The Bolton -Bertinat -Bailey Triple expansion engine

[vtsteam]

Lots of good tips and methods in this build. 

[steam guy willy]

Thanks for all the comments and this is the advantage of being a septuagenarian ...that one has a lifetime of experience to fall back on ??!!! after making lots of mistakes ..etc etc  the jig has now been used to drill and tap all the eccentric straps and when I tap holes I like todo it horizontally rather than downwards on top as  ones hands work better in that configuration ???!!.  The next job is to make the steel eccentric rods using the steel jig 

Willy

[Roger B]

Good progress on the eccentrics 

I also often find it easier to hand tap horizontally 

[steam guy willy]

I have started on the rods and the bolting part is drilled and filed to fit ...the steel bar is bigger then the finished dimensions and it needs filing to shape ...after bolting it in place I file it inset and I use guide pins in the vice ....these are broken 1/8th centre drills that are hardened steel . holes are drilled at right angles the cast iron vice jaws and the parts are held in the vice in the correct position and the file is used to just bear on the part being filed . when turning the shaft on the Unit lathe I use a small jubilee clip as a stop for the cross slide. and when turning parts I use the Smallwood gauge to get the finished dimension ...

Willy

[steam guy willy]

More work on the eccentrics ..these ar quite complicated parts and all have yo be very accurately made   so are jigs on the way
Willy

[crueby]

Great  progress  Willy!   

[steam guy willy]

Thanks Chris ,,,and more on the rods and I have turned them to size and tapped them 5 BA to attach to the upper forks I have the drawings and also the Model engineer writeup that have different dimensions on them so again I will have to make the parts from both ends to marry them up ?? however some state   "check from job "  ??!!

Willy