Impact vs. Dot-Peen:

The (3) parts provided are challenge to provide a solution as requested:

a) Impact

b) One Fixture

Impact Test:

 

Model: 751

Material: Aluminum

Surface: Cast Rough

Air pressure: 30 PSI

Character Size: 1/4”

Number of characters: 6

Notes: Surface Factor is obvious in this example. Notice how the mark is both dark and

light. The surface is not perfectly flat in the fixture. Part of this is the test fixture scenario

– HOWEVER –  surface configurations will affect the ultimate clarity of the indention mark

Dot-Peen Test

Model: IMM75

Material: Aluminum

Surface: Cast Rough

Air pressure: 30 PSI

Character Size: 1/4”

Number of characters: 6

Notes: The dot-peen system is able to overcome variations in the surface and maintains

a more consistent marked depth.