Chris' Build of a Lombard Hauler Engine

[crueby]

Kerrin - sounds like great fun!

Looking back at my picture of the bearing blocks, just realized that I did not finish shaping the tops of the caps, need to mill back the ends and round the middle section. First on the list for today!

[crueby]

Got the top caps of the bearing blocks shaped - took the sides down on the mill

and rounded the middle on the belt sander

[90LX_Notch]

Looking good Chris. 

-Bob

[crueby]

Thanks Bob!

I was corresponding with the folks up at the museum, and got pointed to one of the web site pages that I had missed before, showing the earlier restoration work on the hauler as a series of photos (click on the numbered captions down the side to view the photos). Very interesting stuff, turns out they cast new cylinders for the engine, and made up new roller chain, and got replacement drive chain from the original manufacturer. Very interesting sequence.

http://www.umit.maine.edu/~herbert.crosby/LOMBARD/frame.htm

The higher level of the web site is here:
http://www.umit.maine.edu/~herbert.crosby/lombard2/

[crueby]

On to the eccentric followers. I cut lengths of a 1/4" thick brass bar and milled the ends square and to length, and sketched out the shape on them to help keep things oriented during milling.

Then milled the outlines out on the bottom caps, a pair at a time (more than two at a time was too hard to align with each other)

The rounded portion in the center will be done last.
Also milled the top cap outlines,

including the angled section that comes in to the width of the arm

Here are the parts so far:

Next step will be to drill/tap the bolt holes to join the pairs, then can start on the center bores...

[zeeprogrammer]

What? That's it? That's all you got?

Your elves are slacking off. Aren't you feeding them?

I probably shouldn't have said that. You... ...like Kim will probably point out that you're least making parts. 

[90LX_Notch]

No, that was me and....

You know that you can set the mini lathe right on the dinner table Carl.

-Bob

[crueby]

What? That's it? That's all you got?

Your elves are slacking off. Aren't you feeding them?

I probably shouldn't have said that. You... ...like Kim will probably point out that you're least making parts. 

Some of the elves are on vacation.. 
Actually, lots of other stuff going on. This month also built a new rc minisubmarine, had rifle league, 2 pistol leagues, and 2 archery leagues, did some furniture refinishing, and did a bunch of vacation planning to get away from all this hard work! 

[crueby]

No, that was me and....

You know that you can set the mini lathe right on the dinner table Carl.

-Bob

Good point!!   

[Flyboy Jim]

What? That's it? That's all you got?

Your elves are slacking off. Aren't you feeding them?

I probably shouldn't have said that. You... ...like Kim will probably point out that you're least making parts. 

Zee.............at least Chris is making parts! 

Jim

[crueby]

What? That's it? That's all you got?

Your elves are slacking off. Aren't you feeding them?

I probably shouldn't have said that. You... ...like Kim will probably point out that you're least making parts. 

Zee.............at least Chris is making parts! 

Jim

I'm still envious of Zees big new shop!

[Flyboy Jim]

What? That's it? That's all you got?

Your elves are slacking off. Aren't you feeding them?

I probably shouldn't have said that. You... ...like Kim will probably point out that you're least making parts. 

Zee.............at least Chris is making parts! 

Jim

I'm still envious of Zees big new shop!

I'm going to be even more envious when I see that new lathe and mill sitting in it! (do we have an emoji for jealous?)

Jim

[kvom]

I won't be impressed until I see Zee's lathe and mill with some chips lying on them (and I don't mean potato chips).   

[crueby]

A bunch more done on the eccentric followers today. Started by drilling through the side tabs for the bolts - through the top section with clearance drill, and all the way through with tap drill.

With all the hols drilled and tapped, assembled the halves,

and centered them up in the 4 jaw chuck to bore the center holes. I used some bar stock during setup on each to bring the faces forward of the jaws, since I will also be thinning the parts after boring.

Once each part was centered up, a starter hole was drilled

followed by boring the center out to the size to match the slots in the cams, then the near side of the hole was taken out larger to match the lips on the cams.

After boring the first side, the face of the part was taken down (the bar stock was slightly thicker than the designed part). Then, the part was turned around in the chuck, checked for center, and the second side taken out to match the cam lip, and that face taken down like the first side was. Here is what the cross section looks like at this point:

The raised section in the center will ride in the slot in the cams. After a test fit,

then the side lobes were taken down to final width

and the upper ends notched for the arms to fit in flush.

Here are the parts so far, with the blanks for the arms cut to rough length, and one end had its corners rounded on the sander to fit snug into the slots in the top of the followers.

Next steps will be to make and silver solder on some blocks at the upper ends of the arms, to make the clevis at that end that goes around the Stephenson slide link. Once the arms are complete, they will be attached to the followers, probably silver soldered into the slots since there is no room for a through bolt, and 1/16" is a little thin for a screw to hold well enough. Don't think I have had occasion yet to silver solder brass to steel, but from what I've read that should work okay. I hope...

[b.lindsey]

More great looking parts Chris!! Been meaning to ask....is that live center Sherline or an alternate vendor and if so who's? I like the looks of it.

Bill