Class A Roller Bearings

[NW Mailing List]

For shame, Dave.  I would have thought that you of all people would have had 
a copy of the original book on the A . . .

EdKing
----- Original Message ----- 
From: "NW Mailing List" <nw-mailing-list at nwhs.org>
To: "NW Mailing List" <nw-mailing-list at nwhs.org>
Sent: Sunday, April 08, 2007 10:35 PM
Subject: Re: Class A Roller Bearings



> Clever!  I wonder if this is what is meant by the term, "cannon axle 

> boxes", which I've seen used in the context of steam loco roller  bearing 

> applications?  It also helps the lateral loads on the  bearings when the 

> axle is tilted crosswise relative to the loco  frame, as when running 

> track with longitudinal twists (or varying  cross levels).

>

> Its similar to the "full floating" rear axles found (or found at one 

> time) on heavy trucks, etc.  There, they were intended to keep the  wheel 

> from falling off if the axle shafts broke (as they still  sometimes do on 

> heavy trucks).

>

> I wonder if the reduced maintenance was worth all the installation 

> effort?  Roller bearings in these applications had to be so strong  just 

> to absorb the usual loads and shocks that this extra effort  might well 

> have gone unrewarded.

>

> pete groom

>

> On Apr 8, 2007, at 6:12 PM, NW Mailing List wrote:

>

> "Can anyone on the list enlighten a couple of NWHS

> members regarding how the first style of driving axle

> bearings worked on the Class A?"

>

> Dave,

> I'm not sure if this is what you are looking for or if it will come 

> through. I found this in the Feb.1940 N&W Magazine. pdf file attached

> Jimmy Lisle

>

> [pdf file on web site at: http://www.nwhs.org/qna/RollerBearings.pdf ]

>

>

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