Chris's Build of a Stanley 735 Engine

[10KPete]

Between you and George you two cut plenty of gears and good at it......



 
Don

AMEN to that!

Pete

[Zephyrin]

Do you can cut the teeth of this wheel in module1 with a single pass with your Sherline?
I am very impressed by this mini machine tool, not to mention the impressive skill of the operator.

[crueby]

Thanks guys! Its fun to think back to my first clock project and how long it took me to cut the first gears, and how easy it seems now. As I like to say, Perctise Makes Prefect... Something like that! 




Zephryin, the brass gears cut through in one pass very easily and cleanly, especially with 360 or 353 brass. I would think steel would take multiple passes. Bevel gears take 3, just due to the shapes in any material. These days I usually use commercial gear cutters, cheap from places like CTC Tools. Clock gears are a different pattern and for those I'll make a single tooth cutter.

[crueby]

And no, I have not been ignoring this project the last few days, been working out the eccentric arrangement on the crankshaft, and how I want to make them. More soon!   

[crueby]

Okay, things sorted out on the eccentrics and back at it. Rather than keep re-offsetting the parts in the 4-jaw for each cam, I made one arbor with an offset post on the back and a nub on the front the size of the crankshaft, plus an alignment pin. Chucked that up, and could swap the eccentric blanks in and out and get the same offsets on everything. Here am cuting the first cam on a blank:

Then flipped the part around and cut the other side of it.  One side of each part is thicker, to reach past the rim of the gear.


Used the same arbor to cut the slot for the key:


Here are the parts held up against the gear:

Next I think I'll make the crankshaft itself - its a simple cylinder with a key down its length.

[tghs]

the more I watch the more I learn,, perfect timing for me right about now..

[crueby]

the more I watch the more I learn,, perfect timing for me right about now..

So you are building a Stanley engine too?   

Glad its of help - I learned (and continue to learn) a lot on this forum too!   

[crueby]

Turned a piece of 1/2" stainless rod down to size for the crankshaft...

and milled a slot for the key to keep the parts aligned...

I do not have any stock the right size for the key itself, to I sawed a wider piece close to size:

I'll silver solder that in place, then mill off the top of the key down to fit the slot heights.

[tghs]

looking through some of the old collection of steamboats and steam launches was an article were a stanley engine unit was mounted in a hull,, right-angle gearboxes on each shaft end coupled to the prop shafts for twin counter rotating props,, 

[crueby]

looking through some of the old collection of steamboats and steam launches was an article were a stanley engine unit was mounted in a hull,, right-angle gearboxes on each shaft end coupled to the prop shafts for twin counter rotating props,,

Cool!  Never seen a twin-screw steam launch, must have been a quick one.

[sid pileski]

Chris- here is a new project that I got from a friend of mine.
Wants me to make a nice stand for it. He thinks it is from a Locomobile?
What do you all think?
I find the ball bearing in the cross head interesting. Never seen that before.

Sid

[crueby]

That's very interesting! Nice engine, that ball setup is quite different. I don't know what brand it is, perhaps one of the others here does. Its in great condition.

[sid pileski]

Agreed.
Someone did a nice job cleaning it up. It runs fine.
I'm a little puzzled with the size of the sprocket on it. Seems like every engine I see on line has a much smaller sprocket.

Sid

[crueby]

Got the key soldered into the shaft yesterday, this morning milled the top edge down to size and got the gear/eccentric fitted on (filed the rounded ends of the slots square).

Nice tight fits, good to move on to the crank ends which also hold the bearings. These center parts will get a little blue loctite if needed to hold them from sliding though the crank ends may keep them in place. Here are the parts set in place in the engine...

[Don1966]

Looks great Chris you moving along at a fast rate.....


Don