Two systems of classification have arisen to describe a forklift truck’s mast in detail.Īn operating manual may classify the mast either by the lift mechanism or by the number of mast “sections”. The mast consists of a fork and an elevation mechanism, associated with the lift truck’s hydraulic assembly. The mast is the system in a forklift that performs load lifting. 3 Stage Mast Forklift What is a forklift mast? The inclusion of full free lift does impair the driver’s visibility however, as the mechanism requires a hydraulic ram situated within the center of the mast. This is particularly useful if operating in tight overhead height restriction. The lift mechanism within a forklift truck mast is typically either ‘standard’ or ‘full free lift.’Ī standard mast offers maximum visibility to the driver as there is a clear gap between the outside of the lift carriage, however for the forks to move, the mast itself must move.Ī ‘full free lift’ mast allows the lifting of the forks without the raising of the mast itself. Triplex masts are generally more sought after as the inclusion of an additional carriage ensures maximum lift height that condenses down into minimal closed height. A duplex mast has two carriages, or stages, whereas a triplex mast has three carriages or stages. The number of carriages within the overall mast mechanism denotes how many ‘stages’ there are within a mast. The number of carriages within the overall mast mechanism.3 Stage Mast Forklift Forklift mast typesįorklift truck masts are typically described in two ways: The combination of a machine that can lift in a container and still lift outside the container makes container mast units very versatile, but like everything, there is a trade-off. They achieve lift heights of up to 4.7 meters in a standard forklift and up to 5.0 meters in a compact and some electric counterbalance units.īasically, you can drive inside a container or under a mezzanine floor and lift up, without putting the mast of the forklift through the roof or the floor of your Mezzanine. Most Container masted forklifts are also 3 stage masts. The term container mast is widely used in the forklift industry. This mast type is a good choice for general warehouse applications. The outer rails allow for free lift, and the two inner sections can lift loads higher than a two-stage. 3 stage mast forklift: A three-stage mast consisting of an outer mast, a middle mast, and an inner mast, each mast slidably and nestable engaging an adjacent mast and configured for a positive and negative lift along the length of each mast.Ī first linkage system comprising a cylinder assembly mounted on the outer mast and a chain fixed at opposite ends to the outer and middle masts, therebetween engaging a pulley on the cylinder assembly, wherein the first linkage system achieves a 2:1 movement ratio of the middle mast to the cylinder assembly.Īnd a second linkage system comprising a chain fixed at opposite ends to the outer and inner masts, therebetween engaging a pulley on the middle mast, wherein the second linkage system achieves a 4:1 movement ratio of the inner mast to the cylinder assembly 3 Stage Mast Forklift 3 Stage forkliftģ-Stage – A three-stage mast, or triplex, is the most versatile forklift mast and also the most popular.
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