Author Topic: Ohio Locomotive Crane  (Read 64442 times)

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #870 on: February 03, 2025, 04:40:00 PM »
Got the crosshead guide rails bolted down on the floor plates:

Then moved on to making the crossheads themselves. They need bronze bearings where they slide on the rails, the bearings wrapping around the tops of the rails to lock them from moving up/down and side/side. What I decided to do was make the bearings in two halves that will bolt onto a steel vertical piece that will hold the wrist pin from the conrod, and another hole at the end to take the piston rod end. Started with the bronze pieces, milled down from more of that cored bronze slice. Here they are after shaping, drilling/tapping:


Next I'll start shaping the steel upper pieces...

Offline cnr6400

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Re: Ohio Locomotive Crane
« Reply #871 on: February 03, 2025, 05:32:55 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn:
"I've cut that stock three times, and it's still too short!"

Offline Michael S.

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Re: Ohio Locomotive Crane
« Reply #872 on: February 03, 2025, 07:52:44 PM »
Interesting progress.
Just two cylinders and control slides!


Michael

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #873 on: February 03, 2025, 08:48:19 PM »
Interesting progress.
Just two cylinders and control slides!


Michael
That's  right, one engine and 7 or 8 clutches (depending if there are one or two winding drums)

Offline PaulR

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Re: Ohio Locomotive Crane
« Reply #874 on: February 03, 2025, 09:31:46 PM »
Those slides look great, look forward to seeing them in action especially if there's a liberal amount of oil swishing back and forth!

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #875 on: February 03, 2025, 10:31:25 PM »
Those slides look great, look forward to seeing them in action especially if there's a liberal amount of oil swishing back and forth!
With the smooth stainless and bearing bronze it shouldn't  need that much oil, unless a drunk shop elf falls asleep with the oil can!   :Lol:

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #876 on: February 04, 2025, 02:57:54 PM »
I heard some chewing noises this morning before heading into the shop. Turns out that the shop elves pet metal-eating goat, named 'Mill-y', had been looking at the plans and chewed out the center pieces of the crossheads for me!   :Lol:

Then I turned up the wrist pins from some hex stock, with a threaded section from a 4-40 screw tapped into the end:

All goes round as intended!   :whoohoo:   The outer end, on the left in the photo, is left unfinished for now. I will come back to drilling the hole and turning the end for the piston rod later on after the cylinders/pistons are made, so I can adjust the height if need be. Unlike a lot of engines, the crank, crosshead, and cylinders are all seperately bolted down on the floor plate rather than in one engine bed piece.

So, on to the cylinders! They will be pieced up with the cylinder core, steam chest, and base plate made seperate and silver soldered together then the final boring and flange turning done. Starting with the cylinders, I've cut a couple lengths of 1-5/8" bar stock. They are over long for now to give room to chuck them up to turn the profile, start the bore, and mill flats for the steam chest and base. The excess length will be trimmed off later, and will leave stock to make the end caps from.


Offline Kim

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Re: Ohio Locomotive Crane
« Reply #877 on: February 04, 2025, 04:10:17 PM »
Nice looking crossheads!  :ThumbsUp: :popcorn:

That Mill-y the shop elf goat is pretty accurate with the metal munching!

Kim

Offline bent

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Re: Ohio Locomotive Crane
« Reply #878 on: February 04, 2025, 07:40:39 PM »
"BTW I think it may be illegal to use the legal pads here for anything that isn't pushing the limits or is outright bent (you know, lawyer stuff)"

I might be bent, but not that kind of bent.  :Lol:

Still moving right along, and I too would like one of those CN* goat mills. 

*CN = Can Nutrition

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #879 on: February 04, 2025, 09:09:19 PM »
"BTW I think it may be illegal to use the legal pads here for anything that isn't pushing the limits or is outright bent (you know, lawyer stuff)"

I might be bent, but not that kind of bent.  :Lol:

Still moving right along, and I too would like one of those CN* goat mills. 

*CN = Can Nutrition
:Lol:   I'd  rather  clean up after a mill than the goat though...   :o

Offline cnr6400

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Re: Ohio Locomotive Crane
« Reply #880 on: February 04, 2025, 09:22:18 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Could be a case of "eat steel, sheet metal"  :facepalm: :facepalm2:  :Lol:

Great progress by Mill-y and yourself on the crossheads. They don't even look perturbed, let alone cross.... :Lol:
"I've cut that stock three times, and it's still too short!"

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #881 on: February 04, 2025, 10:14:07 PM »
:ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Could be a case of "eat steel, sheet metal"  :facepalm: :facepalm2: :Lol:

Great progress by Mill-y and yourself on the crossheads. They don't even look perturbed, let alone cross.... :Lol:


 :facepalm2:

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #882 on: February 05, 2025, 03:00:43 PM »
A whole bunch done on the cylinder assemblies. Started with boring the blanks out to remove the bulk of the bore so less mass to heat up during soldering, but stopped short of the final diameter. I'll get them silver soldered up with the base and steam chest base pieces, then finish boring. You can just see a shallow recess around the bore - that is about where the final bore will be, I put that in as a reference for the steps over on the mill, when cutting the flats in to the sides, to ensure that I dont cut them too deep and break through into the future bore.


Also turned the outside to size with the end flanges and center diameter. A piece of round bar with a hole in the center (its the cap from one of the arbors made for gear cutting) was held on the end with the live center to help support the piece.


Then moved the chuck and cylinder over to the vertical rotary table on the mill to cut in the flat for the steam chest base to sit on.

as well as a shallower one for the base plates that will bolt the cylinder to the floor. Since there is a right and left cylinder, with the steam chests on opposite sides, this second flat was made with the cylinder turned 90 degrees one way on the first one, and the other way on the second one.

The two cylinders so far...

Then cut and trimmed stacks of pieces for the steam chest bases, steam chests, chest lids, and the base plates.


Next time I'll get some small brass screws to hold things together for silver soldering. The actual soldering may be delayed, we are in a cold stretch here, and its not a lot of fun being outside in sub-freezing weather doing the torch work. So, I may switch back to cutting the gears while waiting for the next warmer day - around here we tend to get cold/warm cycles in the winter every week or so.

 :cheers:

Offline cnr6400

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Re: Ohio Locomotive Crane
« Reply #883 on: February 05, 2025, 04:52:59 PM »
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Cylinder parts look great! Major progress. May have helped a lot that you didn't let the shop elf manager Syl Linder out of the paint closet!  :Lol:
"I've cut that stock three times, and it's still too short!"

Offline crueby

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Re: Ohio Locomotive Crane
« Reply #884 on: February 05, 2025, 07:38:28 PM »
:ThumbsUp: :ThumbsUp: :ThumbsUp: :popcorn: :popcorn: :popcorn: Cylinder parts look great! Major progress. May have helped a lot that you didn't let the shop elf manager Syl Linder out of the paint closet!  :Lol:
Syl Linder was sent off you your house last week to check on the paperwork you forgot to file...   :LittleDevil:

 

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