Yogi's take on a Duclos Gearless

[yogi]

The fiddly bits continue with the indexer.

Using a collet block to index the indexer... 

Material is 303 Stainless










Back on the lathe to part off



Action shot... 




Finished part

[Dave Otto]

Nicely done Yogi!

The Black oxide parts also turned out great; any plans to polish the rims on the flywheels?

Dave

[yogi]

Thanks Dave.The plan is to leave the flywheels black oxide. I'm not a big fan of polishing to a mirror finish. That's just my personal preference... (maybe I just haven't acquired the taste yet  )

[b.lindsey]

Yep, that indexer is one of the fiddly bits...a lot more work than the finished part exhibits...but well done in any case

Bill

[yogi]

Thanks Bill! 

The Toggle Bracket is the pivot for the latch of the governor, and also part that holds the push rod in place. I'm holding off with governor parts until after a successful test run.
I didn't have a better fitting piece of brass stock, so I had to machine quite a lot off...

[b.lindsey]

All these parts are so well finished yogi. Nicely done!!

Bill

[Roger B]

That's some fine work on some fiddly little bits   

[Doc]

Just catching up on some of the builds going on and I spotted this thread. I was thinking of building that engine so here I am following along. And may I say your work looks outstanding to say the least! You take some really nice pictures something that I just can't seem to come close.

 I like your CNC I ran that same counsel on a Maho tool room machine has a great machine I had a chance to buy it when the company sold it for I think $7000 I kick myself for not buying it.
 Anyway I'll be here watching keep up the nice work!

[fumopuc]

Hi Yogi, I am still following along. Thanks for showing all this fiddly little bits making.

[yogi]

Thanks for the kind comments guys! 

Today's installment is the cast iron piston and the tapered bushings to mount the flywheels. The rather large ring groove in the piston is for a O-ring.

We are getting close to start assembly...

[yogi]

OK, it's time for some sub-assemblies.

The crankshaft is nothing new, just with the piston installed. I just thought I show it one more time. It's not gonna be very visible, once it gets installed on the engine... 




Assembled pushrod




Assembled valve bodies

[zeeprogrammer]

It takes more than CNC and good equipment...the skill is showing.
Nice!

[b.lindsey]

Good stuff yogi....keep it coming. I really like the contrast of the brass with the black oxide too!!

Bill

[Hugh Currin]

Yogi:

Very nice pictures and wonderful parts. I also like the brass and black oxide contrast.

In cutting the indexer there are a couple of arcs. How did you cut these, are they profiles or? They seem very smooth even when in the vice so likely not file work. Inquiring minds...

Thanks.

Hugh

[yogi]

Thanks for the compliments guys!   

Hugh, yes, the radii are milled using a 1/8 diameter endmill with a small corner radius, in a surfacing operation. Because they area to be milled is so small, I used a very small step over, and it didn't need any finishing work afterwards. I was contemplating on just filing the radii when I started with the indexer, but then went for the milling ops. I'm glad I did, as it turned out nice...