Semi-automatic metal nameplate marking machine: This machine uses a high-frequency quenched heat-treated alloy steel character wheel for engraving letters and numbers to a depth of 0.1 to 0.3 mm on metal plates with hand pressure or a rubber hammer. Character wheel content: Includes 40 characters: 26 uppercase letters (A-Z), 10 numbers (0-9), and 4 common symbols (· ×／一) for versatile marking applications. Character wheel parameters: Features a character wheel thickness of 6-8mm, diameter of 80mm, printing depth of 0.1-0.3mm, printing speed of 2-5/10 seconds, and a platform size of 200x135mm for efficient operation. How to select a character wheel: The diameter of the engraving wheel corresponds to the height of printed characters, such as a No. 3 wheel producing 3 mm high characters, ensuring precise and customizable marking. Wide range of applications: Ideal for engraving parameters like model numbers, dates, and serial numbers on metal nameplates in industries such as machinery, automotive, and electrical, suitable for aluminum, copper, and stainless steel materials.