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  1. #1
    Join Date
    Nov 2018
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    Tasmania
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    Wink Homemade Quick Change Gearbox Complete

    I've finally finished my quick change gearbox for my lathe!
    It's been a 8 month long project from design to completion

    Designed from scratch, made from scrap!

    I have a build series on youtube https://www.youtube.com/playlist?lis...qmbdWe3U7kc-MX


  2. #2
    Join Date
    Nov 2017
    Location
    Geelong, Australia
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    57
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    Awesome effort - well done!

    Steve

  3. #3
    Join Date
    Nov 2007
    Location
    melbourne australia
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    3,228

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    Impressive!
    Chris

  4. #4
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    6,439

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    Hi Tommy,

    Very nicely done, I like the handle on the back ! Does it just turn the leadscrew ?
    Best Regards:
    Baron J.

  5. #5
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    Nov 2018
    Location
    Tasmania
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    Quote Originally Posted by BaronJ View Post
    Hi Tommy,

    Very nicely done, I like the handle on the back ! Does it just turn the leadscrew ?
    Ha ha it does look like a hand crank lol
    It's actually a spring loaded selector pin to choose between metric and imperial threading
    During design I was running out of areas to mount the selector so I put it here

  6. #6
    jatt's Avatar
    jatt is offline Always within 10 paces from nearest stubby holder
    Join Date
    Aug 2008
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    51
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    760

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    Had a look at a couple of the U Tube vids.

    Cool
    Frisky wife, happy life. ​Then I woke up. Oh well it was fun while it lasted.
    From an early age my father taught me to wear welding gloves . "Its not to protect your hands son, its to put out the fire when u set yourself alight".

  7. #7
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    Hi Tommy,

    Very crafty ! I had visions of been able to quickly wind back the saddle via the leadscrew after threading.

    Thanks for the pictures and explanation.
    Best Regards:
    Baron J.

  8. #8
    Join Date
    Nov 2018
    Location
    Tasmania
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    Quote Originally Posted by BaronJ View Post
    Hi Tommy,

    Very crafty ! I had visions of been able to quickly wind back the saddle via the leadscrew after threading.

    Thanks for the pictures and explanation.
    Not going to lie you have gotten me thinking about this now, probably not a bad feature as I do need to nudge the gear train slightly when changing gears
    I'd also need to crate a clutch of some sort so I don't have a handle whipping around!

    Hmm more work

  9. #9
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
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    Hi Tommy,

    I own a Myford S7LB, and it can be a right royal pain fitting the winding handle down the spindle to wind back the saddle after threading, particularly for metric threads, and if I have the ER32 collet chuck and its drawbar fitted, I've seen me winding the chuck using the chuck key.

    I don't know if it helps, but I made a "Tumbler reversing mechanism" with centre neutral for a milling machine table drive. That could get you away from a spinning handle.

    Just to add clarity, I try to arrange things so that I'm threading away from the chuck if I can, particularly if I'm doing a blind internal thread.
    Best Regards:
    Baron J.

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