CNW J class Mikado

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PeterCraymer
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Re: CNW J class Mikado

Post by PeterCraymer » Thu Jan 07, 2016 5:25 pm

Tim,

Great info! Thanks a lot. Ouch on the mold printing. I figured it wasn't cheap but $4k?!! Wow!

This may just be the ticket. I am assuming that as written on the pattern, they just made up all the molds and did a single melt/pour on all 8 pieces?

Peter

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Thu Jan 07, 2016 6:01 pm

The foundry pours a lot of different metals. They wait until they have a number of items to pore to make it more cost effective.

They should be poring a test cylinder this week. if it works this time they will pore 3 more.

Tim

Tim
PeterCraymer wrote:Tim,

Great info! Thanks a lot. Ouch on the mold printing. I figured it wasn't cheap but $4k?!! Wow!

This may just be the ticket. I am assuming that as written on the pattern, they just made up all the molds and did a single melt/pour on all 8 pieces?

Peter
He who dies with the most unfinished projects: Should of put more time into their hobby.

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PeterCraymer
Posts: 165
Joined: Thu Oct 02, 2003 6:57 am
Location: Maysville, Ga.

Re: CNW J class Mikado

Post by PeterCraymer » Fri Jan 08, 2016 3:48 pm

Tim,

Thanks for answering all these questions.
Did you use cast iron or grey iron for the wheels?
You mentioned .100" for shrinkage. Was that for diameter only?
What did you do for the thickness?

Thanks,
Peter

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Fri Jan 08, 2016 5:37 pm

Hi Peter

I drew the wheels full size to the drawing, adding 1 inch to the surfaces that would be machined and making sure I had the correct draft. Then I scaled the drawing, in my case multiply by 0.133333 for 1.6" scale. Then multiply by 1.00833 for the shrinkage. The casting came out right on size leaving me just over 1/8" for machining.

Tim
He who dies with the most unfinished projects: Should of put more time into their hobby.

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Sun Jan 10, 2016 12:30 pm

When I was at the foundry picking up my drivers I was able to take a picture of the mold with cores installed.
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Cylinder-Mold-and-Cores.jpg
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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Sun Jan 10, 2016 12:32 pm

I was able to do a little foundry myself. Here is a picture of the main frame cross tie.

Tim
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Main Fram Cross tie.JPG
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PeterCraymer
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Re: CNW J class Mikado

Post by PeterCraymer » Tue Jan 12, 2016 11:00 am

Tim,

Thanks for the details. looks great! I have found someone who may be able to locally print the patterns for me! I just need to get started! I will be following your progress with great interest!

Thanks,

Peter

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Sat Apr 16, 2016 1:45 pm

Hi All

Work on the locomotive has been slow, but I have been able to cast the Equalizer Fulcrum and Brake Hangers. Now to get them mounted on the frames.

Tim
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Equalizer Fulcrum Brake Hangers.JPG
He who dies with the most unfinished projects: Should of put more time into their hobby.

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Sun Jun 05, 2016 6:29 pm

Slowly getting the frames machined. Working on the frame extension pockets.

Tim
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Milling-Pocket.jpg
Milled-Pocket.jpg
He who dies with the most unfinished projects: Should of put more time into their hobby.

Asteamhead
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Re: CNW J class Mikado

Post by Asteamhead » Mon Jun 06, 2016 4:24 pm

FLtenwheeler,
Those castings of the hangers and brackets you made are looking great!! :D
Patterns (cylinders) which are containing cores I didn't make myself yet due to their complexity ...
Please continue reporting your progress, thanks!
Asteamhead

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Wed Jun 22, 2016 3:14 pm

I have machined the two cross ties that I have cast. I will be poring one more cross tie this weekend. So I am slowly moving forward with the project.

Tim
Attachments
P6190925.JPG
P6190930.JPG
P6190935.JPG
He who dies with the most unfinished projects: Should of put more time into their hobby.

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FLtenwheeler
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Re: CNW J class Mikado

Post by FLtenwheeler » Wed Jun 22, 2016 6:39 pm

I have 2 of the Driver Box Cellars installed. I will be casting this weekend.

Tim
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P6220944.JPG
He who dies with the most unfinished projects: Should of put more time into their hobby.

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