Building a 31/2" Gauge Locomotive Engine

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Brass_Machine:
Stew...

As always, nice work so far. Feels like I am there watching this build go on. :ddb:

Eric

sbwhart:
With the loan of the 3/16" slot drill from John I've been able to finish off the cross head so this is how it went.

To avoid the milling holder crashing into the chuck I had to extend the cutter out from the holder I've got a selection of holders suitable for unthreaded cutters (FC3 type) so I used one of these:- ther's one in this picture.

It was a matter of taking a cut along the cross heads, rotating 180 taking the same cut and measuring the width across the slide bars until I got it to 1"

I got it to within .005" and called it a day.

Next the chuck was removed from the RT with the work still held in it and remounted on the lathe.

The through hole was finished off to size, and the small boss turned, and then they were parted off from the bar.

I then made up a soft filing button to act like a nut and bolt and the two cross heads bolted together back to back.

Drilled right through both 1/8".

Milled out some of the meat.

Then filed the rest out till it looked OK. Her they are with the button.

And separated

Then the pin was turned up out of silver steel

And this is how it all fits together

I was really pleased how using the RT to make the cross head turned out, when I fitting them to the slide bar in the cylinder the piston rod should line up with the through hole in the cross head I was expecting to have to do a bit of fitting and packing, and :hammer: but no they lined up perfectly.

:D :D :D :D :D

Have fun

Stew

shoey51:
wow Stew that was great work there mate :clap:

Darren:
Stew, I can see that I'm going to have to take a trip to yours just to see this when it's finished... :thumbup:

sbwhart:
Thanks Chaps

I've just done a bite of a stock take on bits to make before I start assembling to the frame and its zero,

I've not been looking forward to this:- I'm getting to the point when the chickens come home to roost.

:zap:

Stew

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