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Tungsten Carbide Milling Insert for Book Binding
A tungsten carbide milling insert for book binding is a small cutter segment used in milling the spine of book blocks so glue can bond properly. These are often called shredder-head inserts or milling head inserts, and they’re made for paper-binding machinery rather than general metalworking Enquire now
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Tungsten Carbide Milling Insert for Book Binding
Tungsten carbide milling inserts for book binding are critical, highly wear-resistant cutting components in post-printing finishing and binding machinery, such as perfect binding lines and wireless binding machines. They are typically mounted on back milling wheels or shredder heads and are used to mill, groove, or roughen the spine of the book before glue application to enhance glue penetration and adhesion strength

Core Applications and Functions
  • Spine milling : Quickly cuts off the back of the folded bookplate, turning the pages into individual loose pages, which facilitates glue penetration.
  • Notching/Grooving : Milling uniform grooves (paper scraps) into the spine of the book to increase the contact area and physical interlocking force of the hot melt adhesive, preventing pages from falling out or breaking. 
Common Specifications and Compatible Models
In post-printing binding, the blades need to be matched according to the different perfect binding line equipment:
  • Common machine dimensions : Common standard specifications on the market include 50×15×3 mm , 65×18×5 mm , etc., which have positioning holes for bolt fixing.
  • Compatible with mainstream brands : These alloy inserts are typically mounted on the milling cutters or end mills of mainstream international perfect binding machines such as Müller Martini, Kolbus, Horizon, and Wohlenberg.
  • Hardness and material grade : The hardness is generally between HRA 87 and 93. Commonly used tungsten carbide grades such as YG6X, YG8, and YG10 are fine-grained cemented carbide. 

Selection and Procurement Guide
  1. Verify the installation method : Choose either screw-fixed (Indexable) or welded type based on the cutter head design. Indexable four-sided blades are recommended as the first choice; once one edge wears out, it can be rotated and reused, offering better overall cost-effectiveness.
  2. Angle matching : When rough milling and with a large depth of cut, it is recommended to choose a slightly larger apex angle to enhance the impact resistance of the blade tip and prevent chipping when facing thick coated paper.
  3. Choose the coating according to the type of paper : When processing high-density coated paper, recycled paper, or paper containing more chemical fillers, you can give priority to blades with wear-resistant coatings to further extend the blade change cycle.

Product Description
 Blades for packing and printing industry
No. Common sizes (mm)
1 72*14*4
2 72*14*9
3 65*18*15
4 63*14*4
5 55*18*5
6 50*15*3
7 50*14.5*4
8 50*14*3.5
9 60*15*2
10 50*16*2
11 50*15*2
12 50*15*1.6
13 50*12*2
14 45*15*3
15 38*15*3
16 32*14*3.7
17 21.2*18*2.8
18 20.8*8*5

Note:  Customization available per customer's drawing or sample.

These blades are widely used in mainstream high-speed industrial-grade perfect binding lines and binding machines worldwide, including but not limited to products from the following manufacturers: Müller Martini: such as Bolero, Corona, Acoro, Tigra, Pony, etc.; Kolbus: such as various models of automatic perfect binding lines and Equalizer back milling systems; Horizon; Wohlenberg.
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