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Create stunningly precise detailed engravings with your CNC router with the Widgetworks diamond drag engraving bit on multiple materials, including plastics (like acrylic), brass, aluminum, steel, glass, and even granite (see the image).

Unlike the standard diamond drag bits, you’ll find on Amazon, this bit is built for industrial use…Literally. It is used by major companies like Campbell’s Soup, General Motors, and even NASA!

This bit can be used on any CNC machine that moves in X, Y & Z, like CNC routers, CNC milling machines, or CNC plasma cutters.

This diamond drag engraving bit has a 1/4 shank and comes with a spring-loaded 120 degree diamond tip.

Instead of rotating and cutting like an end mill, the bit engraves with the spindle TURNED OFF. The spring-loaded, “floating head” style bit applies constant pressure on the diamond tip.

As your CNC machine drags the diamond tip on your CNC project, it creates very precise, permanently engraved lines on the surface of the project.

The bit is designed to compensate for warped material and tables that are not perfectly flat. Engraving pressure is adjustable to match the hardness of the material you are working on.

Comes complete with everything you need to start diamond drag engraving including”

  • Floating-head engraving bit with 120 degree diamond tip
  • High-pressure and engraving springs
  • Low-pressure engraving springs
  • And detailed directions on how to create your cut files, set your bit height / Z=0 level, and recommended feed/speed rates.

We recommend using the 90 degree diamond tip (Sold Separately) for engraving coated materials, such as lacquered brass or anodized aluminum name tags.

The 90 degree tip is also recommended for engravings very fine small details, such as tiny lettering, and thin materials ( < 0.030″ thick.)

Diamond Drag Engraving Bit Technical Specs:

  • Shank Diameter: 1/4″
  • Bit Length: 3 3/4″
  • Engraved Line Width: ~ 0.005″
  • Blade: 120 Degree Tip (Included) or 90 Degree Tip (Sold Separately)

Settings are provided with the diamond drag engraving bit

Made in the USA

(NOTE: No discounts are available on WidgetWorks product)

For Vectric users, get the latest CNC router bit tool database by clicking here

For CNC’s with routers, refer to this PDF download feeds & speeds table


Weight 5 oz
Shank Size


For Materials

Acrylic/Plastics, Aluminum/Brass

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