This is a hand-operated valve lapping tool made by Albertson &Co. of Sioux City IA. in the 1920s. Sometime in it's past the wooden knob on the top has been replaced with a brass one which I am keeping because I like it. Otherwise I am returning it to it's original state using the finishes it would have had from the factory.
All the bright metal was electroplated with nickel, the brass knob polished, the wood knob sanded then treated with boiled linseed oil.
The body was media blasted and then finished using the ancient process of Japanning. The mix of Japan Black and sequence of heat cycles I used are from Hand Tool Rescues video on Japanning.
At the end I use the tool to lap in the intake valve on an old Briggs and Stratton engine so you can see how it works.
Негізгі бет Restoration of antique Sioux Albertson & Co. Valve grinding tool with Electroplating and Japanning
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