How to turn a metric thread using an imperial lathe with a leadscrew measured in threads/inch (TPI)

[@nullsnaggle5198]

Gotta say this is extremely useful

[@samehdarawshi3537]

very glad i found your channel

[@Evan-e-cent]

Glad to be of some help.

[@shaurus68]

Thank you, very clear info and explained well

[@Kev7325]

Considering that the 100 tooth gear isn't meshing with anything what is the purpose of 127 divided by 100. The 56 tooth lead screw gear is meshing with the 127 tooth gear not the 100 tooth gear.

[@Evan-e-cent]

You are correct, but I did point out that the way the gear train was set up was not correct as the 127 T gear was acting as an IDLER gear, and as you correctly stated the idler gear does not affect the gear ratio. This video clip at 2:30 minutes is the way the gear train was set up to cut imperial threads on this imperial lathe, ie standard setup. However, at 3:30 minutes I show in detail how the 56T gear should be removed and a spacer added so that it meshes with the 100T gear. So the explanation is correct if you keep watching. I think I should explain this in the program notes (above). I will give you credit. The results of the RideTheGearTrain.com program were correct and the graphic showed how the gear train should be set up for imperial to metric conversion ie: with a 20T stud gear driving the 127T compound gear, which becomes a 'driven gear'. Then the 100T gear drives the 56T leadscrew gear. The gear ratio is then 20/127 x 100/56. With 100 on the top line and 127 on the bottom line, this introduces the ratio 100/127. This is like dividing by 127/100=1.27 required for metric conversion (1.27 x 2 = 2.54). Thanks for pointing this out.

[@ARIFINLATHE]

Thanks for the information bro🤝🤝🤝🤝

[@O_JAVATEKNIKMANDIRI]

Thanks bro❤❤❤❤