HR 420-800 THH
Main Features
Model Name : HR 420-800 THH
Category : Pile Driving
Max hammer weight (tons) : 22.5
Max pile length (m) : 24
Max pile weight (tons) : 9
Weight (tons) : 135




The HR 420-800 is our largest model, which has been specially designed and built for carrying out works requiring large bore diameters at great depths.
This one of a kind drilling rig can be equipped with different rotaries with different torque values depending on your job requirements. The rotary can also be set up with the MCS (MAIT Casing System) or torque multiplier which can exert a maximum nominal torque of 800 KNm for insertion and extraction on the casing tubes up to a maximum diameter of 3000 mm.
The HR 420-800 is not limited to the conventional kelly bar drilling system, but it is able to utilize Casing Oscillators, Continuous Flight Auger (CFA), Diaphragm Walls by kelly bar system, and Driven piles with hydraulic hammers. The HR 420-800 is also available with a crowd winch system (THD), which allows a longer stroke along the length of the mast, therefore longer casing sections may be used when drilling.
winches | ||
1st winch nominal publlback | 300 KN | 67,443 lbs |
2nd winch nominal pulldown | 120 – 200 KN | 27,000 – 45,000 lbs |
engine | ||
brand | CATERPILLAR | |
model | C15 | |
power | 403 KW @ 2.100 rpm | 540 HP @ 2,100 rpm |
hydraulic system | ||
hydraulic oil tank | 1,000 litres | 264 gal |
fuel tank | 600 lit | 159 gal |
crawler | ||
length | 6.400 mm | 21 ft |
width | 3.500 – 5.100 mm | 11.5 – 17 ft |
shoes | 1,000 mm | 3.3 ft |
weight | ||
approx. weight | 135 tons | 297,700 lbs |
Works with Hydraulic Hammer | ||
Hydraulic hammer types | with ram up to 14 tons | |
Max hammer weight | 22,500 kg | 49,590 lbs |
Max pile length | 24 m | 78.7 ft |
Max pile weight | 9,000 kg | 19,836 lbs |