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 6150-00-925-2465
NSN 5930-01-135-6002
NSN 5996-00-140-8732
NSN 5990-00-087-6177
NSN 5950-01-604-9435
NSN 5915-01-442-4245
NSN 2925-01-318-8853
NSN 5965-01-005-0341
NSN 5835-00-779-2836
NSN 6685-00-940-7233
NSN 6135-01-571-7488
NSN 6650-01-063-6604