A spur gear of 40 teeth is machined in a gear hobbing machine using a double start hob cutter. The speed ratio between the hob and the blank is
A. 1:20
B. 1:40
C. 40:1
D. 20:1
Answer:D
A spur gear of 40 teeth is machined in a gear hobbing machine using a double start hob cutter. The speed ratio between the hob and the blank is
A. 1:20 B. 1:40 C. 40:1 D. 20:1