Stuart Steam Oscillator - Part II

I went to the London Model Engineering Exhibition, and spent an awful lot of money on taps, dies, reamers, knurlers, optical centre punches, marking gauges, indexed tool bits and various other odds and ends. The upshot of this is that I was able to make some progress on my engine. I attached the flywheel with three 8BA grub screws in the pulley instead of a bloody great hole through the main flywheel, I was also able to knurl the adjusting knob. Quick lick of stuart green paint, and it all looks better.

 I really don't like the flat bit on the top of the casting, so I decided to make an oil cup (inspired by John R Bentley in his astonishing post here). First I faced off a bit of brass and drilled a small hole...

 ...then I tapped the tip (5BA) and did some shaping...

Tidied up the end

Parted off....

Screwed the oil cup into an offcut of brass with a 5BA threaded hole, then drilled out the cup. And that's it!

Removed some paint, and drilled a hole - yes, it's a little off, isn't it. Drilling holes is really where the difficulty in all this stuff is...

Finally screwed in the oil cup. It looks a bit eccentric but when the cylinder's attached I think it'll balance out.

Here's a closeup: