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CAT NO: DIDACTICNLE-Export-360001
Penetration Tester.
Penetration Tester -
Helmets are subjected to penetration test at two points at a minimum
distance of 75 mm from each other within the area of protection after
being subjected to the process of conditioning which has given the least
satisfactory results in impact absorption test. During this test the
tip of the punch shall not come closer than 5 mm measured vertically to
the head-form.
The Penetration Tester for
helmets consists of an arrangement to hold a head-form on which the
helmet under test is kept. The arrangement has five degrees of freedom
so that any point on the surface of the helmet can be brought under the
point of impact in a manner such that the plane tangential at the point
is substantially horizontal.
A metal punch of a
specified shape and weight guided in a bush is kept vertically above the
point of impact. A metallic weight of specified mass is allowed to drop
on the punch from a specified height. The minimum distance between the
tip of the punch and the head-form at the time of impact is determined
with the help of molding clay.
The complete arrangement
is built over a rigid fabricated steel frame. The tester is finished in
gray hammer tone painting and bright chrome plating to give it a
corrosion resistant finish.
The head-forms used for conducting the test are not supplied with the equipment but are available as optional accessories.
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