Railroad Warehouse 2.8.2 Mikado Logger Build

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Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Are you thinking of overheating the valve packing?
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

NP317 wrote: Tue Dec 06, 2022 12:49 am Looks nicely familiar. Should function as desired.
Well done. Feels good to get those tasks accomplished. :lol:
RussN
Yep, every little thing that gets done brings me closer to completion. Just a few thousand more to go! :shock:
Just a little plagiarism going on here. I did rotate them 90 degrees if that counts :D
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NP317
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by NP317 »

Bill Shields wrote: Tue Dec 06, 2022 1:34 am I would express mild concern about the portion of the valve mechanism that is in line with the steam discharge.
My Ten Wheeler and Mikado have similar setups and they work just fine. The vent valve does not interferer with the safety valves' discharging steam.
The vent valve is for putting boiler treatment into the top, for letting oxygen out during fire-up, venting during shutdown, and for whatever else creative minds think of.
RussN
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

I was thinking more of long term erosion damage to the vent valve....having been on the receiving end of a steam blow down that carved a huge crater in to an asphalt work area.

Probably not a realistic worry in our scale
Too many things going on to bother listing them.
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NP317
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by NP317 »

"Probably not a realistic worry in our scale"

Nope, especially given the limited times the safety valves will vent steam.
RussN
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Bill Shields wrote: Mon Dec 05, 2022 5:08 pm sorry should have said OD

if you try to roll a tube in a shallow groove, you can end up making it oval instead of bending it.

this is why tube benders have 'pockets that are deep....

grooves in these 3 wheel roller machines are generally used to form rod -> not tube...
Bill,
These are the nominal dimensions I came up with:

1st grove - .173" wide w/ .097 deep pockets - overall .194" (tight for 3/16" tubing)
2nd grove - .210" wide w/ .117 deep pockets - overall .234" (?)
3rd grove - .257" wide w/ .141" deep pockets - overall .282" (ok for 1/4" tubing)

So, the tubing would sit deeper in the rollers.
If the rollers can fit thru the lathe bore, I could make them any size I want.
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

sitting deep in the roller is one thing....having the tube FIT the groove is another.

generally, these things (such as you have) are not intended for tube bending....
Too many things going on to bother listing them.
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

In total agreement.
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

I have been looking at tubing benders and there is a lot of them to choose from. Any ideals on the best one for what we do?
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

I have several from various manufacturers, each has its uses... including a few I have made or been made by very good friends.

Been maybe 40 years since I purchased one.

The big problem is that there are very few benders for the small tubing we use.

I have and rarely use the big spring things.

Make no mistake about it. Bending tubing is an art.

I use a lot of ells...

Look at how they do it on the swagelok site, they are the Rolls Royce of the business.
Last edited by Bill Shields on Thu Dec 08, 2022 10:50 pm, edited 1 time in total.
Too many things going on to bother listing them.
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

I was looking at this one in particular:

https://www.amazon.com/Eastwood-12435-T ... NrPXRydWU=
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

That will work...but think of smaller tubing


https://www.homemodelenginemachinist.co ... der.32263/
Too many things going on to bother listing them.
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