These ads help to keep Steam Tube free.  You can advertise here too!

Click a link - there's so much to see!

 Sign-up | Photos | Videos | Chat | Facebook | Twitter | Home

.................................................................................................................................

Don't forget to 'Like' and Comment on the photos and videos!

Your Rail News

Get your daily Rail News for just £3 per month! Rail Tube

Links

Images from Twitter!

Re-metalling middle big-end of #34007 'Wadebridge', Ropley, 21 June 2011

Bob Preston & TW today re-metalled this bearing half (and two for Schools Class: 'Cheltenham').
The bearing and chill are heated evenly to over 250°C, literally spot-checked with a laser thermometer, and molten white metal is ladled in.
The chill moulds the white metal to save machining waste.
The bearing is grooved and tinned with pure tin but the chill is limed to stop the metal adhering where it shouldn't. Edges are sealed with a special putty-like compound because molten white metal is formulated to run freely so will leak fast given half a chance!
(We were too busy to film the pouring of the molten metal - see it here.)
Result
The journal was checked for ovality and found OK: the white metal will be machined to fit it with the correct clearance.
 
We metalled the 'Cheltenham' bearing halves later.
  

Views: 1152

Make a Comment

You need to be a member of Steam Tube to add comments!

Join Steam Tube

Comment by TFC on June 22, 2011 at 8:32
Its nice to know she's on her way back Tony. TFC

© 2015   Created by TFC.   Powered by

Badges  |  Report an Issue  |  Terms of Service