Leatherwood
Machine Shop
Shorty's QCGB
Top View---  Showing the first two gear changes.  I modeld this after Sherline's gear chart. Just look for the thread you want to cut on the chart and set the levers. The exception to this is that you do not use the "B" and "F" or "G" gears. The back cover has been removed for all the pictures taken.
Front View---  Showing the second two gear changes. Here is where you select the "E" gear and Left or Right hand threads.  The (L-R) lever eliminates the "F" and "G" gears totaly
Front View---  Showing the final gear change. Here is where you select the "D" gear.
Back View (cover removed)---  Now you can see what is happening on the inside.  I cut 17 gears for this project as well as using all the gears from the sherline threading Kit.  I could have just cut more gears but hey, I already had these.
Back View (cover removed)---  
Here is a closer view of the first and last gear changes.
Back View (cover removed)---  
Here is a closer view of the rest of the gear changes including the reverse for left and right threads. Back to Machine shop
Check out these gear cutting videos that I made and put on You Tube.
Just click on each link and they will take you to you-tube.
Part1      Part 2     Part3    Part4    Part5    Part6   Part7

Here is a link to the software that I made and mentioned in the video
GearCodeit

Here is a link to a program by Pablo Untroib who has written a similar program that also includes metric gears.
Gear cutting code generator