Thread: Farm Boy

G’day Derek
That’s the stuff of nightmares for me, remembering back to machine exercises during my Naval engineering training.
Better you than I sir, well done.
Cheers Peter

I must confess Peter that they did worry me doing these like many things as I have never done gear cutting before so getting the set up right took longer than the cutting of the teeth.

I have been a bit quite on this build, other hobbies take up the time like getting the garden ready for winter. Just started to get cold now so heating in the workshop is needed, I did get out and started a couple of parts for the geared wheels hopefully get those done in the next couple of days.

Just a couple of small parts made over the last couple of days. I did waste over an hour looking for my 1/4" collet which seemed to disappear into thin air, workshop gremlins at work to only find it right in front of my eyes sitting on the lathe why it should be there as I last used it on the milling machine.

Anyway the two parts which enabled me to test the gears on the frame(rubbish video but you get the right idea) a bit awkward using one hand as I was steadying the camera with the other

Cam assembly (4).jpgCam assembly (5).jpg

Seems like ages since I last posted as well as everyone else I would have thought there would be plenty of Christmas presents being made for the children or is everyone still making them. I know I did stop to do a couple of boxes for Christmas see in the Pyrography section.

Anyway I have managed to get into the garden today as it has been raining for quite a few days as well as also getting into the workshop to work on the governor assembly for the little Farm Boy.

Turned the main body but left it on the main stock as there are other things that need doing to it that require the extra material to hold it.

After the turning I made the two arms followed by cutting a couple of slots in the turned part, still need to drill two holes that is why it is still set up in the milling machine touch wood that will be tomorrows job followed by turning a couple of pins ready to silver solder the arms in the slots that will be another thing that I have never done before I am alright soft soldering.

Arms only resting in place to show how they go. Milling cutter set on centre ready to start again tomorrow.

govenor assembly started (5).jpggovenor assembly started (6).jpggovenor assembly started (7).jpggovenor assembly started (9).jpg

Nice work Derek.

Regards

Keith

Thank you Keith.

The governor parts pile has some more parts added to it all small parts but seem to take ages to do even if they are simple still some more to make. I have not yet soldered any parts as there are a few more that need hardening so will do the soldering and hardening all at the same time weather permitting as it is raining here.
The brass pins with the thread on the left are 1/8" diameter to give an indication of size the split pins that will be used on the silver steel pins are 1/32" to fit in the tiny holes

Govenor parts (1).jpg

Nice work again Derek

Regards

Keith

I have managed to do some more between having to buy and set up a new compter as well as getting the car passed a MOT heree in the UK(Basically a fit for use on the road test).

Any way a few more parts some for the Govenor assembly and some for the exhaust valve assembly.


Govenor partts

gov and valve rods (3).jpg

Exhaust push rod assembly


gov and valve rods (7).jpggov and valve rods (4).jpg

A general view of both assemblies some need to be silver soldere together I will ddo them in a batch that is why they are still in pieces to give an idea of sizze the two brass balls are 5/8" dianeter


gov and valve rods 2.JPG

Then I did make a couple of support brackets for the valve rod assembly which are 0.600" long and to make life easier made a small jig to cut the angles on each end after refreshing my memory with a little trignometry. I don't think much will be done this side of Christmas but if any then I will post as and when there is any progress.

The jig with the parts still needing a little clean up then one with it in the vice showong how the parts will be sat in it and finally with it all secured and the angle being machined. I was appy how the jig performed. Just to point out the jig is a fraction narrower than the part so it grips it while machining

guides.jpgguides 2.jpgguides 3.jpg

Three steps forward and one back seems to come to mind. I machined two little back plates which I made a simple jig as they are only 0.025" thick and 0.250 wide I did them both at the same time.

Spacer (1).jpgSpacer (3).jpgSpacer (4).jpg

Then I desided to start on the fuel mixer the main body was completed out of a 0.500 hex stock which went well. I then moved onto the little mixer bar that fits into the body drilled and threaded one end and drilled the small centre hole and this is where it went wrong O cut it over long and turned it around in the collet chuck so that I could machine to length being only 0.125" diameter and a 2-56 thread inside the obvious happened it snapped oh well I will machine to length first next time before drilling and tapping again.
The grub screw in the mixer need either a shorter one or the one I have needs machining shorter, thats for another day

Fuel mixer (4).jpgFuel mixer (5).jpg

No photos of the oops moment only the other work completed.

The fuel adjustment screw. Now where did I put it

fuel mixer smaller parts (5).jpg

Oh there it is

fuel mixer smaller parts (7).jpg

Next is the spray bar that the adjuster fits into I had to drill from both ends and a smaller one right through this is ny set up to get the correct drill depth one end is also threaded 2-56unc

fuel mixer smaller parts (3).jpg

the parts showing the main body, spray bar and adjuster with a tape for scale. The spray bar I need to set upon the mill to drill a cross hole with a number 76 drill (0.0197" or 0.50mm) I have left one end at 1/8" diameter until I get the fuel pipe from the fuel tank once I make that

fuel mixer smaller parts (22).jpg

The fuel mixer assembled except for the hole that needs drilling as well as a grub screw the right length

fuel mixer smaller parts (20).jpg

Great precision work.

Originally Posted by Peter White

Great precision work.

Thank you peter. I do find that it takes me twice as long to make small parts like the screw, but then I am not in a race.

Been busy with other things since the last post. I have started to sort out the garden as well as look after the wife as she was not too good (all OK now) which meant housework and cooking which I love anyway(cooking that is)

Anyway had to remake the small fuel delivery bar as I was drilling it with a cross hole and messed it up as the bit was a #76 which is quite small. Now that is all done, I can make an elbow to go from the mixer to the head
Some photos of the fuel mixer with the bar which is only 1/8" diameter so that gives an idea of the cross hole size.

fuel mixer #2 (1).jpgfuel mixer #2 (2).jpg

The now finished fuel mixer made from a 1/2" hexagonal stock


fuel mixer #2 (6).jpg

Great precision work.