Helical gearing may be used in place of spur gearing
A group of gear(s) and/or worm(s), of fixed ratio, specifically designed for the purpose of decreasing the speed from the driver(s) to the driven shaft or shafts; having no reversing feature except by reversing the prime mover. See also transmission (as modified) and gearcase-motor.
Classification: Parts of gearing, gear boxes and other speed changers
NSN 4140-01-395-3912
NSN 6645-00-540-8930
NSN 5950-00-313-9509
NSN 5905-00-066-0995
NSN 6110-01-600-0188
NSN 5998-01-574-5972
NSN 6620-01-175-5922
NSN 6620-01-625-2855
NSN 5835-01-020-5650
NSN 6220-01-391-5323
NSN 5965-00-812-9158
NSN 5910-01-545-2756