3" Burrell Traction Engine build.

 Big End Bearing part 2 Hi, It’s been a while—between holidays and the nice weather—but progress is still being made, despite the extreme temperatures in the workshop. Most of the time, the trusty Centec 2A mill is set up in its vertical configuration for small nibbling, slotting, and similar tasks. For parts that need light skimming, I often use the lathe instead. As the title suggests, I’ve been working on the big-end bearing, which requires an accurate 1/2" slot on both sides. For this, the horizontal mill setup is ideal. It allows the part to be flipped easily, ensuring both sides are machined to the same depth with precision. The side and face cutter I’ve been using isn’t the sharpest tool around, and there’s a bit of chatter at the start and end of each cut. That may just be typical for this type of cutter—I’m not entirely sure—but it’s worth noting. Still, it handles 0.080" deep cuts quite efficiently, removing metal much faster than an end mill, with less risk of t...

 Big End Bearing and Boiler Tube. The most recent development is the appearance of the big end bearing I received for Father’s Day—it finally made its way onto the milling machine. As expected, it was oversized all around, with the usual tapered side walls (draft angles) to allow it to be removed from the mould. I thought it was quite large, but apparently, it's a replacement for a previous version that was too small, which had prompted many complaints from builders. So, I suppose in this case, bigger is better than too small. As for the boiler tube mentioned in the title, I originally planned to modify a pub-style gas cylinder as a mock-up. However, it proved difficult to cut, and I ended up running out of oxygen in my BOC Portapack (oxy-acetylene setup). Then I remembered that my nephew owns a plasma cutter—and being eager to help, he was more than happy to have a go at burning off the top and bottom for me. Having received the new tube back, there is a snag. I could not accurat...

 Motion Mock-up; Where we are; and why ? Above are all the current motion parts posed for a photograph, this represents a few months work and in casting terms a few pounds. The problem is with not having the boiler, some of the parts are left longer with spare material to either finish the parts, or extra length if required to be finished later. Actually I intended making a mock-up boiler but this has not been completed. To be frank I ought to be at the position of ordering the actual boiler but the prohibited cost and the fact of having a large expensive item taking up space in the workshop.    Fathers day It’s become a bit of a tradition that I receive a casting for Father’s Day. This year is no exception—though, as usual, I bought it myself and am now working out the usual post-purchase “negotiations” to avoid it being considered a self-gift! And here it is—massive !!!.. The first thing I did was to double-check the drawing and the invoice to make sure they hadn’t ac...

 How I tackled the connecting rod from scratch... Hello! If you're still following this build blog, you've made it to the explanation of the connecting rod. I had been working on several other parts, still with the mindset of fitting each component to the next through a process of trial and adjustment. In this natural progression, the next part to tackle was the connecting rod. At first, I thought it would be simple—a rectangular piece with a turned section (actually a taper), so just some straightforward lathe work followed by a bit of drilling. But here’s the thing: the piece of material I was planning to use turned out to be slightly too big. Also, it wouldn't fit in the chuck, the internal bore is just under 1" on both of my lathes then after looking at some pictures from the  http://eastgrinsteadmodelengineers.co.uk/projects-gallery/3-scale-burrell-agricultural-engine    I saw a connecting rod being produced on a CNC milling machine.  From a round bar !! T...

 How to tackle a casting.......? Firstly there are some great resources out there to help a builder with machining a Burrell. Burrell Head Page        https://www.laughing-dog.co.uk/model_eng.htm . Traction Talk              https://www.tractiontalkforum.com/ Facebook                     3" Burrell Builder's Group    (508 members all concerned with building a 3"). On the Facebook group mentioned above, someone commented on a post of mine saying "I wouldn't even know where to start machining parts like that". My complex answer is simple, choose the biggest flat surface and use that as your starting point or datum. Remove any sharp edges, and file off any burrs or casting lands. I even sometimes, grind them off, then chuck it in the lathe to take some metal off, to create a good starting point. Then decide what areas need machining, since your starting with a casting it ...

 Mock Boiler for a Welding task Hi, progress is heading into a new phase. A mock-up boiler - with thanks to a few members on Facebook for sending me the drawings electronically.  I have all the drawings apart from the boiler ones possibly because if your expecting to buy the boiler then there is no need to obtain the boiler drawing. (save a few quid).            And the concept proven, just need the Gas Axe expert to pop round and show the old man how its done. Mr 'PUUSH...' !! This is my homemade shop press that has finally been completed, and the first parts, type C - 5mm keyways successfully cut in the rear hubs. It has been a long time coming and improvements to my welder, new PPE equipment and a Savage A40 ESAB welding mask have all be acquired to aid the job.  The 2 Ton bottle jack is more than capable of pushing the broach ram trough a cast iron hub of 2" length. The studs welded on are for a potential guard but require the Perspex to ...