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Distributor's Link Magazine Summer 2022 / Vol 45 No 4

62 THE DISTRIBUTOR’S

62 THE DISTRIBUTOR’S LINK Anthony Di Maio Anthony E. Di Maio attended Wentworth Institute and Northeastern University. In 1962 he started working with Blind Fasteners as Vice-President of Engineering & Manufacturing for two blind rivet manufacturers. He has been Chairman of the Technical Committee of the Industrial Fasteners Institute (IFI) and is still involved in the writing of IFI specifications. In 1991, he started ADM Engineering and is working with Fastener Manufacturers developing new fasteners and special machinery. He can be reached at ADM Engineering, 6 Hermon Ave., Haverhill, MA 01832; phone and fax 978-521-0277; e-mail: tdimaio@verizon.net. SELECTING THE CORRECT BLIND RIVET FOR YOUR APPLICATION The following topics should be evaluated to determine the correct blind rivet to use in your application. Environment Is the application indoors or outdoor, near a corrosive environment, used in a food application. Let us discuss these four environments. ¤ Indoor - Any alloy or any alloy combination of alloys blind rivets can be used. ¤ Outdoor - Cannot use a blind rivet that has a steel mandrel. Even if the mandrel is plated, it will rust where the mandrel breaks when setting the blind rivet. Aluminum and stainless steel would be the alloy blind rivet to use. ¤ Corrosive Environment - Stainless steel would be a good choose depending on how severe the environment is, aluminum may also be used. ¤ Food Applications - Stainless steel must be used. Material To Be Fastened The blind rivet should be made of the same material of the riveting application. Example, if the material of the rivet application is aluminum, the blind rivet body should also be aluminum. There is no chemical reaction if the application and the rivet body are made of the same material. You can use a blind rivet with an aluminum CONTRIBUTOR ARTICLE rivet body with an aluminum, steel or stainless steel mandrel. If the application is made of steel or stainless steel, the blind rivet body should be made of the same material. Tensile And Shear The blind rivet must be of the proper tensile and shear strength to secure the assembly of the blind rivet application. So far, we now know environment the blind rivet will be subjected to and the alloy of the blind rivet. Based on the tensile and shear loads your riveted assemble will be subjected to will determined what tensile and shear value the blind rivet should be. Knowing the tensile and shear loads on the riveted components will determined the diameter and tensile and shear value the blind rivet or rivets should be. All blind rivet manufacturers list the tensile and shear values of all the blind rivets in their catalog. Work Thickness The work thickness will determined the length of the blind rivet needed for your application. All blind rivet manufacturers list the grip range of their blind rivets. Select the blind rivet that has a grip range that is equal to the work thickness of your application. When you use the method that I just described to determined the length of the blind rivet, you will avoid two bad situations. CONTINUED ON PAGE 160

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