THE 45 DEGREE ANGLE BLOCK ( PART NUMBER BLK-45 ) IS USED TO HOLD PROBE CHARACTERIZING SPHERES INCLINED AT 45 DEGREES, SO THEY ARE MORE ACCESSIBLE FOR C.M.M. CALIBRATION. THE BLOCK MAY BE LOCATED IN AN OUT OF THE WAY PLACE ON THE CMM TABLE, WHILE PROJECTING THE CHARACTERIZING SPHERE OUT INTO THE WORKING ZONE OF THE MACHINE. THIS ROBUST STEEL ANGLE BLOCK IS 3-1/2 INCH ( 3.5", 88.9MM ) LONG BY 1-1/2 INCH (1.5", 63.5MM ) HIGH AND 1-1/2 INCH ( 1.5", 38.1MM ) WIDE. TWO TAPPED HOLES THAT ARE M10 INCH DIAMETER ARE PROVIDED TO SECURE THE CHARACTERIZING SPHERE'S 1-1/4 INCH ( 1.25", 31.75MM ) DIAMETER POST. ONE TAPPED HOLE IS PROVIDED IN THE CENTER OF THE 1-1/2 INCH ( 1.5", 38.1MM ) LONG 45 DEGREE LAND, AND ONE IS PROVIDED IN THE TOP SURFACE NEAR THE END OPPOSITE THE 45 DEGREE ANGLE. THE BASE SURFACE THAT LOCATES THIS 45 DEGREE BLOCK HAS AREAS OF THE SURFACE RELIEVED TO LEAVE THREE MOUNTING PADS. THESE PADS ARE LAPPED FLAT AND COPLANAR TO FORM A STABLE CLAMPING SURFACE. A COUNTER BORED HOLE IS PROVIDED THROUGH THE HEIGHT OF THE BLOCK. USING THIS COUNTER BORED HOLE, THE 45 DEGREE ANGLE BLOCK IS CLAMPED SOLIDLY IN POSITION BY 3/8 INCH ( 0.375" ) OR A 10 MM SOCKET HEAD CAP SCREW. THIS 45 DEGREE BLOCK IS DESIGNED TO BE USED WITH THE 4 INCH ( 101.6 MM ) DIAMETER STEEL PLATFORM, PART NUMBER PLT4, SEE TECHNICAL DATA SHEET THE 45 DEGREE ANGLE BLOCK IS SUPPLIED WITH AN ATTRACTIVE BLACK OXIDE FINISH WHICH RESISTS CORROSION. THE 45 DEGREE ANGLE BLOCK IS GENERALLY PURCHASED WITH DUAL THREADED ADAPTOR SCREWS AND A PROBE CHARACTERIZATION SPHERE.