6" Gold Medal Tractor

[mutley]

Well as DJ thinks this board is a bit quiet and that its full of armchair engineers I thought I wouold post some piccies of my latest efforts...

I have started construction of a 6" scale Burrell Gold Medal Tractor to the Little Samson design.

The hand brake and flywheel brake rods with their respective bushes and the taps used to cut the threads in the bush. All threads where cut in the lathe one is a left hand thread.







first attempt at the drive peg securing arranagement and the jig used to bend it.



Fast speed and middle/low speed gear change levers. The larger lever is a fabrication of 10 different parts.





Diff. lock lever and regulator.



Firehole doors



Parts for the rear rope guides, tuirned from stainless steel.



Diff lock operating collar and a part machined bush for the diff lock.



Left hand main crank bearing housing.



Main horn plates with second shaft housing and rear axle tube.
These plates arre 5mm thick and the left hand one has a 1" offset at the top. Fortunatley they arre supplied with this offset in palce. To give some idea of size the surface plate they are sitting on is 24"x18".



The spectacle plate and front plate are fabrications from 3mm steel.



Part machined right hand main bearing housing. This was truned in the lathe!



Of course thsi all just a distraction from the real project of getting this Jubilee finished.

[alanstepney]

Wow. Or perhaps I should say WOW!!

That is superb. Excellent workmanship, and on some of the tricky parts.

It will certainly be an interesting model to rally, and should be a lot of fun.

[drjohn]

Most impressive mutley.

How did you hold the parts for the gear change levers while soldering them - did you make a jig?

DJ

[steam4ian]

Thanks Mutlet

That's inspiring, enough to eject me from my armchair. Pity it is a working day with a few clients/potential clients to satisfy.

Pictures like that are a great way to keep this site active.

Regards
Ian

[jasonb]

You have been keeping that one quiet Chris, you are making quick progress there. Looks like the M300 is earning its keep.

Keep the pics coming.

Jason

[drumkilbo]

Lovely work and particularly well photographed as well.

Ian

[mutley]

Thanks for all the positive comments guys.
Hi Jason yes the M300 is earning its keep now.
DJ, the fast speed gear change was a challenge and took longer to think about than make.
First step was a steel blank 1.25" x0.5". This was setup in the 4 jaw and the round handel turned on the end.
Next it was to the mill and three holes drilled corresponding to the centres of the openings. The blank was then milled to profile for both thickness and width and just to complicate matters it tapers in width in two dirrections. The recess was next to be machined on the top face.
I then turned 3 tubes with location pegs on the end. These fitted into the holes drilled in the base plate and held them in place for silver soldering.
Next was the gusset plate at the rear. This was held in place with a couple of tack welds whilst it was silver soldered and then profiled to shape with a large file!
Back to the mill and the centre section was removed from between the two centre pillars to enable two blocks of steel to be added to make the straight sided section. It was two blockas as I didnt have one piece large enough.
Once soldered the middle was removed in the mill.
Then with gentle heat taking care not to melt the solder the two curves where bent using the milling machine table and some large lumps of steeel turned to help form the correct radius.
Finla op. was to 'tack' the front gusset in place with silver solder at either end. Its only tacked as its not really adding any strength. You can see the 'tacks' in the second photo.
To give an idea of size the width is 1.125" and 12.375" long. The central section is 1.5" long by 1.125" wide with a height of 1.75".

Andy

[drjohn]

Ok Andy, thanks for that, you've given me food for thought. I'm bogged down with Don Young's complicated fabrications and couldn't see how to hold all the pieces in place for the big solder bit, but a tack weld just might be the answer.

Amazing - I never realised that a mutley was making such stuff - well done and keep the pics coming to keep this forum alive.

Thanks for the inspiration.

DJ

[Shawki Shlemon]

If Chris is keeping this great project a secret ,how many others are doing the same I wonder !!! Terrific work and most impressing quality , keep up the work and surprise us with more of your production .