Elmer's 25 by AOG

[AOG]

It's been a while since I have built anything and now it's time. I have built multiple mechanics kits and machined a few wobblers and one of the elderberry engines. Since I'm rusty I figured I would start with the classic Elmer's 25. This will be my first build log as well as my first attempt to use Tapatalk to post. So let's begin.



Base and frame cut out.



Marked out



Using my laser to center on the marked out holes



Drilling the radius on the frame



Sawing and filing to shape on my die filer

[AOG]

It looks like I double posted the first picture. The second picture should be



AOG

[AOG]

Ok here's part 2



Drilling the holes



Drilling for the base



Then I made the alignment pin for the port jig and the port jig.



Transfer punching the port holes onto the frame. I actually made a mistake here and marked the ports on the wrong side. Thankfully I noticed it before I drilled the intake port.



Picking up my marks with the laser prior to drilling. The drilling picture didn't come out so I'm not including it.



Turning the crank disk



Reaming the crank disk after drilling.



After parting off I screwed the disk down to my sacrificial plate and milled the crank



After some filing I pressed the crank shaft and pin into the crank. Next time I will start the cylinder.

[Marinus]

That looks great AOG. Can't wait for the next update

[b.lindsey]

Nice start on the #25 Anthony. Tapatalk seems to work well so far too.

Bill

[AOG]

Tapatalk seems to work well so far too.

I decided to try Tapatalk because of their integrated image hosting.  I don't like the look of uploaded images and the whole photobucket thing seams like a pain. The only downside is that after a limited number of uploads you have to pay to upgrade the photo storage. It's only a couple of bucks so I figured I would try it. So far so good.

Tony

[Alan Haisley]

Nice start, Tony. Waiting with    for the next episode.

Alan

[arnoldb]

Good going Tony 

The #25 is a fun engine to build!

Kind regards, Arnold

[AOG]

Part 3
I have to say this was not a very good shop session.  It started off well enough. I decided I would make the cylinder.



Squareing up the blank



Blank centered up in the four jaw and being faced.



Offset put in and drilling the piece. And then



Disaster
Behold the results of the failure to properly count turns. We have breakthrough.  After stretching the bounds of the English language and a long break I remade the part.



Reaming the bore



Turning the bottom of the cylinder. By this time I had had enough of mister four jaw and decided to complete the other operations on the mill.



This is a picture of the blank after turning. You will notice the scrape marks on the sides. This is from a certain idiot failing to protect the part in the four jaw chuck and then sliding it all around to set up for an offset turn. Thankfully it's nothing taking a few thousands off can't fix. Anyway on with the build.



Finding the edge of the part.



Putting in the recess with an end mill



Drilling the pivot hole. I used the technique that I read from arnoldb's build of turning up an aluminum rod that fits in the bore and then drilling down into it to prevent deforming the edge of the hole. I will use the tool again when I solder the pin. I will end with a family shot (including fixtures and tools)

[Roger B]

looking good    it's not an engine that I know (but there again I don't know many), do you have a picture/GA of it?

[AOG]

looking good    it's not an engine that I know (but there again I don't know many), do you have a picture/GA of it?

Here is a video from arnoldb's build of the 25:

<a href="https://www.youtube.com/watch?v=sNlhquZCAWk" target="_blank">http://www.youtube.com/watch?v=sNlhquZCAWk</a>

Tony

[b.lindsey]

You are coming along well Tony, looks like just a few more parts to go now.

Bill

[Roger B]

Indeed it's a neat looking little engine   

[AOG]

Part 4
I didn't have to work this weekend so I decided to get some shop time in. I started with making the piston rod



Piston rod turned and threaded



Over to the mill and into my new ER 32 collet block to mill the flats



Cutting the piston rod from the parent stock on my die filer with the hack saw blade and over arm.



Piston turned and cutting the oil grooves.



After drilling the center hole I tried to part it off. Unfortunately I can't part brass to save my life so it came off with the hacksaw



Over to the tapping stand to tap a 5-40 thread



With the piston done it was time to use it in the jig in order to transfer punch the location for the cylinder port



Drilling the port. Now it's time to make the hose fitting



Drilling the hose fitting after turning to size

That's it for this weekend. The next step is to lap the frame and the cylinder and get ready to solder in the pivot pin. I also need to find something to make the flywheel from. I will leave you with a family picture.

[b.lindsey]

Thanks for the update Anthony, you made some good progress today.

Bill