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  1. #16
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    Nov 2007
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    Thumbs up

    Thanks for that Keith. I'm interested because I remember doing a small
    amount of work on gears when doing tech. drawing at high School.

    I find that gear tooth profiles are not so readily understood. I just have an
    interest in these things, not that it is of much use to me. Might prove useful
    in a trivia contest!!

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  3. #17
    Join Date
    Oct 2008
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    Leopold, Victoria
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    Default

    A few interesting wooden gear tooth designs here Keith.

  4. #18
    Join Date
    Apr 2013
    Location
    Torquay
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    4,421

    Default

    Quote Originally Posted by Repliconics View Post
    Hey Keith I was just having a snoop around and found a ripper of a book.
    Life of Richard Trevithick with an account of his inventions, published in 1872.

    It's over eight hundred pages and can downloaded for free on Google Books.
    Thought it may be of some help.

    Trevor.
    Thanks mate that is great

    Keith

  5. #19
    Join Date
    May 2012
    Location
    Woodstock (Cowra)
    Age
    74
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    3,372

    Default

    Click on the link, buy the program, you will never be happier

    http://woodgears.ca/gear_cutting/template.html
    The person who never made a mistake never made anything

    Cheers
    Ray

  6. #20
    Join Date
    Apr 2013
    Location
    Torquay
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    4,421

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    Quote Originally Posted by rwbuild View Post
    Click on the link, buy the program, you will never be happier

    http://woodgears.ca/gear_cutting/template.html
    Thanks - it's great. Thanks for looking up all the info for me.

    Keith

  7. #21
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    Apr 2013
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    Torquay
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    Quote Originally Posted by Treecycle View Post
    A few interesting wooden gear tooth designs here Keith.
    Dallas

    Thanks - there are some pretty interesting looking gears here.

    Regards

    Keith

  8. #22
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    Apr 2013
    Location
    Torquay
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    Default

    Hi All,

    There was a fair bit of discussion about gear tooth profiles. Thanks to all those who researched and commented. I have made my first drive wheel gear. I have photographed the steps I used. They a fairly self explanatory. I cut the teeth using a coping saw and used needle fiIes to get a clean tooth profile. I turned the recess with the gear blank on a mandrel I made. This was done on my metal turning lathe. I cut the centre out using a coping saw. I filed around internally to make the lugs.
    I haven't drilled the bolt holes in the lugs yet. I will wait until I make a wheel and drill to fit. The last photo shows the gear on the scale sketch of one of the locomotive drive wheels. This is going to be a lengthy build.

    Keith
    Attached Images Attached Images

  9. #23
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    Nov 2007
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    76
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    Thumbs up

    Great work Keith!! Really informative photos too!!

  10. #24
    Join Date
    Jan 2014
    Location
    Washington State, USA
    Posts
    455

    Default

    Somewhere on that woodengears.ca site he has a great video on making wooden gears. He does it on a bandsaw, if you have one.

  11. #25
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    Apr 2013
    Location
    Torquay
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    Quote Originally Posted by PLD View Post
    Somewhere on that woodengears.ca site he has a great video on making wooden gears. He does it on a bandsaw, if you have one.
    Thanks,

    Yes I have a bandsaw with a wide blade which doesn't give me the control I want. I have a bandsaw with 300mm throat. I could look at a narrower blade (don't know if you can get them). Did a trial on scroll saw but didn't have a lot of control.

    Thanks for suggestion - will look at narrower blade.


    Regards

    Keith

  12. #26
    Join Date
    Nov 2007
    Location
    Dundowran Beach
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    76
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    Post

    II taught at a school with a principal whose father built a wooden geared clock.

    As he was an engineer he had plenty of access to the right equipment and made
    profiled router bits for cutting the teeth.

    The job was beautifully done.

  13. #27
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    Apr 2013
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    Torquay
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    4,421

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    Started work on the front drive wheel of the locomotive. Cut out using bandsaw. Glued my scale plan to it and drilled guide holes. Cut out using jigsaw. Filed (lots of filing). Last photo shows how the drive gear will sit. Still a fair bit of sanding, etc on this first wheel.

    Keith
    Attached Images Attached Images

  14. #28
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    Oct 2006
    Location
    Wodonga
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    53
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    712

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    Looking pretty damn good.

    You are setting a high standard so far, all very neat and accurate.

    This is one to watch.

    Steven.

  15. #29
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    Nov 2008
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    Canterbury UK
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    67
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    3,994

    Default

    Looks like you are getting off to a fantastic start that wheel really looks the part

  16. #30
    Join Date
    Apr 2013
    Location
    Torquay
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    4,421

    Default

    Hi all,

    Have now cut out and sanded the main idler gear blank. This is 250mm diameter on my model - original size - a large 1250mm diameter. The gear cutting is a tedious task. Using a coping saw. Filing with various files - 2nd cut to smooth. I have included sketch of loco for comparison.

    Keith
    Attached Images Attached Images

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