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  • Writer's pictureGeorge Ficken

The Wart Hog Millhog Tube Beveling Tool

The Wart Hog is a center staple of the Millhog product line from Esco Tool Company. These right angle pneumatic (or electric) milling motors have been used by boilermakers for over 65 years to bevel, face and remove membrane from waterwall boiler tubes.

A pipe milling end prep tool for beveling water wall boiler tubes at biomass processing facilities in preparation for precision welding repairs is being introduced by Esco Tool of Holliston, Massachusetts.

The Esco Wart MILLHOG® is a boiler tube beveling machine that features a rigid I.D. clamping system and uses TiN (titanium nitride) coated cutter blades to machine carbon

steel or highly alloyed tubes without cutting fluids. Capable of beveling, facing, and boring simultaneously, tooling changes are simple for machining water boiler tubes from 2” to 3” O.D.

Rigidly attaching to the tube with clamps that fit into I.D. and expand on the mandrel using a self-centering draw rod assembly and attached wrenches, the Esco Wart MILLHOG® boiler tube beveling machine is sealed to prevent debris from entering the tool. Designed with highly reliable dual opposed taper roller bearings, it is offered with pneumatic and electric motors.

Contact GSI today for training, rentals, demos, sales and 24/7 tool deliveries in the Gulf Coast region. We stand ready to support your next project with expert advice, a huge rental inventory and quick response times.

George Ficken

Owner - GSI Inc



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