Black silicon nitride ceramic blades with tapered ground cutting edges

Application Note

Application Note Ceramic Blades on Abrasive Slitting Lines

This note compares the two ceramic blade bodies we make for converting and slitting duty. It is written from product data and is not an account of a specific customer installation.

The Engineering Challenge

Filled films, glass loaded tapes and foil laminates dull steel blades quickly, and blade changes dominate downtime. Ceramic solves the wear problem but introduces a new question: which ceramic, and at what temperature.

Pain Points This Addresses

Frequent blade changes on abrasive or filled web
Metal pickup contaminating food or medical product lines
Ceramic blades cracking when the line stops and the blade cools quickly

The Specification We Propose

Zirconia blades at 800 MPa flexural strength and Mohs 8.2 are the tough, non-magnetic option for cold cutting, from a minimum of 10 pieces. Silicon nitride blades are the black body for hot cutting: 1200 degree temperature resistance with the thermal shock behaviour that survives a cold restart.

How the Part Is Made

Confirm the web material and whether the cut runs hot
Select zirconia for cold duty or silicon nitride for hot and cycling duty
Match the blade outline, bore and edge angle to the existing holder
Trial from 10 pieces before committing to a full line set

Quality Control

Edge condition and blade thickness are inspected against the drawing before packing, with an inspection report issued on request.

What You End Up With

The blade choice becomes a documented decision based on temperature and duty rather than a trial and error swap, and the trial runs at 10 pieces instead of a full line set.

This note is written from our published product data. It does not describe a named customer project and no client results are claimed.