Building a 31/2" Gauge Locomotive Engine

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sbwhart:
Thanks for you comments and engouragement chaps

Stew

sbwhart:
Ok Chaps

Got the case hardening powder, to case harden the links from Chronos, this is it.

For thos of you who don't know about case hardening what its about is soaking the mild steel parts in a carbon rich environment at about 900 to 1000 deg C, what happens is some off the carbon soaks into the skin of the steel so you get a hard skin on it, this process has been used for a over a 100 years so its not new.

Just one word of warning some of the old case hardening powders had cyanide in them and other nasties so only use stuff that is new and you know is ok.

This is what you do.

I wired the bits up so it was easy to pick the bits up with pliers.

Made up hearth so that it formed a little cave so that it would get good and hot.

Before you start to get things hot make sure you got no inflamables about you don't want to set your self on fire :zap:

With a gas torch heat them up to a nice orangy red its better to do this in natural light so you can se the colour.

When you've got each bit up to temperature cover them in the powder a leave them to cool.

When cool take them out of the powder and heat them up to orange again and hold at this temp for about five minutes to burn more of the carbon in, then quench in water.

Her we are job done

At this point sods law struck whilst I was taking the wire off and cleaning one of the links up the darn thing sprung out of my hands and landed some where in the shop, I looked and looked and couldn't find it.

At this point I went and got the boss with a torch, she's a fan of CSI, how come Grisome and Nick Taylor can find a pin head of blood that catches the baddy and we can't find a bloody loco link.

At this point I was P****d off, the boss said that the only way to find it was to stop looking for it, sound advice I thought, so I started to make a vice stop, it still didn't turn up, tonight had another look for it,

Boss said is it in this bucket with all the metal shavings,

No that too far away,

I'll have a look any way she said, ho is this is :doh:

:D :D :D :D :D :D

Well alls well that end well.

Have fun

Stew

Divided he ad:
Sounds like you've been having fun Stew :lol:

Always look where there is the most metal to cut your hands.... That's where it always lands!!!

Looking good.... U sure you won't have it finished in a few months? ..... Looks like your storming ahead :thumbup:

Don't know if I've said this already but just in case... Thank you for the hammers :thumbup:
Not that I've had chance to use them yet!! First time in the shop for weeks and I was re-soldering the water feature light!! :doh:

Anyway, won't be long now.... Got one of the diff's for my mates landy tonight (off a scrap one!) and the other is coming next week..... just a few more nights taken up and stopping workshop progress! ..... Not that that's anything to do with a loco build :scratch: :)

Won't be long to the running chasis now eh? :D

Ralph.

sbwhart:
Hi Ralph

I was wondering where you'd got to, John said this was a busy time of year for you :hammer:,

Thanks for the loan of the mould for the hammers, and the tube for the handles is just great :thumbup:.

When I've completed the loco reverser I need to make a handle for it I can either buy a casting or make from bar, I'm making from bar, so I need to get some kit made for my RT, so the loco will be put on the back burner for a week or so.

Have fun and don't work too hard.

Stew

sbwhart:
:offtopic:

Ok this is a bit off topic but a few post back I said I was making a vice stop, well its finished I based the design on Johns excellent thread her http://madmodder.net/index.php?topic=1007.0

So this is my attempt

Yet another job ticked off that will improve my little shop :nrocks:

Have fun

Stew

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