Ride The Gear Train!"
Find the change gears needed to produce any screw thread.
Data is for South Bend clones including Boxford lathes but should work for other clones as well.
A PHP program by Evan Lewis: AEDLewis at gmail.com
Link to this program: www.HeroSteamEngine.com/ridethegeartrain.php
Recommended: Boxford Users Group
The authors' lathe videos: Evans YouTube Playlists
This includes a video: Understanding Geartrains
Lathe project-2000 year-old steam engine: HeroSteamEngine.com
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DATA ENTRY

Screwcutting Gearbox Fitted? Yes (eg Model A)
No (eg Model B or C)
Lathe Type IMPERIAL
METRIC
Thread Type IMPERIAL
METRIC
Include Compound Gears? yes (complex setup)
no (fewer results)
Pitch (mm) or Threads Per inch

OPTIONAL ENTRIES:

Error %
(amount of error acceptable eg 0 for exact solutions or 0.2 0.5 1 or 2)
Restrict Output
(number of results displayed)
Extra Change Gears
(Temporary eg 16,38,56)
Extra Compound Gears
(eg 127,100,135,80) They do not need to be in pairs.
Delete existing change gears?
(Use the list entered above.I have a different set.)
yes
no
Delete existing compound gears?
(Use the list entered above.Too many in existing list.)
yes
no

Using the BACK button will retain your data. Otherwise:

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