3:1 Pitch Spiral Binding Coil - 100pk
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3:1 Pitch Spiral Binding Coil - 100pk

Part #: SPCOIL31
Brand: MyBinding
6 Questions, 6 Answers
  • Length: 12" Letter or 36"
  • Pitch: 3:1 (3 Holes Per Inch)
  • Hole Pattern: 32 Hole
  • Quantity: 100 Per Box
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Product Description

Use this 3:1 pitch binding coil along with your Proclick Binding Machine or your 3:1 Pitch Wire Binding Machine . This coil will provide the same look and feel that you get with the more common 4:1 pitch coil and is available in sizes from 6mm (1/4") up to 50mm (2"). It is an excellent binding option for reports or documents that are frequently mailed or handled because of its durability. MyBinding.com currently offers 3:1 pitch coils in more than 45 different colors, and we can even provide custom color matching services for larger jobs. Check below for a list of sizes and approximate capacities. Plus, you might also want to read our article on Using 3:1 Pitch Coil with a Proclick Binding Machine.
Please Note that most of our 3:1 pitch coil is made to order, is non-returnable, and can take an extra 2-3 business days to ship. If you need this product in a hurry, please give us a call for options before ordering.

Note: custom lengths are available and should call for quote.

Product Details

  • Product Type: 3:1 Pitch Coil Binding Spines
  • Color: Various (45 Choices Available)
  • Diameter: Various (Available from 6mm - 50mm)
  • Pitch: 3:1 (3 Holes Per Inch)
  • Length: 12" Letter or 36"
  • Quantity: 100 Per Box

Demonstration Video

Transcript: Welcome to MyBinding video. This is everything you need to know about spiral coil. First, there are sizes ranging from a 6mm diameter all the way to 50mm. The smallest size can hold up to 30 pages and the largest can hold up to 444. A great benefit to spiral coil is that the pages lay flat. Better yet, they fold nicely back to back and the choices of color is one of the largest in any type of binding. Standard size coil has a 4:1 pitch, which is compliant with its respected hole punches. The standard length of each coil is 12 inches. Coil should always be longer than the pages you're binding. ... Read More
Welcome to MyBinding video. This is everything you need to know about spiral coil. First, there are sizes ranging from a 6mm diameter all the way to 50mm. The smallest size can hold up to 30 pages and the largest can hold up to 444. A great benefit to spiral coil is that the pages lay flat. Better yet, they fold nicely back to back and the choices of color is one of the largest in any type of binding. Standard size coil has a 4:1 pitch, which is compliant with its respected hole punches. The standard length of each coil is 12 inches. Coil should always be longer than the pages you're binding. There are also custom lengths up to 36 inches. With the extra length on each end, you finish off your book with special wire cutting crimpers. Once you're done, you'll have yourself a spiral coil bound book. For more demos, reviews and how-to's, go to MyBinding.com.

Coil Sizing Guide

Coil Diameter Fractional Equivalent (approx.) Maximum Thickness of Document including Covers Sheet Capacity (20# Bond)
6mm 1/4" 4mm - 5/32" 30
7mm 9/32" 5mm - 3/16" 42
8mm 5/16" 6mm - 7/32" 54
9mm 11/32" 7mm - 1/4" 65
10mm 3/8" 8mm - 5/16" 75
11mm 7/16" 9mm - 11/32" 85
12mm 15/32" 10mm - 3/8" 92
13mm 1/2" 11mm - 13/32" 105
14mm 9/16" 12mm - 7/16" 115
15mm 19/32" 13mm - 1/2" 125
16mm 5/8" 14mm - 17/32" 135
17mm 21/32" 15mm - 9/16" 142
18mm 11/16" 16mm - 5/8" 155
19mm 23/32" 17mm - 11/16" 160
20mm 3/4" 18mm - 23/32" 172
22mm 7/8" 20mm - 3/4" 190
23mm 15/16" 21mm - 27/32" 200
25mm 1" 22mm - 7/8" 220
28mm 1-1/8" 25mm - 1" 250
30mm 1-3/16" 27mm - 1 1/16" 270
32mm 1-1/4" 29mm - 1 1/8" 280
35mm 1-3/8" 32mm - 1 1/4" 310
38mm 1-1/2" 34mm - 1 5/16" 330
42mm 1-11/16" 38mm - 1 1/2" 350
45mm 1-3/4" 41mm - 1 5/8" 390
50mm 2" 46mm - 1 13/16" 440

Questions & Answers

Unfortunately, we do not offer a variety pack of colors or sizes on the 3:1 Pitch Spiral Binding Coil - 100pk.

Answered by MyBinding
4 years and 7 months ago ago
The Special coil is made of plastic. We do not have spiral coil in the metal coil at this time. We do have 3:1 wire but it is only meant to be bound with a 3:1 machine. If you need assitance with supplies, please contact us at 800-944-4573 and we would be happy to help.

Answered by Mybinding.com
4 years and 9 months ago ago
That is a great question, but unfortunately, they are not available in smaller quantities.

Answered by MyBinding Rep
5 years and 10 months ago ago
Thank you for your question. Unfortunately there is not a coil large enough to accommodate a 800 page book. The largest coils 50mm (2") in diameter which can hold up to 440 sheets of 20# paper.

Answered by MyBinding
6 years and 2 months ago ago
Unfortunately this coil has a 3:1 pitch(3 holes per inch) and will not work with a standard coil binding machine. 4:1 pitch is the standard punching pattern used by most coil binding machines in the USA.

Answered by MyBinding.com
7 years and 4 months ago ago
Thank You for your question. For 25 sheets of 38# pound paper you would want to use a 3/8" diameter 3:1 spine. For a complete breakdown of the capacities of the different sized spine please refer to our Sizing Guide .

Answered by MyBinding
7 years and 7 months ago ago

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