Author Topic: Hornsb-Akroyd Crawler Tractor build  (Read 6496 times)

Online crueby

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #150 on: March 05, 2017, 08:34:46 PM »
Slick diagram - have to study that one some more...

Online GailinNM

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #151 on: March 08, 2017, 04:55:33 AM »
Got tlhe 13 tooth mating bevel pinions done.  I needed 4 but while I was set up for the 26 tooth gear I finished up the 4 extra blanks with the oversize bore in them. So I made an extra 4 pinions to match them. The extras will go into the "future projects"  bin. The bevel gears run smoothly in a temporary lash up for testing.

That is the last of the gears that go in the chassis portion.  There will be more gears to cut for the two gearboxes but those will all go on to the power unit that bolts on to the chassis.  That will let me work on the engine and gearboxes separate from the chassis and bolt them to each other after all the fittin filing and fussing are done. But for now it is back to the chassis unit.  Next up will be the jockey brackets hat hold the bevel gear pairs.
Gail in NM



I would like to be the kind of person my dog thinks I am.

Online crueby

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #152 on: March 08, 2017, 05:04:52 AM »
Those look great!


 :popcorn:

Offline Dan Rowe

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #153 on: March 08, 2017, 02:20:35 PM »
Nice gears Gail.

Chris the diagram I use for all bevel gears starts the same way draw a rectangle using the number of teeth for the sides. The diagonals are the pitch line. This works for both parallel depth and true bevel gears.

Dan
ShaylocoDan

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #154 on: March 08, 2017, 02:29:04 PM »
Nice gears Gail.

Chris the diagram I use for all bevel gears starts the same way draw a rectangle using the number of teeth for the sides. The diagonals are the pitch line. This works for both parallel depth and true bevel gears.

Dan

Looks like a great way to do it. The main thing I was struggling with was finding the proper face width on the teeth.
Also, what about the calculations for the 2nd/3rd cut on a parallel depth gear? How do you do that?

Offline Dan Rowe

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #155 on: March 08, 2017, 02:38:57 PM »
Chris,
I use a book called "Gear Design Simplified", it has the formulas I use. It also stated that the face length should not be longer than 1/3 of the theoretical pitch cone. That is a modern rule and does not apply to historic gears like Shay gears.

Dan
ShaylocoDan

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #156 on: March 08, 2017, 03:19:28 PM »
Chris,
I use a book called "Gear Design Simplified", it has the formulas I use. It also stated that the face length should not be longer than 1/3 of the theoretical pitch cone. That is a modern rule and does not apply to historic gears like Shay gears.

Dan
Thanks, I will look that one up.

Online crueby

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #157 on: March 20, 2017, 10:22:50 PM »
Chris,
I use a book called "Gear Design Simplified", it has the formulas I use. It also stated that the face length should not be longer than 1/3 of the theoretical pitch cone. That is a modern rule and does not apply to historic gears like Shay gears.

Dan
Thanks, I will look that one up.
My copy just arrived, looks lkke just the reference book I was looking for. Thanks!

Offline Don1966

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Re: Hornsb-Akroyd Crawler Tractor build
« Reply #158 on: March 28, 2017, 04:29:43 PM »
Chris,
I use a book called "Gear Design Simplified", it has the formulas I use.
Thanks, I will look that one up.
My copy just arrived, looks lkke just the reference book I was looking for. Thanks!
Chris that's the book I use to make the Gear spreadsheets that I posted in plans and drawings and very good book.

Gail outstanding work bud and your and inspiration to follow..... :praise2:

Don