When a part requires a permanent, one-of-a-kind mark — whether it tracks a research animal, a forged component, or an injection-molded assembly — hot stamping steel type is often the most direct path to a reliable solution. The mark is indelible. The process is repeatable. And the tooling holds up through long production runs without sacrificing impression quality.
American Calan, a manufacturer of agricultural monitoring and feeding systems based in Northwood, NH, learned this firsthand when their original dies and steel type were lost. What looked like a crisis turned into an upgrade.
What Is Hot Stamping Steel Type and How Does It Work?
Hot stamping steel type is a direct marking method that uses heated, hardened tool steel characters pressed into a material surface to create a permanent impression. The process requires three elements: a hot stamping press with a heating element, a custom die holder loaded with individual steel type characters, and the part to be marked. When the press engages the heated type against the surface, it leaves a crisp, deep, permanent mark.
Unlike inkjet or label-based marking, there is nothing to fade, peel, or smear. The mark is physically part of the material. That matters enormously in applications where a part will move through a production line, get handled repeatedly, or endure environmental exposure over years of use.
Steel type is made from hardened and tempered tool steel, which is what separates it from softer alloy options. Brass type works well for leather, book bindings, and light plastics. Steel is the right call when you are marking harder plastics, running high volumes, or need the tooling to hold up without frequent replacement.
Why Do Agricultural Research Systems Require Unique Part Marking?
Agricultural research centers use electronic monitoring systems to track individual animals — what they eat, how much they eat, and which feeding stations they can access. Each animal carries a unique RFID-enabled key that ties the monitoring system to that specific animal. For the system to work reliably, every key component must carry a unique, permanent identifier that cannot be confused, duplicated, or lost.
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American Calan designs and builds those feeding and data collection systems. Their electronic feeding stations grant access to specific animals based on RFID identification, and they monitor consumption at the individual level. The nylon key worn around each cow's neck is a critical piece of that chain. Each half of the hollow key must be permanently marked with a unique identifier before the RFID device is installed inside.
A 40-year-old handheld hot stamper is still the tool of choice for this job. That says something about the reliability of the process. The press heats a custom die holder loaded with steel type, presses it into the injection-molded nylon, and leaves a mark that will outlast the key itself.
Doug Briggs, President of American Calan, describes what happened when their original tooling was lost: "When our old dies, and steel type was lost, we were forced to find a replacement for an old and unique system. We found Durable Technologies online, and within a few weeks, we had all of the dies and steel type replaced. We were very impressed with the knowledge of our application and response times from the Durable Technologies team. Our original type was made from brass, but Durable suggested we use steel type because it was easier to get in a rush and seems to work even better than the brass."
Why Choose Steel Type Over Brass for Marking Harder Plastics?
Steel type outperforms brass when the marking surface is a harder plastic, when production volumes are high, or when replacement costs need to stay low over time. Hardened and tempered tool steel holds its edge through far more impression cycles than brass, which means the mark quality stays consistent longer before the type needs replacing.
Brass type is an economical and capable choice for leather goods, book bindings, paper, and softer plastics. It produces a cleaner mark than softer alloy metals like zinc or lead, and handles heat and pressure well at moderate production volumes. But when the material pushes back — injection-molded nylon, polycarbonate, ABS, or other engineering-grade plastics — brass wears faster, and the impression quality degrades sooner.
The total cost of ownership argument usually favors steel in these applications. The upfront cost is modestly higher, but the tooling lasts significantly longer. For a production line marking hundreds or thousands of parts, that difference adds up quickly. American Calan's experience is a clear example: Durable Technologies recommended steel as a direct replacement for their brass type, and the results were immediately better.
What Industries Depend on Steel Type for Part Traceability?
Agricultural research equipment is one application. The list of industries that rely on hot stamping steel type for permanent identification goes much further.
Steel mills, forging operations, and foundries use slotted steel type in heavy-duty type holders because the marking conditions are extreme. Parts come off the line hot, rough, and hard. The type has to keep up. Slotted-style steel type, through-hardened for maximum durability, is built specifically for these environments.
Automotive and aerospace manufacturers mark components for traceability throughout the supply chain. A part number stamped into a component at the point of manufacture remains readable at every stage of assembly, inspection, and service. When a part fails in the field, that mark is often the only way to trace it back to its origin.
HVAC manufacturers use steel stamping dies to add identification marks to sheet metal parts destined for large commercial systems. Electronics manufacturers mark housings and enclosures. Electrical contractors use hot stamping type to mark wire and heat-shrink sleeving with circuit identifiers. Even the bookbinding and personalization markets use steel type for longer production runs, where brass would wear too quickly.
The common thread across all of these is simple: the mark has to be permanent, the process has to be repeatable, and the tooling has to hold up. Steel type checks all three boxes.
How Do You Replace Lost or Obsolete Hot Stamping Dies?
Replacing lost or legacy hot stamping tooling is more straightforward than most manufacturers expect. The key is working with a supplier who can reproduce the original character set, match the die holder dimensions, and turn the order around quickly enough to minimize production downtime.
American Calan had its full set of dies and steel type replaced within a few weeks of contacting Durable Technologies. That timeline mattered. A system that tracks and feeds research animals cannot sit idle while tooling is on back order.
Durable Technologies manufactures steel type for a wide range of OEM impact presses, including GT Schmidt, Pannier, Matthews, Hilti, Columbia, and Automator, among others. Standard character sizes are available in both slotted and utility configurations, with custom sizes available when the application demands it. Type holders are available in press-shank style for use with impact presses or in handheld versions for use with a striking hammer.
The process starts with understanding the application: what material is being marked, what character size is required, what type holder configuration is in use, and what production volume the tooling needs to support. From there, Durable Technologies can recommend the right type of configuration and material, provide a digital proof, and manufacture the tooling to specification.
Whether you are replacing a 40-year-old system or specifying new tooling for a current production line, the path to a reliable, permanent mark starts with matching the right type of material and configuration to your specific part and process.
