Versitron Operation Manual 9
3.0 TEST METHOD
3.1 ASTM E18: Rockwell Hardness Testing
This tester operates according to ASTM E18 standard in all particulars. It is used by
virtually every large automotive, aerospace and defense manufacturer in the nation.
3.2 Top-loading and Test Surface Referencing
The Versitron has two unique features: top-loading and test surface referencing. At
the start of the test the entire indenter descends approximately 3/32” to contact the
test specimen surface. As the preload and full loads are applied, the indenter
shroud contacts the specimen surface.
This shroud establishes a reference point against which the depth of penetration is
compared.
This feature reduces or eliminates the effects of deflection of the test stand and
specimen under load. With standard testers, deflection in the specimen, elevating
screw, or the frame components invalidates the test.
Furthermore, a clamping shield can be used to firmly fix a specimen into position
without special fixturing. Since the clamping shield is fixed to the test stand
independently of the test head which holds all the measuring and loading
components, there is no effect on the test results.
Indenter Area detail
Clamping Shield
Indenter Shroud
Indenter
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