Describes both geometrical and practical tests on gear nobbing machines, standard precision (vertical axis), and the corresponding permissible deviations with reference to IS : 2063-1962'Code for testing machine tools'.
1.1 It deals only with the verification of accuracy and applies neither to the testing of the running of the machine (vibrations, abnormal noises, stick-slip motion of components, etc) nor to the machine characteristics (speeds, feeds, etc) which shall generally be checked before testing the accuracy.
IS 8407-1977 history
1977IS 8407-1977 Gear Machine Test Chart Standard Accuracy (Vertical Axis)