Diamond Milling Cutter GEKO G37520 — 20 mm, M14 shank, grit 30

Diamond milling cutter GEKO G37520 is a 20 mm diameter rotary tool accessory with an M14 threaded shank and grit 30 abrasive surface. It is intended for grinding, shaping and removing material from hard surfaces such as natural and engineered stone, concrete, terrazzo and ceramic tiles. The tool is compatible with angle grinders and other rotary machines that accept M14-mounted accessories and is designed to deliver steady cutting action and controlled material removal on tough substrates.

Advantages

The diamond-coated cutting edge and medium-coarse grit provide a balance between material removal rate and surface finish, allowing faster stock removal than fine grits while maintaining predictable control. The M14 shank ensures secure mounting in standard angle grinders and rotary tools. Durable diamond segments extend tool life when used on abrasive materials, and the compact 20 mm diameter enables work in confined areas and for detail shaping tasks.

Suitable for

• Grinding and shaping stone and concrete edges
• Profiling and smoothing ceramic and porcelain tile surfaces
• Removing small amounts of material and leveling uneven spots
• Detail work and finishing in tight or hard-to-reach areas

Key specifications

• Cutting diameter: 20 mm
• Shank type: threaded M14
• Abrasive: diamond-coated surface
• Grit size: 30 (medium-coarse)
• Intended materials: stone, concrete, ceramics, terrazzo

How to use

Mount the milling cutter securely in an angle grinder or compatible rotary tool that accepts M14 threads. Ensure the tool is tightened according to the machine manufacturer's instructions and that the grinder is switched off and unplugged during fitting. Wear appropriate personal protective equipment including eye protection, dust mask and hearing protection. Start the machine at a moderate speed and bring the cutter to the workpiece with steady, even pressure, avoiding excessive force. Make multiple light passes rather than attempting to remove large amounts of material in a single pass to prolong tool life and maintain control.

Usage recommendations

Use water cooling or intermittent cutting when working on very hard or abrasive surfaces to reduce heat build-up. Inspect the cutter regularly for wear and replace it when diamonds are significantly worn or cutting performance declines. Follow the grinder manufacturer's safety guidelines and select appropriate rotational speed for the material and grit size.