johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment. I read every comment and respond to most. n.b. There is a list of my first 800 posts in my post of 17 June 2021, titled "800 Posts"
Image | April 9, 2014

Bolton 7 Gunmetal castings

Castings used to make the Bolton 7 engine. These are a hard wearing brass alloy called gunmetal. The next post is a picture of the cast iron castings.
Part of the expertise in making these engines is the technical challenge of accurately machining these lumps of metal.

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Image | April 9, 2014

Bolton 7 Iron castings

A lot of people who see my engines do not know what castings are, so here is a photo

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Image | April 9, 2014

John in Istanbul

The chain of the Golden Horn.
At least 600 years old. Forged by hand.
ancient or at least medieval, metalworking

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