hobbing

shaping with pinion cutter

shaping with rack cutter

milling

gang milling

straddle milling

string milling

side milling

surface finishing

under-cut gears

cycloidal gears

removing residual stresses from teeth roots

after heat treatment

prior to heat treatment

for gear reconditioning

none of these

only hob rotates

only gear blank rotates

both hob and gear blank rotates

neither hob nor gear blank rotates