Diamond Drag CNC Engraving Bit, Pro Grade for Metal Glass Stone Acrylic, 1/2” Shank

Professional-grade diamond drag engraving bit for CNC routers, mills, and plasma cutters delivers crisp engraved detail on a wide range of materials — including metals (brass, aluminum, steel, stainless steel), glass, stone, granite, and acrylic.

Unlike standard diamond drag bits found on Amazon, this 1/2" shank industrial-grade CNC engraving bit is trusted by major manufacturers — including Campbell’s Soup, General Motors, and NASA — for high-precision engraving.

Designed for any CNC machine with X, Y & Z motion — including CNC routers, CNC milling machines, and CNC plasma cutters — this CNC engraving bit produces clean engraved lines. Its spring-loaded “floating head” applies consistent pressure to the diamond tip, automatically compensating for warped materials or imperfect tables.

How it works:

• The spindle remains OFF during engraving.
• The diamond tip is dragged across the surface, leaving precise, crisp engraved lines on your CNC project.
• Adjustable engraving pressure allows perfect results across materials of varying thickness.

Includes everything you need to start engraving:

• Floating-head diamond drag engraving bit with replaceable 120 ° diamond tip
• High-pressure springs for harder materials
• Low-pressure springs for softer materials and fine engraving
• Detailed instructions for tool setup, Z-zeroing, feed rates, and cut file creation

For coated materials (such as lacquered brass or anodized aluminum name tags) and fine detail work (tiny lettering or thin materials under 0.030” thick), we recommend using the optional 90° diamond tip (sold separately).

Recommended feed, speed, and depth settings are included with your engraving bit.

SKU: ED-14

Item SKU: ED-12