EK250 Bottom Drive


The EK250 Bottom Drive CFA


Standard Chassis: Cat® 340 Next Gen  
Installed Power: 346 hp 258 kW
Maximum Torque: 234,500 ft.lbs 31,800 kg.m
Maximum Diameter: 32 in 800 mm
Drilling Depth (Auger Only): 81 ft 24,689 mm
Maximum Drilling Depth: 102 ft 31,000 mm
Crowd Force: 73,326 lbf 33,000 kgf
Crowd Cylinder Stroke: 19 ft 8 in 6,000 mm
Maximum Extraction Force 117,400 lbf 53,000 kgf
Minimum Transport Weight 117,000 lb 53,200 kg
Operation Weight 190,000 lb 86,400 kg
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About the EK250 Bottom Drive CFA

The EK250 Bottom Drive CFA is configured using The revolutionary patented system Bottom Drive CFA that has the following advantages:

  • The new Cat® 340 Next Gen powered by a fuel efficient Tier 4 Final C9.1 ACERT engine.
  • Significant improvement of stability, providing greater security in the operation of CFA
  • Optimal ratio of drilling depth x equipment weight due to lower center of gravity, enabling lower transport weight and lower transportation costs.
  • Hydraulic pull-down on the rotary, centered to the drilling auger, improving the penetration in hard soils.
  • Highly effective drilling torques due to the robust drilling head.
  • Better efficiency of power due to the short length of hydraulic hoses that feed the drilling head, resulting in lower pressure loss.
  • Lighter drilling masts as a result of there being no need to resist high drilling torque at the top.
  • Higher Extraction force, resulting from the addition of push-up of the cylinder to the winch extraction force.
  • The new Cat® 340 Next Gen powered by a fuel efficient Tier 4 Final C9.1 ACERT engine.
  • Equipped with Cat® Vision Link that allows management to monitor machine operations and maintenance data online.
  • Caterpillar® variable undercarriage VH5000/4300/800. Reinforced frame H style variable undercarriage.
  • Reinforced mast, with high resistance steel Weldox 700.
Main Winch:
  • Special groove for better cable winding and longer cable life.
  • Press-roller included.
  • 2 gears allows for both high speed and high pulling force.
  • Automatic gear shifting, for seamless operation, high production.
  • Automatic down the hole winch stop.
  • Freewheeling winch during crowd operation.
  • Hydraulic and mechanical brake.
  • Hydraulic measurement of pulling force displayed in the cabin.
  • Robust design, with 2 slewing bearings on top and bottom, robust pinion and main gear.
  • 2 groups of Hydraulic Motor / Planetary Gears for high torque and long life.
  • Anti-cavitation, anti-shock and cooling system for longer hydraulic motor life.
  • Power-shift for High spin-off speed (120rpm) for quick discharge of soil.
  • 3 operation speeds and 3 spinoff speeds. For high torque and high speeds.
  • Automatic gear shifting, for seamless operation, high production.
  • Exchangeable keys, bolted. No need to rebuild keys by welding inside the rotary.
  • Hydraulic measurement of torque displayed in the cabin for the operator.
  • AM/FM Radio, Air conditioning/Heating.
  • ROPS cab & Top protection.
  • LCD monitor for Engine and Hydraulics computer, with diagnostic system.
  • CZM Canbus System for Drilling Monitoring with auto functions.
EK250 Bottom Drive CFA

Technical Drawings

EK250 Bottom Drive CFA

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CZM USA is a specialized foundation equipment manufacturer headquartered in Savannah, GA.

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