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

User Tag List

Results 1 to 4 of 4

Thread: Hobbing Worm Wheel - Need Help

  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

    Hobbing Worm Wheel - Need Help

    Need to know diameter of worm wheel for the following numbers of teeth: 30, 32, 36, 40
    for worm dia 24 mm x metric trapezoidal thread TR3

    Even have plenty round bars of phosphorus bronze in various diameters wouldn't like
    to use hit and miss approach.

    Many thanks in advance / Best regards
    LMMasterMariner

    186 More Best Homemade Tools eBook

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

    Seedtick (Sep 6, 2017)

  3. #2
    Supporting Member olderdan's Avatar
    Join Date
    Jun 2016
    Posts
    781
    Thanks
    1,456
    Thanked 1,531 Times in 463 Posts

    olderdan's Tools
    Quote Originally Posted by LMMasterMariner View Post
    Need to know diameter of worm wheel for the following numbers of teeth: 30, 32, 36, 40
    for worm dia 24 mm x metric trapezoidal thread TR3

    Even have plenty round bars of phosphorus bronze in various diameters wouldn't like
    to use hit and miss approach.

    Many thanks in advance / Best regards
    LMMasterMariner
    Found this in Engineers Handbook which may help.
    Hobbing Worm Wheel - Need Help-screen-shot-09-06-17-12.25-pm.png
    Not sure of your method of cutting these but if free hobbing you need to gash the teeth first.
    I think I would try a test on plastic or alloy to prove, good luck.

    2000 Tool Plans

  4. The Following 2 Users Say Thank You to olderdan For This Useful Post:

    LMMasterMariner (Sep 6, 2017), Seedtick (Sep 6, 2017)

  5. #3
    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
    Thanks Olderdan.

    I also found some info in 'Handbook of Machining and Metalworking Calculations' and 'Machinery's Handbook 29th Edition (2012)' which I have in my pdf collection.
    Yes, my intention is to use free hobbing method.
    Already made hob from s.s. 304 24 mm dia hex rod. At the same time on the same rod made worm.
    Here is picture of that and also picture (found on the web) of what hob should be when I finish it.

    Best regards
    LMMasterMariner
    Attached Thumbnails Attached Thumbnails Hobbing Worm Wheel - Need Help-1.jpg   Hobbing Worm Wheel - Need Help-2.jpg  
    Last edited by LMMasterMariner; Sep 6, 2017 at 07:09 AM.

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

    Seedtick (Sep 6, 2017)

  7. #4

    Join Date
    Nov 2015
    Location
    South Australia
    Posts
    1
    Thanks
    0
    Thanked 1 Time in 1 Post
    O/D=(n+2)Śmod



    186 More Best Homemade Tools eBook

  8. The Following User Says Thank You to viking For This Useful Post:

    LMMasterMariner (Oct 26, 2017)

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
  •