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 5920-01-480-4360
NSN 6105-00-227-1412
NSN 5965-01-126-4178
NSN 5945-01-557-4417
NSN 6150-01-222-1472
NSN 6150-00-401-8084
NSN 5930-00-935-2151
NSN 5855-00-127-5559
NSN 6150-01-039-7631
NSN 2925-01-330-2988
NSN 6685-01-559-0177
NSN 5985-00-040-0412