EX20  

NOMINAL TORQUE*  25,000 ft-lb (34 kNm)

ACTUAL TORQUE*    21,000 ft-lb (29 kNm)

LINEPULL                     14,000 lb  (62 kN)

DEPTH**                               80 ft (24.4 m)

WEIGHT**                   37,000 lb (16800 kg)


The EX20 ExcaDrill leverages the proven designs of the EX series, including the signature single layer freefall kelly winch on a smaller excavator class. The variable drive rotary provides 25,000 ft-lbs, 100 rpm spinoff and up to 6 round or square bars making it ideal for 18" to 48" shafts.

Click here for ADSC article on the Excadrill EX line.


Call for details


Further inquiries: 800-927-8486

email sales@watsonusa.com

or submit web inquiry below.


* Nominal Torque (aka Rated Torque) is what is typically published by manufacturers.  It is a theoretical value that ignores the 15% - 20% efficiency loss present in all hydraulic rotaries.

* Actual Torque is the usable torque at the tool determined through testing of every Watson rig. This value is not typically shared by manufacturers.


**Varies depending on excavator mount and bars

EX20 key ADVANTAGES


  • VARIABLE DRIVE HYDRAULIC ROTARY SYSTEM

    The variable displacement rotary enables shiftless operation from 25,000 ft-lbs  to 100 rpm spinoff. Without clutches, gear changes or sensors, simplicity, and thus reliability is achieved.

  • FULL EXCAVATOR POWER

    Hydraulics are designed to harness the full horsepower of the excavator and deliver it to both the tool and the winch for maximum production.

  • LARGER DIAMETER ROTARY

    The larger the rotary, the bigger the Kelly bars, the bigger the bearings, the less wear and tear.  Larger diameter also means more kelly bars for greater depth without trading off kelly tube thickness and drive lug area.

  • FULL length TOP CROWD

    Full length top applied crowd force drills straighter holes and simplifies Kelly locking.

  • SINGLE LAYER, GROOVED KELLY WINCH drum

    The Kelly winch is fitted with a rear roller and a large diameter grooved drum big enough to keep all of the wire rope on one layer.  Speed and consistent linepull are achieved along with excellent rope management and long rope life.

  • PROPRIETARY CONTROLLED FREEFALL KELLY WINCH

    Watson's proprietary controlled freefall winch achieves the performance of prior freefall systems with even greater control over the tool while rapidly descending down the hole. The freefall is combined with a variable speed motor giving the EX unbeatable cycle times.

  • OPTIMIZED and iNDEPENDENT HYDRAULIC INTERFACE

    Integration to the excavator has been carefully managed to limit the overlap of the systems by providing dedicated valves for the drill. By cleanly separating the two systems, diagnostics, servicing and maintenance of the drill can be distinct from the excavator.

  • INTERCHANGEABLE SQUARE friction OR ROUND locking KELLY BARS

    Heavy duty Kelly bars made from high strength alloy steel are standard on Watson rigs. The EX series has the capability to quickly and easily switch between square or round locking bars to best suit your drilling needs for a given job.  

  • Patented round locking bars

    Watson has always built the heaviest duty round locking kellys in the business. The latest generation incorporates patented features designed to eliminate the hassle of finding locks while vastly extending the time between servicing. With 4x the torque surface and 6x the crowd surface or most competition, customers are able to go years between refurbishing bars.  Additionally, open bottom design allows easy drainage for slurry drilling.  Call for details.

  • TOOL REACH

    Boom mounted design brings versatility unmatched by mobile mounted rigs. Tool reach of more than 10 ft from the tracks can be achieved on the proper excavator.

  • REDUCED WEIGHT and smaller excavator classes

    Unique trunnion & rotary design of the EX series transfers drilling loads directly from the rotary to the mast thereby reducing weight and stress on the mast.  This weight savings allows the machine to be mounted on smaller excavator classes than previous generations of Excadrills.

  • EASY TRANSPORT

    The low weight of the EX20 allows for easy affordable transport and can even be loaded onto a standard stepdeck trailer.

  • CUSTOMIZATION to fit customer application

    WATSON is a custom manufacturer that welcomes the opportunity to customize rigs.  EX rigs can be mounted to numerous makes and models of excavators and further modified to fit specific applications requirements like railcar mount, 10' mast heights, zero turn, etc.

Typical applications

The EX20 Excavator attachment offers  mobility, reach and low clearance while retaining the speed and toughness of larger Watson Rigs.  Mast lengths down to 10 ft  and excavator classes down to 10 ton allow exceptional performance on limited access jobs.

  • Civil Roadways
  • Caissons
  • Elevator shafts
  • Light Commercial
  • Rock drilling
  • Roadway Signs, guardrails
  • Electrical distribution



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