27 Speeds External Headstock Gearbox (Free Plans and More)

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Aug 24, 2018, 10:58 AM
LMMasterMariner

1 Attachment(s)

27 Speeds External Headstock Gearbox (Free Plans and More)

Free plans for much better gearbox (27 speeds) can be found at

https://www.youtube.com/watch?v=FCb502kzZZ8

Download in pdf format will be available here soon.

W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G /
=========================================================================== ============

ONE MISTAKE FOUND.

AND CORRECTED.

CHECK CORRECTIONS.pdf

DIDN'T HAVE THIS PROBLEM IN PREVIOUS VERSION (18 SPEEDS) AS THERE WERE 60 TEETH AND 64 TEETH GEARS IN THE SAME LINE
AND WITH COPY / PASTE USED IN DRAWINGS, WELL S...T HAPPENS.

Best regards
LMMasterMariner
Aug 24, 2018, 12:23 PM
LMMasterMariner

24 Attachment(s)

Plans

Here are the plans.
Aug 25, 2018, 12:48 PM
olderdan

Thank so much for sharing your many hours of hard work, I have saved your PDFs and even if I do not copy your design it is great start point for other projects.
Aug 27, 2018, 04:23 PM
bruce.desertrat

Thank you! This is a generous gift to the community.
Aug 27, 2018, 07:56 PM
Frank S

It took me a while to remember that your input shaft RPM is not constant Since I read your lowest ratio between shaft A and shaft D as 9 to 1 the only way I could see a 25 RPM output would have been if the input were 225 meaning there had to some additional reduction somewhere.
Is that correct?
Aug 27, 2018, 09:48 PM
LMMasterMariner

2 Attachment(s)

Quote:

Originally Posted by Frank S

It took me a while to remember that your input shaft RPM is not constant Since I read your lowest ratio between shaft A and shaft D as 9 to 1 the only way I could see a 25 RPM output would have been if the input were 225 meaning there had to some additional reduction somewhere.
Is that correct?

Yes, That's correct. There is 4:1 reduction from motor to idler pulley and gearbox input speed is constant. 293.43 RPM.
One picture from the first post 'lathe external headstock gearbox' and screenshot from excel file attached. It took me some time until I came to magic number 225.
Aug 27, 2018, 11:06 PM
Kimbatuk

Thank you so much for the plan. Just wondering if there was a 015.pdf file missing in the listing?
Aug 27, 2018, 11:57 PM
LMMasterMariner

2 Attachment(s)

Quote:

Originally Posted by Kimbatuk

Thank you so much for the plan. Just wondering if there was a 015.pdf file missing in the listing?

yes, there is 015.pdf, but it is totally useless. that's why it wasn't attached. no any dimensions in it.
but there are 2 better quality plans with mm paper. 022 and 023.
Aug 28, 2018, 06:21 AM
DIYer


Thanks LMMasterMariner! We've added your External Headstock Gearbox to our Lathes category,
as well as to your builder page: LMMasterMariner's Homemade Tools. Your receipt:

<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="http://www.homemadetools.net/homemade-external-headstock-gearbox"> <img src="/uploads/217320/homemade-external-headstock-gearbox.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="http://www.homemadetools.net/homemade-external-headstock-gearbox">External Headstock Gearbox</a> <span> by <a href="http://www.homemadetools.net/builder/LMMasterMariner">LMMasterMariner</a></span> </div> <div class="tags">tags: <a href='http://www.homemadetools.net/tag/gears'>gears</a> </div> </div> </div> </div>
Aug 28, 2018, 07:04 AM
kquiggle

Thanks for making your work available. Do you have any videos of the gearbox in action?
Aug 28, 2018, 09:27 AM
LMMasterMariner

1 Attachment(s)

W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G / W A R N I N G /
=========================================================================== ============

ONE MISTAKE FOUND.

AND CORRECTED.

CHECK CORRECTIONS.pdf

DIDN'T HAVE THIS PROBLEM IN PREVIOUS VERSION (18 SPEEDS) AS THERE WERE 60 TEETH AND 64 TEETH GEARS IN THE SAME LINE
AND WITH COPY / PASTE USED IN DRAWINGS, WELL S...T HAPPENS.
Aug 28, 2018, 09:32 AM
LMMasterMariner

Quote:

Originally Posted by kquiggle

Thanks for making your work available. Do you have any videos of the gearbox in action?

yes, check http://www.homemadetools.net/forum/h...-gearbox-67608
Aug 28, 2018, 10:57 AM
PJs

Thank You LMMasterMariner for sharing all of this with the community and throughout your journey. Most Impressive!! Quite the Amazing build and design journey you took to the finish line. Loved the video compilation and the music was perfect imho! Was that gear setting accordion, paper or metal...looked like metal reduced and formed??

Thank You again for sharing a masterful design and build!!

PJ
Aug 28, 2018, 11:15 AM
LMMasterMariner

Quote:

Originally Posted by PJs

Thank You LMMasterMariner for sharing all of this with the community and throughout your journey. Most Impressive!! Quite the Amazing build and design journey you took to the finish line. Loved the video compilation and the music was perfect imho! Was that gear setting accordion, paper or metal...looked like metal reduced and formed??

Thank You again for sharing a masterful design and build!!

PJ

gear setting accordion as you call it is just printout of the drawing in actual size 1:1 ratio and I actually used original gears to check if everything is fine. Gears were created by program GearDXF. Then opened by LibreCAD and rotated if required. (both freeware programs) Then copied to and completed in Paint and saved as 16 colour Bitmap image.
Aug 28, 2018, 02:09 PM
PJs

In the video between :55 and 1:00 is that a piece of paper to set the gear engagement or metal. Didn't use the right words sorry...maybe setting the lash?? I use paper on my Mini Lathe when changing gears or move the banjo.
Aug 28, 2018, 03:55 PM
LMMasterMariner

Quote:

Originally Posted by PJs

In the video between :55 and 1:00 is that a piece of paper to set the gear engagement or metal. Didn't use the right words sorry...maybe setting the lash?? I use paper on my Mini Lathe when changing gears or move the banjo.

Yes. That's piece of paper. The same thickness which I use when changing gears at banjo.
Sep 17, 2020, 08:37 PM
marksbug

awesome. now If I can just put synchronizers on it and put it in my car..... what a work out that would be shifting... keep up the great work!!!
Feb 9, 2024, 09:28 AM
mcgu0121

Hello all, new forum member here. I'm repowering my Logan lathe at the moment and was searching for a solution to having more than 3 speeds 😀.
Thank you so much for contributing to thw machiing community with your many published designs LMMasterMariner, however I seem to be unable to find a link for the attached files!
I have a paid membership, and I see the sentence "🖇 attached files" but no files, or hyperlink.

Are these plans still available?

Cheers! 🍺
Feb 9, 2024, 11:58 AM
Jon

mcgu0121 - if you're viewing the thread on a mobile device, try switching to a desktop or laptop. Or, email me at jon@homemadetools.net, and I'll send you all of the attached files via email.
Dec 25, 2024, 08:24 AM
nhengineer

Quote:

Originally Posted by LMMasterMariner

Free plans for much better gearbox (27 speeds) can be found at

https://www.youtube.com/watch?v=FCb502kzZZ8

Download in pdf format will be available here soon.

=================

How soon?