17mm Spiral Binding Coils

No. These 17mm coils are made for 4:1 pitch spiral coil binding, so they must be used with a 4:1 pitch punch pattern. Diameter and pitch are not the same thing. The 17mm size tells you the coil capacity, while 4:1 pitch tells you the spacing between coil turns and punched holes. A 4:1 coil will not feed correctly through a 5:1 punched document. The coil length also matters. These coils are 12 inches long, which is commonly used for letter-size binding and then trimmed and crimped after insertion. For pitch planning, review spiral coil binding supplies by pitch before buying multiple boxes.

Move up from 17mm coils when the full stack approaches the capacity limit or when the sheets do not turn freely in a test bind. Covers, tabs, coated inserts, and heavier paper can make the document thicker than the sheet count suggests. A coil that is too small can pull against the punched holes and make the book hard to open. It may also look compressed along the spine. A slightly larger coil is usually better than forcing a tight fit, as long as the finished book does not look loose. For repeat jobs, keep a sample record showing paper weight, cover style, sheet count, and coil diameter. That prevents size mistakes on future runs.

Color matters for presentation and sorting, not for machine fit. These 17mm coils are available in multiple colors, including black, blue, burgundy, clear, green, gold, navy, red, silver, and yellow. Black and clear are common neutral choices. Blue, red, green, gold, or other colors can separate departments, training levels, subjects, manuals, or client sets. Choose the diameter and pitch first, then choose the color that matches the cover and document purpose. If several manuals look similar, color coding can reduce filing and distribution mistakes. For broader color planning, compare spiral coil binding supplies by color against the cover stock before ordering.

A coil must extend past the document edge during insertion so it can feed through every punched hole. After insertion, both ends need to be trimmed and crimped. Crimping bends the coil ends back so the coil cannot spin out of the document during use. It also removes loose ends that can catch on other books, bags, or shelves. These 17mm coils are 12 inches long, so they are suitable for common letter-size binding and finishing. The exact amount removed depends on the document edge and operator technique. Skipping the finishing step can make an otherwise correct coil order fail in daily handling. Always plan for crimpers when stocking coil supplies.