Building a 31/2" Gauge Locomotive Engine

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sbwhart:
Lifting Block

I decided to make the lifting block out of an old rail spike I picked up on a walk, it sort of appeals to my sence of history.

Her it is with the middle bit cleaned up

First job mark out the holes and cut the block out.

Next job mill the block out to size, because my vice is dead square, and using a parallel as a stop, pushing the block hard up against the stop automaticaly brings it square (using the in built acuracy of the tool)

Then the holes were drilled I drilled the holes first for two reasons 1:- It will take some meat out for when the slots are milled. 2:- After the slots are milled the ssction will be thin, that could bend if you tried to drill the holes in it.

To get the block square it was first lightly gripped in the jaws then a parallel placed on top and the parallel tapped with a lead hammer bringing the block level with the jaws.

To mill the slots again the squareness of the vice was used to set the block square. The slots were first chain drilled out 7mm deep then the slot cut out using an 1/8" slot drill to a depth of 8mm.

The final job was to mill out the angles and file the rads using filling buttons

Her it is finished

And this is where it will fit.

Thats it a bit of Railway History built into my Loco

Cheers

Stew

bogstandard:
Wonderful bit of work Stew.

It is not the shape of material that you look at, but the shape that is inside the material that counts.

Use anything you can get your hands on.

John

Stilldrillin:
Nicely done Stew! :thumbup:

David D

Darren:
You are making a wonderful job of this Stew, that part looked complicated, well to me it did :ddb:

Great thread, following with even greater interest. Nice to see you are showing how to tackle each part :thumbup:

sbwhart:
Thanks for the encouragement Chaps

Now for the last bit of the valve linkage the Rocker Arms this is the bit that will move the valve rod in and out.

The arms has a left right bend in it and is fabricated up from 4 bits that are silver soldered together.

These are the bits

The bends were done in the vice with a wolop from a trusty hammer (when I nod my head hit it :hammer:) in order to form the bends packing pieces were used.

The bits were soldered together and the arm griped in the chuck by the sacrificial stub, it was centre drilled followed by a 1/4 drill.

You have to be carfull you don't tangle with the whirling arms.

The sacrificial stub is cut off.

The rest of the required holes drilled, the top one is a slot that is done with a file, and the finished shaped filed out and cleaned up.

Thats it job done the rocker with the longer arm also doubles as the drive to the lubricator.

And this is where it fits.

I've still got to case harden the links don't let me forget that :poke:

Stew

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