If you’re involved in security, access control, or even just carry a credit card, you’re likely familiar with the standard size of ID cards. Often referred to as “CR8030,” this size is the norm for everything from your bank cards to corporate access badges and membership passes. The “CR80” designation refers to the physical dimensions, measuring 3.370 inches × 2.125 inches (85.60mm × 53.98mm), with rounded corners at a radius of 2.88 to 3.48 mm.
But when it comes to Identity Key Fobs, and the cards or inserts they house, thickness becomes just as crucial as size. Have you ever considered the thickness of the card within your key fob? Or why some key fobs feel more robust than others? This guide delves into the world of ID card thickness, measured in “mils” (thousandths of an inch), and how it applies to your identity key fobs and access solutions.
What is “Mil” in Card Thickness?
Thickness for ID cards, and by extension, the cards used in many identity key fobs, is measured in “mils.” One mil is equivalent to 0.001 inch. Understanding mil thickness is essential because it directly impacts the durability, printer compatibility, and overall functionality of your identity key fob.
Common Card Thicknesses and Their Applications for Identity Key Fobs
While keyfobx.com offers a range of card sizes (CR79, CR80, CR100) in various thicknesses, let’s focus on how different thicknesses relate to identity key fobs and access control:
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10-mil and 13-mil Cards: Not Ideal for Standard Identity Key Fobs
These thinner cards, often used for business cards or temporary membership cards, are generally too flimsy for regular use within an identity key fob. While they might fit, they lack the durability needed for daily handling and are more prone to bending or damage inside the fob. Furthermore, if you intend to print on cards for your key fobs, be cautious. 10-mil cards, and sometimes 13-mil cards, can cause issues with certain ID card printers, particularly retransfer or laminating printers, potentially damaging the printer head. Always check your printer specifications before using these thinner cards.
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20-mil Cards: Consider for Specialized, Less Frequent Use Key Fobs
Slightly thicker 20-mil cards offer a bit more rigidity. They might be used for specific, less frequently handled identity key fobs, perhaps for visitor access or temporary passes. However, their compatibility with card printers can still be a concern. Always verify your printer’s specifications to ensure it can handle 20-mil cards without feeding problems.
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30-mil Cards: The Industry Standard for Robust Identity Key Fobs
This is the workhorse thickness for most identity key fobs and access control systems. 30-mil cards strike the perfect balance of durability and functionality. They are robust enough to withstand daily use within a key fob, resisting bending and damage, while still being compatible with the vast majority of ID card printers. Think of your standard credit cards, debit cards, corporate ID badges, and university access cards – these are typically 30-mil. For reliable, long-lasting identity key fobs, 30-mil cards are the recommended and most common choice.
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55-mil, 60-mil & 65-mil Cards: Thick Cards for Specialized Key Fobs and Clamshell Proximity Applications
These significantly thicker cards are less common for standard printable ID cards but are relevant in the context of identity key fobs and access control. 55-mil cards, while less frequently printed on directly (specialized printers like the EDIsecure XID 9300 are needed), are sometimes used for very durable applications, like luggage tags or award cards that might be incorporated into a unique key fob design.
60-mil and 65-mil cards often refer to “clamshell” proximity cards. These are thicker, more rigid cards commonly used in identity key fob systems, particularly for access control in organizations with high employee turnover. The thickness provides extra durability for frequent use in access readers. While you might not print directly onto these very thick cards, they are often pre-printed or contain embedded technology within the clamshell casing, forming a robust identity key fob solution.
Choosing the Right Thickness for Your Identity Key Fob
Selecting the appropriate card thickness is crucial for creating effective and reliable identity key fobs. Consider these factors:
- Intended Use: For standard access control and daily carry key fobs, 30-mil is the optimal choice. For less frequent use or specialized applications, you might consider slightly thinner or thicker options.
- Durability Requirements: If your key fobs will endure heavy use or harsh environments, 30-mil or thicker cards are recommended.
- Printer Compatibility: If you plan to print cards for your key fobs in-house, always check your ID card printer’s specifications to ensure compatibility with your chosen card thickness.
- Key Fob Design: The design of your identity key fob itself might influence the ideal card thickness. Some fobs are designed for standard 30-mil cards, while others might accommodate slightly different thicknesses.
Conclusion: Thickness Matters in Identity Key Fobs
While the CR80 size provides the standard dimensions for cards used in identity key fobs, understanding card thickness is equally important. Choosing the correct thickness ensures durability, printer compatibility, and the overall effectiveness of your access control and identification systems. For most identity key fob applications, 30-mil cards offer the best balance of performance and reliability. When considering your next access control solution or identity key fob project, remember that thickness is a key factor in creating a system that is both secure and user-friendly.
