THE MODEL 272 HEALD "TOOLROOM" INTERNAL GRINDER IS ENGINEERED FOR PRECISION INTERNAL GRINDING APPLICATIONS. THIS MACHINE FEATURES A 26-INCH MAXIMUM SWING OVER THE TABLE AND A MAXIMUM HOLE DIAMETER CAPACITY OF 21.75 INCHES, ACCOMMODATING A BORE LENGTH UP TO 14 INCHES. THE GRINDING ANGLE INCLUDES A MAXIMUM OF 60 DEGREES. OPERATIONAL FEATURES INCLUDE A VARIABLE SPEED HYDRAULIC WORKHEAD MOTOR DRIVING THE WORKHEAD SPINDLE, WHICH OFFERS SPEEDS RANGING FROM 133 TO 400 RPM. THE GRINDING TABLE PROVIDES INFINITE SPEEDS FROM 0 TO 15 FPM, SUPPORTED BY A 30.25-INCH LONGITUDINAL TRAVEL AND A POWER RAPID TRAVERSE OF 35 FPM. THE GRINDER IS EQUIPPED WITH A HEALD "RED HEAD" GRINDING SPINDLE AND A 12-INCH 4-JAW CHUCK. POWER IS SUPPLIED BY A 5 HP WHEELHEAD SPINDLE MOTOR AND A 1.5 HP HYDRAULIC MOTOR. STANDARD EQUIPMENT INCLUDES A SWING DOWN WHEEL DRESSER, CHUCK GUARD, WHEEL GUARD, AND A COOLANT SYSTEM. THE MACHINE REQUIRES A FLOOR SPACE OF 7'3" X 10'3" AND WEIGHS APPROXIMATELY 8700 LBS.