted whenever there is an obstruction to the elevator travel. Unlike in the drum wound design there is no overload on the motor in case of the elevator overshooting at the top floor. Jerk free, smooth travel is possible by the usage of 2:1 roping. Though smoother, traction elevators travel at higher speeds than drum-wound elevators using the same power.