Here we are looking at the types of pitches of binding supplies - wire binding and coil binding for example.

“Pitch” means: Holes Per Inch. For example: if you have a 2:1 pitch, that means there are two holes along the spine of your project for every inch. One of the main things to look for when comparing pitches is to look at how large the bindings are. With 2:1 twin loop wire there are options to fit up to 230 sheets (1 ¼” spines). The 3:1 wire only supports spines up to 9/16” in colours (about 90 sheets) and 5/8” in black (about 110 sheets). So, in this example, if you are going to create larger projects you wouldn’t want to purchase a 3:1 machine.

Wondering what pitch is used by each binding style.  Here is a quick cheat sheet for reference.

Coil - 4:1 is the most common (5:1, 3:1, 2.5:1, and 6mm are available)
Wire - 3:1 for smaller sizes and 2:1 for larger sizes
Velobind - 1:1 (one hole per inch)
Plastic Combs - 9/16” hole spacing (19 rectangular holes on an 11” document)
Spiral-O Wire – same whole pattern as Plastic Combs


Our Recommendation:

Go with a pitch that will work with the size of projects you think you’ll be making.  If you need something smaller or larger than what you choose, then purchase some prepunched paper and a small box of another pitch size for those few projects and bind them using the same machine.


Key Points:
  1. “Pitch” means holes per inch.
  2. When choosing a pitch, choose the ones you think will best fit your sized projects.
  3. Purchase prepunched paper of another pitch and a small box of binding spines for those few projects that differ in size from your average project.