
GKM2: Glass Knife Maker
The GKM2 glass knife maker produces the most reproducible straight-edged glass knives available. With its balanced break methodology coupled with a pressure detector readout for precise reproducibility of breaking pressure, the GKM2 is the favoured knifemaker for many laboratories.
Manufacturer
RMC Boeckeler
Boeckeler Instruments engineers sample preparation equipment for nanoscale research, under the RMC Boeckeler product line. Their solutions are employed in both life sciences and materials research, with special emphasis in sample preparation for 3D electron microscopy.

Key Features
- Solid, heavy design
- Easily produces consistent, controlled breaks
- Digital readout displays load applied to glass as breaking arm is moved
- Produces knives up to 12mm wide
- "Balanced Break" method for the sharpest knives
- Precision micrometre positioners
- Built-in mechanical stops for easy positioning
- Precision mechanism supports "Slow-Break" technique

Overview
The harder embedding media needed to support the tissue during the sectioning process and subsequent observation in the electron microscope necessitates a blade that is precise and robust enough to cut the very thin sections on the ultramicrotomes. Freshly broken glass with its super sharp edge provides an excellent solution for cutting the ultra-thin sections necessary. In addition, the glass knife is preferred for teaching, trimming, and for those unknown samples which may have inclusions that can instantly damage your diamond edge.
The pressure sensor and digital display enable the operator to produce accurate knives with each controlled break. Precision micrometres accurately position glass squares for the final break into knives.
Downloads

GKM2 Datasheet
Service Support
Comprehensive repairs and servicing
Annual Support Programs
Your metrology instrumentation is a major investment that is critical to your business operation and success. In today’s competitive climate, it is more important than ever to extend the functionality and peak performance of your metrology equipment years beyond the expiration of your factory warranty. CN Tech’s Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.
With over 20 years’ experience servicing and repairing you can be assured that your system is in safe hands. The independent services we offer include system relocation, maintenance visits, parts and consumables, and break down interventions.
CN Tech’s Support Programs are an economical way to guarantee optimal working condition:
- Annual Preventive Maintenance
- Priority Technical Assistance
- Preferred Parts Availability
- On-Site User Training
- Remote Diagnostics
- No surprise repair expense and much more!
Support Contact Example
An example of our service and support contracts are shown below:

Metrology & Instrumentation Annual Support Programs 2022/23
CN Tech's Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.