Gear train calculations for engineer's lathes.
A free online program to calculate
gear trains for any screw thread
with the gear wheels that you own.
• Metric or imperial threads on
• Metric or imperial lathes
• Metric/imperial conversion gears.
• Feed rates, worm gears.
• Polygon Cutter gear ratios.
• Extensive help file, & video tutorials(below).
• Red button to search the HELP file.
• Gearboxes for various lathes are included.
• Custom gearboxes can be added.
• Ask to have your lathe with a gearbox added.
• Extra Apps:
• Thread specifications and tapping drill sizes.
• Create tables of cutting speeds.
• Taper turning calculations.
• Charts for hardness of materials.
• Color charts for hardening & tempering.
• Polygon cutter simulation.
• Electronic Leadscrew Calculations.
RECENT CHANGES 24 December 2023
• Version 32 can handle longer lists of gears
• Please contact me if you discover new bugs.
• Divided step 2 into 3 simpler steps.
• Restrict results with gears that will not fit.
• Enter list of pitches or TPI to solve them all.
• Metric-Imperial conversion gear ratios.
• Polygon Cutter Calculations & Simulation.
• ELS Electronic Leadscrew Calculations.
Need Help?: AEDLewis at g mail dot com
QUICK START GUIDE
• Enter your own data in steps 1-5 then RUN.
• Step 1 : Choose the brand of your lathe.
• Step 2 : has been divided into 3 easy steps:
• Step 2A: Design your gear train.
• Step 2B: Automatic Compound Gears on/off.
• Step 2C: Enter the gears you own.
• Step 3 : Choose what you want to calculate.
• Step 4 : Enter % error you can accept.
• Step 5 : Use ONE pitch entry method below.
• Step 5A Enter the pitch or TPI, then RUN.
• Step 5B Make table of multiple thread sizes.
• Step 5C Look up standard threads (eg UNF).
• Step 6 : Click RUN to execute the program.
• Return to menu. Alter any items. RUN again.
• Review the buttons below Step 6 RUN.
EXTRA APPS
Orange buttons: apps that DO NOT require lathe data.
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