Making Worm Gears. Harder Than You Might Think

Artisan Makes March 16, 2024
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Artisan Makes

@artisanmakes

About

G'day everyone. Here on the Artisan Makes channel I create home machine shop videos. With a small workshop and modest equipment, I will show that almost anything can be made with an import lathe, and a small milling machine. I hope you learn something new and enjoy your time here. Cheers Big Lathe: Hafco Al 250G Red Lathe: Sieg C3 7x14 Mini Lathe Small Lathe: Sherline 4410 CNC Vertical Mill: Sieg X2.7l *The Facebook account Artisan Makes is not me and is posting stolen content.

Video Description

G'day everyone, I have made countless spur gears on the channel, mostly because they are relatively easy to make with a dividing head and the correct gear cutters. However they are not very space efficient when it comes to making large gear reductions i.e. 40:1 or greater. This is where me might turn to a worm gear. For a worm gear, the gear reduction equals the number of teeth on the worm wheel. A 60 tooth worm wheel will yield a 60:1 reduction and a 60 times greater mechanical advantage. However making them is not as straightforward as you would think. Worm wheels are not simply spur gears that have been tilted back in the dividing head to create a slant. They are a helical gear and they need to be hobbled. There are videos on YouTube where people use taps to make "worm wheels" which look like worm wheels, but are not the correct profile and I doubt would work correctly under any proper load. Without a proper hobbling machine, I will need to free hob the gears using the lathe. #diy #machining #wormgear https://en.wikipedia.org/wiki/Profile_angle https://en.wikipedia.org/wiki/Pressure_angle Timestamps 0:00 - Intro & Gear Theory 4:27 - Making The Worm Screw 9:39 - Making A Gear Cutter Arbor 12:23 - Making A "Not A Worm Gear" 17:24 - Making A Gear Hob 21:19 - Free Hobbing Helical Worm Gears

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