More than 90% of the spiral bound documents that you see on the market are bound with 4:1 pitch colorcoil binding. However, there are actually several different pitches of colorcoil available for spiral binding. Each of these pitches have specific applications for which they are best suited. This article will provide a quick overview of the major different options for spiral hole patterns and their applications.

4:1 pitch colorcoil is the most commonly used pattern for document and presentation binding. This spiral hole pattern has four holes per inch and is fully compatible with 6mm pitch supplies (primarily used overseas). Four to one pitch color-coil binding is available in sizes from 6mm to 50mm. This type of spiral is the most commonly available spiralcoil binding option and is designed for use with the majority of the smaller spiral-binding machines on the market. This coil binding is easy to work with binding books up to 1 inch thick, however, inserting 4:1 pitch coils on books greater than one inch can be difficult and time consuming.

5:1 pitch coil is the second most commonly used pattern for document and presentation binding. This uses a hole pattern with five holes per inch and is also referred to as 5mm coil-binding. The tighter coils provides a distinctive look and is preferred by some individuals. One common misconception about 5:1 coil is that it provides a stronger more secure bind than 4:1 pitch. This is simply NOT true. The fact that the 5:1 hole pattern places holes closer together than 4:1 makes it easier to tear the pages out on these documents. Still, the tighter spiral binding of the 5:1 pattern provides a distinctive look that some individuals prefer when binding their documents.

3:1 pitch spiral binding is the third most commonly used pattern for document and presentation binding. With three holes per inch, this coil is compatible with both the GBC ProClick and the 3:1 wire binding hole patterns. It is primarily used by individuals who already have a 3:1 punch and wish to add the capability to bind spiralcoil documents. However, large auto punches and inline punches for photocopiers are sometimes sold with a 3:1 pitch die. While providing a look similar to its 4:1 counterpart, 3:1 coil binding is slightly easier to insert since it has less holes to spin through.

The three pitches discussed above are the most commonly used pitches for coil binding. However, coil binding can be special ordered in several other unique pitches. For instance, .400 pitch binding is designed for a hole pattern that has 2.5 holes per inch. This pitch of binding is only available in diameters greater than 20mm or 3/4" and is available in sizes up to 56mm or 2.25". However, the filament size of this is larger than is normally found on other pitches of coil binding, making it more rigid making it easier to insert on larger diameter books. .400 coil is most often used along with a 2:1 pitch wire hole pattern. However, a few companies make specialty dies specifically designed for this pitch of coil binding.

Jeff McRitchie is the designer and Director of Marketing for MyBinding.com He has written over 100 articles on binding supplies binding covers and more.

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