Grapple saws for cranes and excavators. GMT explicitly emphasises that the weight of the severed tree section must be evaluated against the crane or carrier's lifting capacity — a point that matters greatly in Australian hardwood work.
GMT specialises in grapple saws for cranes and excavators, and the range is built around one commercial proposition: control of the severed section.
The company is notably explicit about the constraint that most often catches buyers out — that the weight of the severed tree section must be evaluated against the crane or carrier's lifting capacity. Cutting diameter and allowable piece weight are unrelated specifications, and for green Australian hardwood the lift limit binds well before the saw does.
The range spans compact units through to larger heads with double-cut capacity, and Total Tree Control braking variants for managed lowering where sections must be controlled rather than simply held.
An equipment reference that only says where a brand fits is a brochure.
Grapple saws are sold on cutting diameter and constrained by lifting capacity, and those two specifications are unrelated. This is the single most consequential misunderstanding in the category, and manufacturers themselves warn about it.
What is available to lift timber is the carrier's lift chart at working radius, minus attachment weight, minus rotator weight, minus quick coupler weight. That remainder is the real limit. A grapple that can cut a 550 mm limb will frequently be unable to hold one safely at the reach the job requires.
Australian conditions sharpen the problem considerably. Green eucalyptus is substantially heavier than the equivalent softwood section of identical diameter, so a head specified against northern-hemisphere assumptions will hit its workload limit sooner here than the brochure suggests.
Specify accordingly: establish maximum grapple load first, calculate realistic green hardwood section weights for the work you do, then check the lift chart at the radius you actually work at. Cutting capacity is the last number to consider, not the first.
Where another supplier would genuinely serve the same requirement better.
Published specifications, commercial fit and verification points for each.
Benchmark specifications, buying criteria and specification traps for each class.