On Apr 16, 3:12*pm, DougC wrote:
I may come to need a pair of helical gears to change a shaft direction
90 degrees, with a reduction of about 4:1 to 5:1 .

Though they are a bit large, the cheapest sources of these is the gears
from car axles. The stress they will be placed under in my use will be
drastically less than what they'd get moving a car around....

Are you looking for one unit or a steady source?

Speed, torque, horsepower?

jsw