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BORED PILES » HR 420-800

Main specs overview

  • Model name
  • HR 420-800
  • Category
  • BORED PILES
  • Max torque
    (KNm)
  • 800
  • Max Diameter
    (mm)
  • 3000
  • Max Depth
    (m)
  • 110
  • Weight
    (ton)
  • 120 - 135

More details

Description

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 rotarys 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.

Technical data

Rotary
Nominal torque available 280 - 360 - 420 KNm 206,500 - 265,500 - 309,800 lbsft
Nominal torque with MCS 800 KNm 590,050 lbsft
Nominal pull-back/pull-down 400 KN 90,000 lbs
Unloading speed 130 rpm
Stroke 14.500-19.500 mm (THD version) / 7.000 mm (CP version) 48 - 64 ft (THD version) / 23 ft (CP version)
Winches
Main winch nominal pullback 250 - 300 - 400* KN 56,200 - 67,500 - 90,000* lbs
Secondary winch nominal pullback 120 - 180 KN 27,000 - 40,500 lbs
Engine
brand CATERPILLAR
Model C15
Power 403 KW @ 2.100 rpm 540 HP @ 2,100 rpm
Hydraulic system
Hydraulic oil tank 1.000 liters 264 gal
Fuel tank 600 liters 159 gal
Crawler
Total length 6.400 mm 21 ft
Total width 3.500 - 5.100 mm 11.5 - 17 ft
Shoes 1.000 mm 3.3 ft
Weight
Approx weight120 - 135 ton 264,500 - 297,700 lbs

Working characteristics

Works with Augers & Buckets
Max Diameter 3.000 mm 10 ft
Max Diameter with Casings 3.000 mm (CP version) / 2.600 mm (THD version) 10 ft (CP version) / 8.5 ft (THD version)
Depths 40 - 50 - 60 - 70 - 90 - 110 m 131 - 164 - 197 - 230 - 295 - 360 ft
Works with Casing Oscillator
Max Diameter 2.500 mm 8 ft

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