Big unit, like the performance that it guarantees: cylinder with 70 t of force and cutting capacity over 400 mm diameter; BI400 fits to machines with operating weight from 14 to 24 t.

Technical Data

Excavator class weight 14 – 24 tons
Attachment weight 845 Kg | 1682 lbs
Min cut diameter 120 mm | 5"
Max cut diameter 400/450 mm | 16/18"
Oil Pressure 250 - 300 | 3625 - 4350 psi (min-max)
Hydraulic flow 100 – 180 l/min | 26 – 48 gal/min (min-max)
Width 1452 mm | 58"
Length 1500 mm | 60"
Height 654 mm | 25"


OMEF Big Inch was born from the idea to combine simplicity, efficiency and versatility in a single machine, joined with an in-depth design and engineering study. The result is a worldwide success: designed to work on all types of wood, “Big Inch” is able to grab, cut and hold the plant at the same time.

The efficiency of the “Big Inch” shear is granted by the quality of raw material used.  OMEF relies only on wear resistant XAR steel that makes the tree shear incredibly strong and robust and it ensures an outstanding performance even in the most extreme working conditions.

The integrated blade, which provides the highest levels of resistance, hardness and toughness, has a patented and unique profile in the world, making “Big Inch” capable of cutting down plants with a quick and neat cut.

Based on these elements, OMEF has developed the largest range of tree shears on the market with six models available. Big Inch can be fitted on operating machines starting from 2 t up to 50 t and it can be customized with several accessories able to increase the efficiency and productivity, offering the best tailor made solution for all forestry professionals.