Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Page 1 of 2 1 2 LastLast
Results 1 to 10 of 19

Thread: 27 Speeds External Headstock Gearbox (Free Plans and More)

  1. #1
    Supporting Member LMMasterMariner's Avatar
    Join Date
    Jan 2016
    Location
    Dubrovnik - Croatia
    Posts
    233
    Thanks
    586
    Thanked 568 Times in 131 Posts

    LMMasterMariner's Tools

    27 Speeds External Headstock Gearbox (Free Plans and More)

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



    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
    Attached Files Attached Files

    186 More Best Homemade Tools eBook
    Last edited by LMMasterMariner; Aug 28, 2018 at 09:24 AM. Reason: Error

  2. The Following 21 Users Say Thank You to LMMasterMariner For This Useful Post:

    allenz (Feb 24, 2022), almarghi (Aug 27, 2018), bruce.desertrat (Aug 27, 2018), darkoford (Dec 18, 2018), DIYer (Aug 28, 2018), Frank S (Aug 24, 2018), G.Paul (Dec 18, 2018), HobieDave (Mar 19, 2020), Jon (Aug 24, 2018), Kevic (Aug 27, 2018), KickStart (Aug 28, 2018), Kimbatuk (Aug 27, 2018), marksbug (Sep 17, 2020), Miloslav (Dec 17, 2018), NortonDommi (Dec 18, 2018), philipUsesWood&Brass (Aug 27, 2018), PJs (Aug 28, 2018), rossbotics (Aug 25, 2018), Saltfever (Oct 3, 2020), Seedtick (Aug 27, 2018), Tule (Aug 28, 2018)

  3. #2
    Supporting Member LMMasterMariner's Avatar
    Join Date
    Jan 2016
    Location
    Dubrovnik - Croatia
    Posts
    233
    Thanks
    586
    Thanked 568 Times in 131 Posts

    LMMasterMariner's Tools

    Plans

    Here are the plans.
    Attached Files Attached Files

    2000 Tool Plans

  4. The Following 15 Users Say Thank You to LMMasterMariner For This Useful Post:

    almarghi (Aug 27, 2018), Altair (Mar 17, 2020), DIYer (Aug 28, 2018), Floradawg (Aug 27, 2018), Frank S (Aug 24, 2018), Karl_H (Aug 28, 2018), Kimbatuk (Aug 27, 2018), Miloslav (Dec 17, 2018), NortonDommi (Dec 18, 2018), olderdan (Aug 25, 2018), PJs (Aug 28, 2018), rossbotics (Aug 25, 2018), Seedtick (Aug 27, 2018), sossol (Aug 27, 2018), Tule (Aug 28, 2018)

  5. #3
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools
    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.

  6. #4
    Supporting Member bruce.desertrat's Avatar
    Join Date
    Nov 2017
    Posts
    782
    Thanks
    553
    Thanked 665 Times in 357 Posts

    bruce.desertrat's Tools
    Thank you! This is a generous gift to the community.

  7. #5
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    11,172
    Thanks
    1,970
    Thanked 8,760 Times in 4,192 Posts

    Frank S's Tools
    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?
    Never try to tell me it can't be done
    When I have to paint I use KBS products

  8. #6
    Supporting Member LMMasterMariner's Avatar
    Join Date
    Jan 2016
    Location
    Dubrovnik - Croatia
    Posts
    233
    Thanks
    586
    Thanked 568 Times in 131 Posts

    LMMasterMariner's Tools
    Quote Originally Posted by Frank S View Post
    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.
    Attached Thumbnails Attached Thumbnails 27 Speeds External Headstock Gearbox (Free Plans and More)-097a.jpg   27 Speeds External Headstock Gearbox (Free Plans and More)-screenshot-2.jpg  

  9. The Following 2 Users Say Thank You to LMMasterMariner For This Useful Post:

    Frank S (Aug 27, 2018), PJs (Aug 28, 2018)

  10. #7

    Join Date
    Jun 2016
    Posts
    1
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Thank you so much for the plan. Just wondering if there was a 015.pdf file missing in the listing?

  11. #8
    Supporting Member LMMasterMariner's Avatar
    Join Date
    Jan 2016
    Location
    Dubrovnik - Croatia
    Posts
    233
    Thanks
    586
    Thanked 568 Times in 131 Posts

    LMMasterMariner's Tools
    Quote Originally Posted by Kimbatuk View Post
    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.
    Attached Files Attached Files
    Last edited by LMMasterMariner; Aug 28, 2018 at 02:29 AM.

  12. The Following User Says Thank You to LMMasterMariner For This Useful Post:

    PJs (Aug 28, 2018)

  13. #9
    Content Editor
    Supporting Member
    DIYer's Avatar
    Join Date
    Aug 2013
    Posts
    3,057
    Thanks
    771
    Thanked 1,850 Times in 1,652 Posts


    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:




  14. The Following User Says Thank You to DIYer For This Useful Post:

    LMMasterMariner (Aug 28, 2018)

  15. #10
    kquiggle's Avatar
    Join Date
    Jan 2016
    Location
    Southwest Michigan
    Posts
    10
    Thanks
    0
    Thanked 17 Times in 7 Posts

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

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •