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John Rudd:
Looking good so far Stew...... :thumbup:

Are you planning on doing the same sort of thing for a boiler? :scratch:

sbwhart:

Thanks chaps

--- Quote from: John Rudd on April 20, 2013, 04:36:12 PM ---Looking good so far Stew...... :thumbup:

Are you planning on doing the same sort of thing for a boiler? :scratch:

--- End quote ---

No John I have no plans for fitting it to a boiler, I doubt my choice of materials would make it suitable for steam running.

Onwards and Upwards with the bearings housings.

These are made from 5/16 thick bar not 1/4 as in the drawing i thought 1/4 would look a little flimsy.

Fist job measure the height of the piston rod to make the bearing centre height the same, then cut a couple of chuncks of the bar roughly square the ends up with a file and mark them out then as for the con rod centre drill the ends for between centre turning, I cut some of the surplus material off by hacksaw first then on to the lathe for facing off to length and turning to shape.

For the next bit I desided to fit my vice stop to my new drilling vice this was just a mater of drilling and tapping a M6 hole into the side of the vice.

Then onto the drill for drilling the 12m hole for the bearing I made sure that the base of the bearing was up against the fixed jaw and that the vice was firmly bolted down and the stop set.

Drill the first housing then without unbolting the vice drill the second again with its base up against the fixed jaw this way the centre height will be the same for both housings.

Then drill the bolting down holes 2.5mm dia again taking advantage of the vice stop, I wish I'd added this before I started.

The give them a good seeing to with a file and filing button the shape the top

Turn up the bearing.

Fit them in place with some loctite

and its another job done

Stew

sbwhart:
Bit more done:- the Cross head

Made from a bit of oblong section bar, start by marking the centre on a end face accuratly centre pop the position.

The using a wobble bar centre it up using a four jaw independant chuck.

Turn a step up centre drill and tap M4 for the piston rod.

Keeping it on the bar helps you to securly clamp it, drill a couple of hole to form the slot.

Flip it on its side and drill for the end pin.

Then cut it off the bar hacksaw the slot and file to fit

And its another one done.

Stew

sbwhart:
A few more parts done,

First up the bearing brasses:- drill the clamping holes in some 1/4" brass square bar

Then bolt them too the con rod mark the centre line and drill and ream through 6mm dia

Then make the end plat sorry no pics for that bit.

Then make the little end gudgion pin

The the slide bars to get the M4 tap square I light held the tap in the chuck jaws just enough to keep them square but not enough to stop it turning in the chuck then with the wrench clamped on the parallel bit of the tap start the tap nice and square, and remove the job from the vice to finish it off.

Thes are the bits

And how they assemble

Stew

saw:
Beautiful work :thumbup: :thumbup: :thumbup:

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