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CMM Reference Balls

All CMM Reference Balls are serial numbered and supplied with a UKAS Certificate of Calibration.

(A) Ball Diameter (mm) (A) Ball Diameter (inches) (B) Length (mm) (B) Length (inches) (C) Thread
9.525 0.375 - 2.000 M6 or 1/4UNF
10 0.39370 50 - M6
12.7 0.500 - 2.000 M6 or 1/4UNF
15 0.59055 50 - M6
15.875 0.625 - 2.000 M6 or 1/4UNF
19.05 0.750 - 2.000 M6 or 1/4UNF
20 0.7878 50 - M6
22.225 0.8750 - 2.000 M6 or 1/4UNF
25 0.98425 50 - M6
25.4 1.000 - 2.000 M6 or 1/4UNF
50 1.9685 100 - M10