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Related Experiment Videos

Toolmarks made by lathe chuck jaws.

Nir Finkelstein1, Ayal Aronson1, Tsadok Tsach1

  • 1Toolmarks and Materials Laboratory, Division of Identification and Forensic Science, Israel Police Headquarters, Jerusalem, Israel.

Forensic Science International
|April 1, 2017
PubMed
Summary
This summary is machine-generated.

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This study introduces a forensic method to link workpieces to specific lathes by analyzing chuck jaw impressions. This technique aids in identifying the origin of improvised firearm components.

Area of Science:

  • Forensic Science
  • Mechanical Engineering
  • Materials Science

Background:

  • The illicit manufacturing of improvised firearm parts using machining processes is a growing concern.
  • Existing forensic methods may lack the specificity to link manufactured components to the tools used.

Purpose of the Study:

  • To present a novel forensic method for evidentially connecting a workpiece to a specific lathe.
  • To provide a reliable technique for proving or excluding such a connection.

Main Methods:

  • The method relies on the comparative analysis of unique jaw impressions left by a lathe's chuck on a workpiece.
  • Microscopic examination and potentially 3D surface profiling of impression marks.

Main Results:

Keywords:
ChuckForensic scienceImprovised firearmMachiningManufacturing toolmarks

Related Experiment Videos

  • Demonstration of the method's capability to differentiate between lathes based on distinct jaw impression signatures.
  • Successful application in a simulated or actual forensic case scenario.

    • Conclusions:

    • The presented forensic method offers a valuable tool for tracing the origin of machined components, particularly improvised firearm parts.
    • This technique enhances the investigative capabilities in cases involving illicit manufacturing and untraceable firearm components.