Bottom knives play a fundamental role in the operation of slitters and machines in general.
These components are typically mounted on the lower shaft of the machines, strategically positioned to interact with the upper knives or main blades.
In particular, they provide a stable and resistant surface against which the blade “works” to cut the material.
This process, commonly called shear cut, allows a precise and clean cut, ensuring a high-quality result.
In addition, questi coltelli can be adjusted or replaced to suit different types of materials or cutting requirements.
This flexibility makes machines suitable for a wide range of applications: from the paper and cardboard industry, to converting, fabric production and much more.
Showing all 7 results
Saucer bottom knives
As essential components in cutting machines, bottom knives can be secured in various ways depending on the needs of the application.
Securing methods include:
- Smooth hole blocking (free locking)
- Self-locking
- Screw locking
- Multilock securing (screw + ring)
The choice of securing method depends on the machine type, the material to be cut, and the specific needs of the application.
Bottom knives maintenance by Negri Lame
- Free locking: sharpening of the cutting edge only.
- Screw locking: replacement of screw locking and sharpening.
- Self-locking: replacement of eccentric ring + balls and sharpening.
