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Diamond Cutters
Diamond cutters come in two types:
Conical
Conical Diamond cutters are used to drag across the surface to scribe a line. Conical diamonds can be supplied as a long cutter that fits down through the engraving machine spindle or as a nosecone attachment that is screwed onto the bottom of the spindle. Once the nosecone assembly has been purchased, the diamond cutter can be removed and replaced as a separate part.
Faceted
Faceted diamonds several faces ground into the tip. They are used for burnishing and must be rotated at speed when engraving. They are routinely used for high visibility lines on metals and for glass engraving.

Metal Cutters
Metal cutters can be ground in myriad of different ways for different applications. Shown here are the main catagories that are available.
Tungsten Carbide
Tungsten Carbide is a very hard material that is routinely used for most general engraving applications for engraving metals & plastics.
High Speed Steel
High Speed Steel cutters are less expensive and can be ground to very sharp edges but they do wear much more quickly then Tungsten. They are often used for wood engraving.

Cutter Grinding
D Bit cutters are the most common type of cutter for engraving and cutting metals and plastics. They can be ground in different ways for different applications and can usually be re-sharpened a number of times.

Guide to Cutter Tip Size Selection
Selecting the cutter tip right will give a balanced and attractive look to your engraving and will prevent characters from merging together. As a general rule when engraving using single stroke or pre made multi stroke characters, the tip width required is approximately 12% of the character height.
For example: Character Height 6mm x 12% = Tip width (0.72mm)

Character Height (mm)

1.4

2

3

4

6

8

10

12

15

Preferred tip width (mm)

0.16

0.24

0.36

0.48

0.72

0.96

1.2

1.44

1.8

Use tip reference

A

A

B

C

C

D

D

E

F

Illustration of Effect of Tip Width on Stroke Width