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

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 applied crowd force drills straighter holes and simplifies Kelly locking.

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.

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.

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.

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.  

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.

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.

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.

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