HR 420-800 DW

Main Features

Model Name : HR 420-800 DW

Category : Diaphragm

Bucket Kits avilable : TR

Max Size (mm) : 1200 x 3000

Max Depth (m) : 60

Weight (tons) : 120 – 135

The HR 420-800   is our largest model, it has been designed and built specifically for the realization of jobs that require drilling large diameters and great depths. 
This drilling rig can be equipped with different rotary with different torque values ​​based on the work needs. The rotary, in addition, can be set up with the MCS  (MAIT Casing System) or torque multiplier, which exerts a maximum nominal torque of 800 KNm in the insertion and extraction of form pipes up to a maximum diameter of 3,000 mm. The HR 420-800 is not limited to the conventional drilling system with rod, but can work with a column rotating vice, continuous flight auger (CFA), diaphragm walls with the rod and piles driven with hydraulic hammers. The HR 420-800 is also available with a push-pull winch (THD), which allows for a greater stroke of the rotary hoist along the tower, thanks to which longer pipe sections can be used.

Bucket Kit
TypeGuided with telescopic square rod Rotation ± 180°
Winches
Rated Pull Main Winch250 -300 – 400* KN56,200 – 67,500 – 90,000* lbs
Rated Pull Auxiliary Winch120 – 180 KN27,000 – 40,500 lbs
Motor
BrandCATERPILLAR
ModelC15
Power403 KW @ 2.100 rpm540 HP @ 2,100 rpm
Plumbing System
Hydraulic Oil Tank1,000 liters264 gal
Fuel Tank600 liters159 gal
Expandable Tracked Undercarriage
Length6.400 mm21 ft
Length3.500 – 5.100 mm11.5 – 17 ft
Soles1,000 mm3.3 ft
Weight
Approximate Weight135 tons297,700 lbs
Diaphragms
Max Size1,200 x 3,000 mm4 x 9.5 ft
Max Depth60 m197 ft