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Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Wed Jun 07, 2017 4:51 am
by DanSmo
Asteamhead, thank you! By the way a pizza oven is a great idea! I'll have to get one specifically for doing the rest of the rims.

These last few weeks I decided to tackle one of the more repetitive tasks and get it out of the way. Springs.

After a lot of investigation I decided to cut them with an abrasive wheel and drill the holes. I considered punching and cropping but considering the time to make and/or source the tools I would have them done faster if I cut and drilled.

Using the angle grinder with a ultra thin cut off disc kept heat to a minimum and when the disc showed signs of glazing I swapped a fresh one on. I cut all the leaves about 0.5mm longer to allow for cleaning up and squaring off with a quick pass of a with a carbide end mill. The leaves were then dropped into aluminium drilling jigs I made and stack drilled with straight flute carbide drills. The clamps were made from box section and the rollers are 0.375" rod that was drilled in the lathe. I did deviate from the drawings however, which called for a 0.125" pin to pass through the roller and be riveted over at either end. I simply used an M4 button head cap screw and tapped one side of the clamp, any excess head height that causes interference will be ground down. It has the bonus of making spring packs more easily serviceable should they need attention for whatever reason.

As of now 2 engine truck, 10 main and 4 trailing truck springs are done. Just another 14 for the tender and the monotony is over!

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Wed Jun 07, 2017 9:03 am
by boaterri
Your wife's kitchen oven should be able to get to 250c (482f) just do a "mother may I" and make sure that there is no oil or other nastys to make smoke/odors.

Rick

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Wed Jun 07, 2017 7:06 pm
by Asteamhead
Hello DanSmo,
Nice job on your springs! For my A, I did it almost the same way. perhaps some fotos my be of interest to you :D ?

Best regards Asteamhead

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Sat Jan 04, 2020 9:10 am
by RICHK
Hello all:
Does anyone know what is happening with dansmo?
It seems that his build log has stopped
His last activity was on Fri Jan 03, 2020 5:54 pm but I cannot contact or see what that was.
He has not responded to my private message.
Sure would be nice if he would.

Rich Killen, Seattle WA

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Sat Jan 04, 2020 9:39 am
by RICHK
Hello Dan.
I am curious to learn more about your Big Boy project.
Your blog seems to have ended at June 7 2017.
Sure would like to learn what is happening.
Also I see on the site that your last activity was on Friday January 3 2020 just yesterday.

By the way my e-mail is rjkdk@comcast .net

Regards,
Rich Killen, Seattle WA., U.S.A.

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Wed Aug 04, 2021 10:22 pm
by SteveR
Bump

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Fri Aug 20, 2021 11:40 pm
by Rob Gardner
I think Dan posts exclusively on various FB live steam groups only these days. Don't know why he abandoned this thread on Chaski.

Rob Gardner

Re: Union Pacific Big Boy 4012 in 1.5"

Posted: Sat Aug 21, 2021 9:03 am
by Andypullen
I talked with Dan last week.

He’s very busy with other projects at the moment.