Re: Roller-Bearing Axles . . .

Chris Walker Wrote (approximately):
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> {Why continue} with those brass blocks
> for axle bearings instead of rollers, and
> {not} putting rollers on the main rods?

SR_Krause Wrote:
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> . . .  I'll point out that rollers on the rods are
> bulky & heavy and add to the rotating mass
> that has to be balanced . . .


The S.P. tried roller bearings on the axles – NOT the rods – of their last two Daylight 4-8-4's* -

. . .  and found that the improvement over their patented oil cellars wasn't enough to justify the cost.  IIRC, the C&TS has been replacing the grease block axle lubrication of their K-36's with oil cellars as the engines go through the shop for major overhauls, as this not only reduces friction but also eliminates the tedious process of lowering the binders frequently to renew the grease blocks.

- Roosso

*  #4458 (Timkin) and #4459 (Symington)



Edited 1 time(s). Last edit at 02/25/2019 03:17PM by Russo Loco.