More tiny work

[gbritnell]

I didn't put this under winter projects because hopefully it will be done long before the worst of winter hits.
First pictures are my large traction engine. This is the Cole's 1 inch Case 65 h.p. engine.

[gbritnell]

The second set of pictures are of my tiny Case engine. This was built for one of the early Sherline contests.

[gbritnell]

The third set of pictures are of my 1 inch Case hay baler.

[gbritnell]

 Ok maybe you see a trend developing here. Large, small, large and small, or in this case tiny. I had wanted to build the same attachments for the small Case as I did for the large one but other projects got in the way.

 While trying to come up with an all winter project I needed something to keep myself busy so I started on this tiny baler.

 I used to get some very small brass rod and angle stock from a supplier that's no longer in business so I have had to cut all the brass angle from solid stock. I milled the step and then cut the stock from the bar with a slitting saw. The main rails are .071 x .071 wide. I have had to really think ahead on this model as it has to be soldered together so one piece builds on another and hopefully I won't build myself into a corner.

 The rods that hold the main gear frames together are .020 brass. The spokes for the wheels will also be this size. The gears on the 1 inch baler are 24 and 32 pitch. The large bull gears and the main reduction gear all have 72 teeth so taking my scale factor, all the 1 inch dimensions are multiplied by .285, and reducing the gears but still keeping the same tooth count gave me pitches of 84.27 and 112.28. I used 14.5 degrees for the pitch angle and ground up a lathe bit to make my hob-like cutters. The gears and pinions were cut with the same cutters c

 The gears and pinions were cut with the same cutters even though the tooth count on the pinions was 12 and 15 teeth. I guess in these tiny sizes the involute curve doesn't amount to much. The fit-up on the gears came out surprisingly well. After making sure the gears meshed well I made up a fixture plate for the rotary table and cut the spokes on the flywheel and intermediate gear.

 I had posted an inquiry about obtaining more .8mm screws but haven't had much luck so I'll just use up what I have left.

gbritnell

[10KPete]

Geez, George, when are you going to start building wrist watches????? That's beautiful!!!

Pete

[gbritnell]

Just a short video clip to show the gear train in motion.
<a href="https://www.youtube.com/watch?v=IG84UVeJNKY" target="_blank">http://www.youtube.com/watch?v=IG84UVeJNKY</a>

[90LX_Notch]

I always am in awe of your work George.  I am so happy that I got to see some of it at Cabin Fever 2015.

-Bob

[Brian Rupnow]

George--when I grow up, I want to be as good a machinist as you are.---Brian

[gbritnell]

Hi Brian,
You're not so bad yourself. I follow along on all your builds.
gbritnell

[gerritv]

An inspiring build to watch.

http://www.microscrews-shop.nl/c-3465428/modelbouw-bouten-messing-hoog/ has .8mm bolts in brass (messing=brass). Owner speaks/writes very well in English. His drill bits are excellent as well. He might be able to source other materials, just ask.
I can translate in the unlikely event that comms becomes a problem.

Gerrit

[PJPickard]

George,

All are fabulous but I really love that little Case tractor!

[ShopShoe]

Amazing. Can't think of anything else to say.

Oh yeah..... You obviously like Case. Have you ever thought of modeling one of the early IC "crossmotor" tractors?

ShopShoe

[crueby]

Holy swarf! I was looking at the tiny Case model, took a bit to notice the dime in the photo. WOW!

[b.lindsey]

I want the name of your eye doctor George  .  Beautiful as always. Will certainly be following along.

Bill

[mklotz]

I want the bane if your eye doctor George

Proofreading is a virtue!  Took me a while to puzzle that one out.