The telehandler or telescopic handler is a heavy duty machine that is well-known within both the construction and agriculture industries. These machines are quite similar in both appearance and function to the lift truck, except it more closely resembles a crane. The telehandler offers improved versatility of a single telescopic boom which could extend upwards as well as forwards from the vehicle. The operator can connect many attachments on the end of the boom. Some of the most common attachments include: a muck grab, a bucket, a lift table or pallet forks.
A telehandler usually utilizes pallet forks as their most common attachment to be able to move cargo through locations which are usually unreachable for a standard forklift. Like for example, telehandlers can move loads to and from areas which are not typically accessible by standard forklift models. These devices also have the ability to remove palletized loads from within a trailer and place these loads in high places, such as on rooftops for example. Before, this situation mentioned above will need a crane. Cranes can be expensive to use and not always a practical or time-efficient choice.
Telehandler's are unique in that their advantage is also their largest limitation: since the boom extends or raises when the machinery is bearing a load, it also acts as a lever and causes the vehicle to become quite unstable, even with the rear counterweights. This translates to the lifting capacity decreasing fast as the working radius increases. The working radius is the distance between the center of the load and the front of the wheels.
For example, a vehicle which has a 5000 pound capacity with the boom retracted might be able to safely raise just as heavy as 400 pounds when it is completely extended with a low boom angle. The same unit with a 5000 lb. lift capacity that has the boom retracted might be able to easily support as much as 10,000 pounds with the boom raised up to 70.
The Matbro Company within Horley, Surrey, England first pioneered telehandlers. These machinery were developed from their articulated cross country forestry forklifts. Initially, they had a centrally mounted boom design on the front section. This placed the driver's cab on the equipment's back portion, like in the Teleram 40 model. The rigid chassis design with the cab located on the side and a rear mounted boom has ever since become increasingly more popular.