Finishing off a 5" Gauge Simplex Loco

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sbwhart:
Cheers Dave

Little more progress and corrective work this week.

Before I finished off the bearing blocks I was far from happy with the width of the horn blocks, they should all be the same width, but what I had got, was up to 1mm variation even from side to side and up and down on the same horn.

What was needed was to sit them on the front face and flash the back face off to make them all the same. To do this I needed to make a fixture and work out how to clamp the frame too it. For this I used the jig plate that I made some time ago, First clamp a chunk of ally to the jig plate and mill out a platform for the front face of the horns to sit on.

Turn the jig plate round 90 deg then sit the horn on the platform use the jig plate to clamp the frame down, starting with the thinest horn skim it off level, then repeat with the rest to the same zero setting on the mill, and they all ended up the same size and nice and parallel.

I then spent a good day trying to assemble the frame square, (measure across the diagonals to check for squareness) after trying to assemble the frame in all sorts of combination with twisting etc I had a think about what I hadn't checked that may effect squareness, checked the squarness of the streachers, sure enough the front streacher was out of square this was having the effect of pulling everything out so made a new streacher.

Old and new streacher

That sorted it.

With the frame square and the horns all the same it was an easy job to mill the groove in the bearing blocks to fit in the horns, sorry no pic of this

Then it was a matter of drilling out first using centre drill then bigger and bigger drill up to 19mm and finishing off with a 3/4" hand reamer, I marked the blocks up so that I could assemble them in the same orientationas they were drilled.

Drill and tap for the spring hangers and drill the top for an oil hole.

Then final fitting by bell mouthing the groove so that the wheels will move laterly to take up unevenness in the track, what you're after is a nice smooth fit not too tight or the darn thing will derail.

And fitted in the frame

Whilst I was maching I was also painting the frame and letting it dry, toward the end I had to start a new can of paint for some reason it started to look even more patchy than my usual crap painting so gave it another coat even worse :scratch:

Checked can :Doh: Dark Green not Black that will teach me to shop without my glasses.

Stew

NickG:
Looking great Stew, shame about the green paint! :lol:

You're nearly back to where you were but it's like a new chassis now. :thumbup:

Stilldrillin:
Stew.
I was reading along..... Thinking how accurate, and professional it was beginning to look. :thumbup:

Then I bosted with laughter, at the thought of a camouflage paint job. :) :bang:

Three steps forward......... :Doh:

David D

saw:
Nice work :bow: :bow: :bow: :bow: :bow:

sbwhart:
Cheers Guys

Camolflage paint :drool: now thats an idea :D

Bit more done not many pics this time as it was mainly boring stuff.

As the crank pins and been bodges the same as the axles decided to make new just a nice hand tight fit in the wheel then some loctite.

Then using the quartering jig and high strength loctite secure the wheels in place, it doesn't mater if they are out a deg or two but all wheels must be out the same using the jig makes this job a doddle.

After letting the locite do it curring thing tried them in the frame :Doh: i'd put one axle block on the wrong way, nothing for it but to pull the wheel off, with the origonal axles they came off easy after a bit of heat from the heat gun, but this there was more resistance I was ******** myself that I would crack the wheel so a bit more heat and another go still nothing, so a lot more heat and another go this time bang:--- :( crapped pants:- but it was only the loctite giving way. I supose thats what you get when you do the job correct :D

Made new axles box and spring keeps and fitted the springs, I was assembling the last pair of springs when Murphy struck, I slipped and:- ping one of the springs disapeared a quick search and nothing:- plan B, clean the shop nothing:- plan C, call CSI in for a forensic search nothing:- plan D, order a new set of springs and its bound to turn up. That worked took a casual glance and their it was peeping out from under the mini wheel lauging at me. plan E cansel new set of springs.

:lol: :lol: :lol: :lol:

Her it is all assembled.

Also took delivery of a trolly lift to help move the thing about a load and unload it from the car, bin looking for one of these for some time and Dek spotted these on ebay £200 free delivery a good £50 saving on other supliers:- Thanks Dek :thumbup:

Stew

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