Standard Linear Impactor Test Method and Equipment Used in Evaluating the Performance Characteristics of Protective Headgear and Faceguards

Topics: General Standard, Pneumatic Ram Method, Test Method

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This standard test method describes laboratory equipment and basic requirements pertinent to pneumatic ram testing of protective headgear with face guards. The concept of the pneumatic ram is to deliver an impact to a helmeted, instrumented, headform on a Hybrid III neck that is free to move post impact. This test method has been designed to subject the headgear to both centric and non-centric impacts while capturing both linear and rotational acceleration. It is believed that compliance with this test method will lead to improved headgear performance. Deviations to this test method will be specified in individual standard performance specifications.


ND081-18m18 Effective Feb. 2019
ND081-18am18 - Revision - Open for Comments
ND081-18am18 Effective Nov. 1, 2019
ND081-18am19 Effective Nov. 1, 2019


Modified May, 2015
Revised February, 2018
Modified May, 2018
Revised July, 2018
Effective November, 2019

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