The BOILERMASTER™ is a boiler tube end prep machine designed specifically to make the job easier and faster in the rugged environment of a boiler. The BOILERMASTER features: integral feed and mandrel actuation ratchets (reversible) for speed and ease of use; hardened mandrel shaft with shaft seal for maximum life; extra heavy duty tool bits, and 1.5 HP pneumatic motor for maximum cutting speed and wall thickness capability. One unique mandrel with interchangeable mounting blocks provides an inside diameter mounting range of 1.25″ to 4.33″. Optional mandrels are available for mounting in .61″ to 1.00″ and 1.00″ to 1.25″ ID. Two sizes of cutter heads, each with two heavy duty wedge lock bit slots and one 1/4″ bit slot are available to provide for simultaneous beveling, facing and counter boring. The 2.63″ diameter cutter head and ratchet feed system allows the tool to work next to or between most boiler tubes (2.63″ minimum width required). The 4″ diameter cutter head is used for larger pipe sizes and to increase tool bit versatility. The BOILERMASTERs right angle drive 1.5 HP pneumatic motor requires 55 cfm of air flow at 90 psi for maximum performance.