The PBM 4500 machine comes with a torque accepting mandrel, built with a worm gear drive unit for extra torque to handle extra thick pipe walls. Our machines are the only machines on the market that can bevel, face,counter-bore 1inch wall - worry free from damaging the gears. PERFORMANCE: Lock in mandrel blades (no springs to lose) Adjustable keyway on machinemandrel (eliminates backlashchatter) 1 hp pneumatic motor 24 lbs. approximate working weight Hardened mandrel 55 Rc. (less chance of gouging with metal chips) Three slots to do beveling, facing, deburringcounter-boring Single mandrel with mandrel blades to cover size ranges TECHNICAL SPECS: Size range 1.25 to 4 inches Pipe (31.74 mm -101.6 mm) Max wall thickness to 1inch Air Power requirements: 70 cfm at 90 psi. For PBM-4500 accessories, please visit our websitecontact our sales department for further assistance.