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2nd April 2014, 09:34 AM #16Skwair2rownd
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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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2nd April 2014, 01:15 PM #17
A few interesting wooden gear tooth designs here Keith.
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2nd April 2014, 05:30 PM #18GOLD MEMBER
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2nd April 2014, 11:02 PM #19
Click on the link, buy the program, you will never be happier
http://woodgears.ca/gear_cutting/template.htmlThe person who never made a mistake never made anything
Cheers
Ray
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3rd April 2014, 07:53 AM #20GOLD MEMBER
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3rd April 2014, 07:59 AM #21GOLD MEMBER
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4th April 2014, 03:26 PM #22GOLD MEMBER
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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
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4th April 2014, 06:10 PM #23Skwair2rownd
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Great work Keith!! Really informative photos too!!
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5th April 2014, 02:19 AM #24
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.
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5th April 2014, 09:10 AM #25GOLD MEMBER
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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
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5th April 2014, 01:17 PM #26Skwair2rownd
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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.
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5th April 2014, 05:19 PM #27GOLD MEMBER
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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
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5th April 2014, 07:39 PM #28
Looking pretty damn good.
You are setting a high standard so far, all very neat and accurate.
This is one to watch.
Steven.
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6th April 2014, 05:32 AM #29
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7th April 2014, 07:02 PM #30GOLD MEMBER
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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