Distance between outside circle to pitch circle
Distance between outside circle to root circle
Distance between pitch circle to root circle
Distance between outside to bottom point of gear
0.1 mm
0.01 mm
0.2 mm
0.02 mm
Screw gauge
Vernier caliper
Gear tooth vernier caliper
Feelar gauge
Lock the index crank in position
Eliminate counting holes each time
Fix the index plate on its correct location
Avoid the back lash of worm and Worm wheel
20
28
40
46
