Using a length of 4mm glass tube with a 2mm ID and a glass tube cutter, the idea was to try and make a miniature oiler for the bearings.  On the plans there is no facility to oil the crankshaft (maybe there is no need) but on the metric plans made by Julius there is an oil hole on each of the bearings and eccentric.

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So I tried to cut a piece of glass tube with the cutter. Piece of cake. Then I tried to cut a short piece (4mm) and that's when I started to get problems. As it was too short to be supported by both sides of the cutter it would crack. Tried to insert a piece of BMS in the tube to support it but still no joy.

So off to the lathe. The tube was lightly gripped in the chuck and a Dremel cutting disk (I did not have a diamond disk) was used to cut the tube.  Success, but the piece could not be found as it flew in oblivion. Another piece was cut with the same result. Third attempt, but this time I inserted a matchstick in the tube.

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It flew again but not so far and with the matchstick was easy to locate.

The metal parts of the oiler were made from brass.  The thread is 3mm and the through hole is 1.5mm. The glass tube is fixed to the bottom with superglue (hope it holds) and the top with Blu-Tack.

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Then I remembered that when I separated the bearings, a 5mm piece was left over.  

To give me an idea how it would look, I fitted the oiler to this bearing scrap.

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When I did the other two oilers, I used a 4mm collet instead of the 3-jaw chuck as it was already fitted.  I think it holds the tube better;  only hand tight to avoid breaking the glass.

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Yes, I know it's a bit crude.

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Here the cut was done with the Dremel still attached to the toolpost.  Its not a clean cut.  What I did was to start with the Dremel attached to the toolpost and then for the last bit of the cut, I handheld the Dremel and very lightly touch the groove made previously.

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And here the finished oilers, two of them still needing assembly.

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To start work on the eccentric strap I cut a slice of bronze from the same material I used for the crankshaft bearings and faced off both sides.

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Sometimes I suspect that this material is not bronze but Oilite.  After a surface is machined it always feels damp and slippery.  I remember the guy asking me if I was going to use it for a bearing.

I printed the plan of the eccentric in 1:1 scale, cut it out, and placed it on the bronze disc to have a better idea of what material I have to play around with.

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Lots of material, so it's not going to be a tight squeeze. Then I remembered the third oiler which was meant to be for the eccentric. I must plan for a flat surface on which it will mount.  I scribbled the mounting surface on the plans, which can be seen coloured in on the right.

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I first hacksawed the slice of bronze through the middle.

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Then cleaned out the hacksaw marks by milling both halves together.

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Held both halves on a granite plate with a toolmakers clamp and started marking it out.

DRAWINGS HERE

PART FOUR HERE