Height of gear tooth above pitch circle
Total gear tooth height
Clearance of gear tooth
Height of gear tooth below pitch circle.
Increases
remains the same
decrease
none of the above
55 degree
57.5 degree
60 degree
45 degree
110 degree
100 degree
90 degree
118 degree
For general purpose use point angle of twist drill is 118 Degree.
It is more heat resistant
has higher tool life
can be used at higher cutting speed
all the above