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How to Maintain Joint Integrity When Converting from Metal to Plastic

Publisher: SPIROL International Corporation
Discussing how the joint integrity of an assembly can be maintained while converting from metal inserts to plastic, this paper points that tensile strength, rotational torque, and pull-through strength are the typical performance requirements of an assembly. It lists the factors which affect the insert performance like insert type, design, plastic specifications, and installation process, and briefly details the different styles of inserts which are designed to accommodate various performance requirements and installation methods. Also explained in the paper is about the hole designing in different inserts, along with the figure illustrating the included taper angle in both straight hole and tapered hole. The paper concludes that in order to prevent jack-out affect in the assembly the hole in the mating component must be larger than the outside diameter of the assembly screw but smaller than the face diameter of the insert.
1.The Following Factors Affect Insert Performance1
2.How They are Installed2
3.Hole Design Guidelines2
4.Mating Components2
5.1.Performance Terminology of Inserts1
5.2.Maximum Taper Percentage of Straight Hole and Tapered Hole2
5.3.Pull-Through Configuration of Inserts3
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