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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 12:03 am 

Joined: Thu Dec 12, 2013 1:26 pm
Posts: 195
I've noticed that Railway Mechanical Engineer magazine often referred to driving box journals as crown bearing types.


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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 6:52 am 

Joined: Sun Aug 22, 2004 7:19 am
Posts: 6279
Location: southeastern USA
There's an alloy called Bearing Bronze and has been for a couple centuries now. Of course we also have sintered nonferrous and various polycarbonates to choose from for different appications. A babbit lining or a babbit liner poured out on the road to limp back home - there's a lot of blacksmithing heritage bound up in it.

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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 6:59 am 

Joined: Thu Oct 08, 2015 11:54 am
Posts: 1474
Location: New Franklin, OH
Dick_Morris wrote:
Even "brass" may be a bit of a misnomer. From my reading, brass is generally a poor choice for bearings. The specs I've seen call for bronze or a shell lined with Babbitt or similar.

True, that. The term “journal brass” has been around so long that rather than fight it, I go with the flow. I assume it’s because the alloy of bronze used looks very much like brass as opposed to what people think of when picturing bronze. I will mention to the uninitiated that the big chunk of metal is actually bronze, not to correct, but as one of those interesting little railroady factoids to clutter your brain.

I just found it interesting that the term “friction journal” popped up in the ‘20s. I still have maybe 250 more drawings to go through so I may find an even earlier reference. It’s been an interesting project to do while being temporarily laid up. There should be somewhere around 1,000 drawings & diagrams, all of them in very good shape considering they’ve been folded and stored in cardboard boxes for decades. The Pennsy’s engineering department used very good paper for their blue prints and blue lines.

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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 7:13 am 

Joined: Wed Sep 25, 2013 12:36 am
Posts: 535
Location: Anchorage, Alaska
jayrod,

Can you share the source for the drawings you are cataloging? Are they just Pennsy drawings, or are there drawings or tracings from outside suppliers?

I can appreciate what you are involved in, having identified and cataloged over 1,000 drawings used to build the USATC Consolidations. It's tedious but also rewarding rewarding.


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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 8:02 am 

Joined: Thu Oct 08, 2015 11:54 am
Posts: 1474
Location: New Franklin, OH
These are all drawings from the PRR engineering department. Most of them came out of the old Crestline OH loco & car shops. Lots of locomotive and tender component drawings and a large cache of equipment diagrams.

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Eric Schlentner
Car Knocker, Gandy Dancer & Hog Jockey


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 Post subject: Re: Uh Oh, Journal Bearing Terms
PostPosted: Sat Aug 20, 2022 8:50 am 

Joined: Sun Sep 14, 2014 5:05 pm
Posts: 1192
"Brass" and "Friction Journal" used in 1911:

https://www.google.com/books/edition/Jo ... frontcover


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