Spiral Printing Knowledge (original) (raw)

A spiral binding consists of a continuous wire, which is coiled through evenly spaced holes that have been punched into the pages of a book. The spiral wire can be made of metal, plastic, or plastic coated metal. Plastic is available in a variety of colors, but the metal spiral has a limited color selection. When the books are open, the pages lie flat. The pages can also be folded over completely, which makes spiral binding a good choice for training manuals, cookbooks, notebooks, and calendars.

Diameter Guide for Spiral Binding The examples below are based on booklets consisting of 20 lb. bond pages with heavy weight covers on the front and back.
Number of sheets Approx. thickness including covers Coil diameter
30 (60 pages) 1/8" 6 mm
40 (80 pages) 5/32" 7 mm
50 (100 pages) 3/16" 8 mm
60 (120 pages) 7/32" 9 mm
70 (140 pages) 9/32" 10 mm
80 (160 pages) 5/16" 11 mm
90 (180 pages) 11/32" 12 mm
100 (200 pages) 3/8" 13 mm
110 (220 pages) 7/16" 14 mm
125 (250 pages) 1/2" 16 mm
140 (280 pages) 9/16" 18 mm
160 (320 pages) 5/8" 20 mm
180 (360 pages) 11/16" 22 mm
210 (420 pages) 13/16" 25 mm
230 (460 pages) 15/16" 28 mm
250 (500 pages) 1" 30 mm
265 (530 pages) 1-1/16" 32 mm