THE MODEL 275 HEALD "SIZEMATIC" EXTENDED-BRIDGE INTERNAL GRINDER IS AN AUTOMATED MACHINE FEATURING A 48" EXTENDED, SWIVELLING BRIDGE. THE GRINDER IS EQUIPPED WITH AN ANILAM "MINI-WIZARD" DIGITAL READOUT SYSTEM, A BEHIND-WHEEL DRESSER, AND A 10" 3-JAW CHUCK. GRINDING IS PERFORMED BY A 14000 RPM HEALD "RED-HEAD" GRINDING SPINDLE POWERED BY A 5 HP/3600 RPM MOTOR. CATALOG SPECIFICATIONS INCLUDE A MAXIMUM SWING OVER THE TABLE AND INSIDE THE COOLANT SPLASH GUARD OF 16". THE MACHINE CAN GRIND BORE DIAMETERS FROM A MINIMUM OF .125" UP TO A MAXIMUM OF 5.5", WITH A MAXIMUM BORE LENGTH OF 5". THE TABLE LONGITUDINAL TRAVEL IS 16", AND THE BRIDGE GRINDING ANGLE HAS A MAXIMUM INCLUDED ANGLE OF 30-DEGREES. THE WORKHEAD FEATURES A 1.625" HOLE THROUGH THE SPINDLE, A MAXIMUM SWIVEL ANGLE OF 60-DEGREES, AND FOUR SPEEDS RANGING FROM 133 TO 400 RPM, DRIVEN BY A 1.5 HP MOTOR. GRINDING TABLE SPEEDS ARE INFINITELY VARIABLE FROM 0 TO 20 FPM. CROSS FEED RANGES INCLUDE .0001" TO .001" FOR ROUGHING AND .0001" FOR FINISHING. THE OVERALL DIMENSIONS ARE 14'9" L X 5'6" W, WITH AN APPROXIMATE WEIGHT OF 13000 LBS.