This Norton cutter-grinder which had been specially adapted to grind cams on the motor shaft for the electric dry shaver… https://www.rawpixel.com/image/12307086/image-plant-technology-shapeFree Image from public domain licenseThis Norton cutter-grinder which had been specially adapted to grind cams on the motor shaft for the electric dry shaver… https://www.rawpixel.com/image/12307087/image-plant-person-spaceFree Image from public domain license