Customized 6mm-50mm 4:1 Pitch Spiral Plastic Coil For Book Binding

Brand Name:Sudi
Certification:ROHS , SGS , CPST
Model Number:1/4"-2"
Minimum Order Quantity:1500 pieces
Delivery Time:5-15 days
Payment Terms:T/T, L/C, D/P, Western Union, MoneyGram
Contact Now

Add to Cart

Verified Supplier
Location: Dongguan Guangdong China
Address: Room 202, Building 1, No. 93, Chawen Road, Chashan Town, Dongguan City, Guangdong Province
Supplier`s last login times: within 13 hours
Product Details Company Profile
Product Details

Customized 6mm-50mm 4:1 Pitch Spiral Plastic Coil For Book Binding


Company Profile.pdf


Coil binding

  • Spiral-bound plastic coils are one of the most popular traditional binding methods. They consist of a continuous helical coil made of durable and flexible plastic. For binding, these helical coil binding ridges are passed through several closely spaced holes and then curled around the edges. They allow your pages to flip front to back and are very flexible and durable so they spring back to their original shape even after heavy use and bending. This makes them the best binding solution for all kinds of textbooks, calendars, weekly calendars, and more.
  • The biggest advantage of the spiral plastic coil is that its color is richer than the metal spiral coil. There is no limit to the number of plastic spiral coils, and the price is more favorable than metal spiral coils and Wire-O Binding.
  • Plastic spiral coils are available in two materials, PVC and PET, the former is more affordable and the latter is higher quality.
  • Spiral-bound coils offer a more modern and durable way to bind books on traditional comb spines. One of the advantages of spiral-bound coils over many other binding methods is that coil-bound books are able to turn pages 360° without Damage content so they can lay flat and stay flat.
  • Please note that we are the manufacturer and all products support customization, helical coils can be implemented in other packages than spools.

Our advantage

Factory direct sales, no middlemen involved, our prices are very affordable, and the quality can be guaranteed.


How to choose a spiral coil?
You can choose your spiral plastic coil size according to the reference values in the table below. If you know the total thickness of the book to be bound, you can directly correspond to the binding thickness value in the table below.



Size (Millimeter)Size (Inches)Stack Capacity (Inches)Sheet Capacity* (20 lb. Bond)Filament Diameter
6mm1/4"5/32" Thick Stack5-35 Sheets1.6mm
7mm9/32"3/16" Thick Stack36-47 Sheets1.6mm
8mm5/16"1/4" Thick Stack48-60 Sheets1.6mm
9mm23/64"9/32" Thick Stack61-70 Sheets1.75mm
10mm3/8"5/16" Thick Stack71-80 Sheets1.75mm
11mm7/16"3/8" Thick Stack81-90 Sheets1.75mm
12mm1/2"13/32" Thick Stack91-100 Sheets1.75mm
13mm17/32"7/16" Thick Stack101-110 Sheets2mm
14mm9/16"15/32" Thick Stack111-120 Sheets2mm
15mm19/32"1/2" Thick Stack121-130 Sheets2mm
16mm5/8"9/16" Thick Stack131-140 Sheets2mm
17mm0.67"0.55" Thick Stack141-150 Sheets2mm
18mm23/32"5/8" Thick Stack151-160 Sheets2.08mm
19mm0.748"0.62" Thick Stack161-165 Sheets2.08mm
20mm3/4"11/16" Thick Stack161-170 Sheets2.08mm
22mm7/8"3/4" Thick Stack181-200 Sheets2.08mm
23mm9/10"4/5" Thick Stack201-210 Sheets2.08mm
25mm1"13/16" Thick Stack211-230 Sheets2.36mm
28mm1-1/8"7/8" Thick Stack231-250 Sheets2.36mm
30mm1-3/16"1" Thick Book251-270 Sheets2.36mm
32mm1-1/4"1-1/16" Thick Stack271-290 Sheets2.36mm
35mm1-3/8"1-1/4" Thick Stack291-300 Sheets2.36mm
38mm1-1/2"1-3/8" Thick Stack300-320 Sheets2.4mm
40mm1-9/16"1-1/2" Thick Stack321-350 Sheets2.4mm
45mm1-3/4"1-9/16" Thick Stack351-390 Sheets2.4mm
50mm2"1 -3/4" Thick Stack391-440 Sheets2.6mm

If you want an alternative solution to choose the best size, you can utilize this general rule of thumb:

  1. Take the pages and covers being bound and lay the stack flat on a table.
  2. Measure the thickness of the stack, but don’t press down; let it lay naturally loose.
  3. Add 1/8" to the stack thickness - that will be the size of the binding coil recommended for your document thickness.


If still not clear?


  1. If you are still not sure how to choose the appropriate size, spacing and length, please contact us (luo@sudidg.com WhatsAPP+86-17722306989)
  2. We are a factory without middlemen, so you don't have to worry about the price. The quality can only be shipped after passing the strict inspection of the internal quality inspection department, and each of our products has passed the environmental protection certification, please rest assured to buy.

We offer spiral plastic coils in various colors that can be used to make your spines.


FQA :


Q: Are you a trading company or a factory ?

A: We are a factory but not a trading co. .


Q: Do you provide sample?

A: Various samples are available , freight cost is on your side .


Q: How long can I expect to get samples?

A: After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 1-2 days. The samples will be sent to you by express.


Q: What kind of color do you have ?

A: We can do products according to pantone color.


Q: What are your terms of payment?

A: 30% deposit, 70% balance before delivery. 30% deposit, the balance L/C. 100% in advance. Western Union/Paypal.


China Customized 6mm-50mm 4:1 Pitch Spiral Plastic Coil For Book Binding supplier

Customized 6mm-50mm 4:1 Pitch Spiral Plastic Coil For Book Binding

Inquiry Cart 0