THIS SMALL BALL BAR (DUMBBELL) CLAMP, PART NUMBER FS-LBB-S IS INTENDED TO HOLD INSPECTION DEVICES ON VERY SMALL COORDINATE MEASURING MACHINES. IT IS USUALLY USED IN CONJUNCTION WITH THE ANCHOR CROWN, PART NUMBER AN-CR.

IT IS ALSO CONVENIENT FOR HOLDING THE THREE QUARTER INCH ( 3/4", 0.75", 19 MM ) DIAMETER, FOUR INCH ( 4.0", 101.6MM ) LONG GAGE BLOCK, PART NUMBER GB-4, ON THE TRIMOUNT COLLAR, PART NUMBER FS-3 FOR CONVENTIONAL C.M.M. EVALUATION. MEASURING A GAGE BLOCK IS NOW REQUIRED BY THE REVISED ANSI B89.4.1-1997 SPECIFICATION FOR "PERFORMANCE EVALUATION OF COORDINATE MEASURING MACHINES".

THE THREE-QUARTER INCH ( 3/4", 0.75", 19MM ) DIAMETER CYLINDER OF THE BALL BAR OR GAGE BLOCK IS HELD IN THE VEE BLOCK OF THE CLAMP BY A SNAP OVER BAR AND A SMALL THUMB KNOB.

THIS VERY SMALL BALL BAR (DUMBBELL) CLAMP IS ONLY TWO INCHES (2.0", 50.8MM) WIDE, TWO INCHES (2.0", 50.8MM) THICK AND THREE INCHES ( 3.0", 76.2MM ) HIGH.

IT HAS A ONE HALF INCH ( 1/2", 0.5", 12.7MM ) DIAMETER TIE DOWN HOLE THROUGH THE FLAT FACE.

ALTHOUGH THIS DEVICE IS SPECIFICALLY DESIGNED FOR USE WITH THE CROWN, IT CAN BE EASILY ADOPTED FOR USE ON CUSTOMER SPECIFIC HOLDING DEVICES.