[modeleng] Re: Locomotive Crankpin Turning

Hi Charles

Thanks for sharing the link with us.  I've heard of portable machines being 
used to skim crankpins here in the UK, but I've never seen one in use.  I 
would imagine it's a day's work just to set the machine up, followed by 
perhaps an hour to skim the crankpin!  Getting the four cutters set to the 
same depth of cut must be the devil's own job.  I understand there were 
similar machines that could skim the cranks of a marine engine in situ.

The loco featured in the write-up looks interesting.  Can you tell us a 
little about it?  It looks to be a 4-8-0 wheel arrangement which is most 
unusual.

Two things struck me about it, from the broadside photo.  First, the cab is 
set well forward, such that the engineer seems to be sitting alongside the 
firebox, surely a hot seat for him!  Why is the cab set forward, was it to 
reduce the overall length to fit on a turntable?  I thought turntables were 
rare in the US, turning wyes being more common.  Secondly, the stoker seems 
to be busy with a fire iron, but his position would suggest that the 
firehole is set very low down, in fact just above the foundation ring, 
leaving no depth of firebed.  Anyone care to comment?

Regards
Ron


----- Original Message ----- 
From: "Charles & Dorothy Brumbelow" <cbrumbelow@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Friday, November 17, 2006 11:24 PM
Subject: [modeleng] Locomotive Crankpin Turning


> Here is a site with some interesting pictures showing the use of a 
> portable
> machine to turn damaged locomotive crankpins.  Enjoy!  Charles
>
> http://www.practicalmachinist.com/ubb/ultimatebb.php/topic/11/2815.html
>
> MODEL ENGINEERING DISCUSSION LIST.
>
> To UNSUBSCRIBE from this list, send a blank email to,
> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject 
> line.
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.430 / Virus Database: 268.14.7/537 - Release Date: 17/11/2006 
> 17:56
>
> 
MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to, 
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.

Other related posts: