Thread: Farm Boy

Nice work Derek.

Yes our lawn needs mowing too but it's too COLD.

Keep up your great work

Regards

Keith

Been a bit slow on this build.

I did manage to make two pins for the rocker arm, sorry no photos.

Then I made a start on the conrod I use the term loosely as it took three failed attempts before managing to get to this stage (all down to me making silly mistakes). Some marking out and made some filing buttons for the small end. At least now it is starting to look the part with a couple more machining operations to do, one being to machine down both sides to lighten it. This is where I need to make a plate to hold the parts which I so happen to have started a while back but need to drill and tap some holes as well as make some clamps.


con rod (3).jpgcon rod (4).jpg




The second job is to shorten the big end clamp as I left it over long to aid in turning the outer edge of the big end.

con rod (1).jpg

Great stuff Derek.

The good thing about making mistakes is you don't make them again in the future - hopefully

Regards

Keith

Originally Posted by Keith_1

Great stuff Derek.

The good thing about making mistakes is you don't make them again in the future - hopefully

Regards

Keith

Yes but I made three different mistakes, well to be truthful one was not paying attention to the DRO and over shot. At least they where all not the same mistake. The annoying thing was the last one was very near the end of making this part.

I have stopped for the moment as I am making a fixture plate for the next operation.

First phot of the plate ready for drilling and tapping the second is all the holes drilled. I am now in the process of tapping all for 6mm cap head bolts which will be to hold the clamps which also need making. This will eventually enable me to hold different shapes which could not be held in the vice jaws

fixture plate (1).jpgfixture plate (14).jpg

The plate can now be used but I need to buy some more steel to make some decent hold downs but for the time being I will use these to hold the part for milling the slots either side of the con-rod.

I need to get it set up right before any work is done as the clamps are only finger tight just for the photo.

fixture plate complete (3).jpg

It is a good project Derek.

How far through it are you ?

Regards

Keith

Originally Posted by Keith_1

It is a good project Derek.

How far through it are you ?

Regards

Keith

The plate is complete as far as I can go and is usable.

As for the Farm boy engine all of the main body parts are complete as is the piston assembly, piston head. I am working down to the crankshaft once the con rod is complete which need the bronze bearings made. The flywheels also need doing which will then be all of the large items done but there are still lots of small bits to make including the governor assembly. The fun part will be the two gears that need to be made which I have the two cutters for the teeth, which was lucky as I know people that are having problems acquiring one of them I think I must have found the last one in the UK.

So plenty to keep me busy for a while

Originally Posted by Dalboy

The plate is complete as far as I can go and is usable.

As for the Farm boy engine all of the main body parts are complete as is the piston assembly, piston head. I am working down to the crankshaft once the con rod is complete which need the bronze bearings made. The flywheels also need doing which will then be all of the large items done but there are still lots of small bits to make including the governor assembly. The fun part will be the two gears that need to be made which I have the two cutters for the teeth, which was lucky as I know people that are having problems acquiring one of them I think I must have found the last one in the UK.

So plenty to keep me busy for a while

Thanks Derek

I should really complete the con rod but as I was away the weekend I thought something small before resuming on that. So I found the oilers for the crank shaft bearings and started on the first of the two, made from brass. I still need to drill out the larger hole in the top but that will wait until I have got the second one to this stage before I drill and tap a piece of metal on the lathe to screw these into to do that operation.
Crank oiler (12).jpg

They do not show any caps for these but I may make a couple of them later on.
I did have a go at grinding my first form tool for the outside shape and pleased the way that and the oiler looks.

Crank oiler (13).jpg

Very fine work you are doing.

Originally Posted by Peter White

Very fine work you are doing.

Thank you Peter

And now there is a pair completed and hollowed out

crank oilers pair (2).jpgcrank oilers pair (4).jpg

Got around to getting the con rod complete first part was to mount it on the platter that I made and set it up to mill out the recess I had to do this 4 times total because of the taper.

Con Rod final work (2).jpg

The next up was to slim down the big end cap as it was too large. The screw that you can see in the big end is not a mistake but designed to be like that when I make the big end bearing I have to make a cut out on both sides to allow for them. Also seen is the little end bearing which is a tight fit. Final job was to make the cut out for the little end bearing oil way which can be seen in the second photo along with the oil hole for the big end.


Con Rod final work (8).jpgCon Rod final work (11).jpg

Took a break from the main components today and made a start on the main oiler for the engine as I had some test tubes arrive for some single flower pots I will be turning from wood, before I do them I needed a small length of one of them for the oiler.

Most of this is from brass the first photo is a part assembled oiler. There needs to be a control needle and a sprung piece to stop it turning as well as a nut and obviously the glass.

drip oiler (1).jpg


This photo is the parts made so far except those which need to be made as above.

drip oiler (7).jpg

I am enjoying working with brass. The two discs which form the top and bottom of the oiler are just over 3/4" diameter to give an idea of the size

I also prepared some bronze for the big end bearing no photos

G’day Derek, Your “tool making” engineering are exemplary sir.
So many small precision made parts, top mark. Cheers Peter