Interchangeable Steel Type usually refers to the steel characters, letters, numbers, or symbols that can be swapped in and out on manual or semi-automatic coding machines, hot stamping machines, and some industrial printers.
What is Interchangeable Steel Type?
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These are individual steel punches or characters that you arrange on a holder (called a type holder or type chain) to form words, dates, batch codes, or other data.
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The steel types are replaceable and reusable, so you can change the printed content easily without replacing the whole print head or cartridge.
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Often used in hot stamping or manual coding machines like the HP‑241, MY‑380, or similar devices.
Key Features
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Material: Usually made of high-quality hardened steel for durability and sharp imprinting.
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Sizes: Vary in height (e.g., 3mm, 5mm, 8mm) and width depending on the machine and font style.
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Fonts & Styles: Can be numeric, alphabetic, or symbols; sometimes special characters like Chinese or logos.
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Mounting: Held securely on a base plate or chain that feeds through the coding machine.
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Interchangeability: Types can be removed and rearranged manually for different print jobs.
Advantages
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Flexibility: Easy to change messages, dates, or codes on the fly.
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Cost-effective: No need to buy a new stamp for each change.
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Durability: Steel types last long even with repeated heating and stamping.
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Clear Prints: Produce sharp, consistent imprints.
Common Applications
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Date coding and batch numbering on packaging.
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Lot or serial number printing.
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Logo or symbol stamping.
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Manual marking in factories with changing product info.
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