Kelly Bar

The EK300SM


Standard Chassis: Cat® 352 Next Gen  
Installed Power: 424 hp 316 kW
Maximum Torque: 252,000 ft.lbs 35,000 kg.m
Maximum Diameter: 15 ft 4,600 mm
Standard Drilling Depth: 60 ft 18,300 mm
Crowd Force: 82,650 lbf 37,500 kgf
Crowd Cylinder Stroke: 9 ft 2,750 mm
Main Winch Line Pull: 71,000 lbf 32,200 kgf
Minimum Transport Weight: 107,300 lb 48,500 kg
Operation Weight: 199,900 lb 90,700 kg
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About the EK300

At CZM we understand the importance of listening to our customers in order to keep producing innovative solutions and better products. We responded to market demands for increased power and reduced transport costs with the EK300 and EK300 Short Mast.

The EK300SM can work under a minimum working height of 30 feet at its tallest position, and still drill down to 60 feet with a five-element interlocking Kelly bar capable of handling full torque. With the mast boomed frontward and down, it is possible to work under as few as 25 feet overhead clearance, making it the shortest low clearance machine in the industry.

  • The new Cat® 352 powered by a fuel efficient Tier 4 Final C13 ACERT engine.
  • Equipped with Cat® Vision Link that allows management to monitor machine operations and maintenance data online.
  • Caterpillar® variable undercarriage VH5440/4900/900. Reinforced frame H style variable undercarriage.
  • Reinforced mast, with high resistance steel Weldox 900.
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.
  • 3 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.

Technical Drawings


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

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