Brand New Engineers Hand Scraper Size100mm (4 Inches) Triangular
Engineers Hand Scraper TRIANGULAR
Size: 100mm (4inch)
Application: A hand scraper is a single-edged tool used to scrape metal from a surface. This may be required where a surface needs to betrued, corrected for fit to a mating part, needs to retain oil (usually on a freshly ground surface), or even to give a decorative finish.
Surface plates were traditionally made by scraping. Three raw cast surface plates, a flat scraper (as pictured at the top of the image) and a quantity of bearing blue (or Red Lead) were all that was required in the way of tools.
The scraper in the center of the image is a three corner scraper and is typically used to deburr holes or the internal surface of bush type bearings. Bushes are typically made from bronze or a white metal.