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SPRING 2013

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Distributor's Link Magazine Spring Issue 2013 / VOL 36 / NO.2

70 THE DISTRIBUTOR’S

70 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. THE FEATURES OF BLIND RIVETS Many people have asked me, "why do blind rivet manufacturers add radial rings, grooves or serrations to the mandrel diameter of blind rivets" These radial grooves are added to the mandrel circumference to ensure that the griping jaws of the blind rivet setting tool do not slip when setting the blind rivet. These radial grooves are put on the mandrels of high tensile blind rivets, such as stainless steel and structural blind rivets. pulling jaws when the teeth of the pulling jaws are in the radial grooves. The pitch between the radial grooves match the pitch between the teeth of the pulling jaws, thus giving the pulling jaws a good grip on the mandrel of the blind rivet. Even if the pulling jaws are worn, the teeth of the pulling jaws will still grip the radial grooves of the mandrel. The pulling or griping jaws of the setting tool first grip the mandrel diameter and then, as the setting tool starts to pull the mandrel, the pulling jaws penetrate the mandrel for a locking grip. The pulling jaws have an approximate 10-degree angle on their outer surface and they are in a 10-degree tapered hole. The more the pulling jaws pull the mandrel the deeper the jaws penetrate the mandrel. The pulling jaws must first grip the mandrel with the teeth that are on the pulling jaws. The first initial griping is done by the sharpness of the teeth of the pulling jaws and allows the pulling jaws to penetrate the mandrel when setting the blind rivet. If this initial griping does not occur, the pulling jaws will slip when setting the blind rivet. The radial grooves on the mandrel ensure that the pulling jaws will grip the mandrel by the teeth of the The higher the mandrel tensile strength, the harder the surface of the mandrel. Radial grooves on high tensile strength mandrels lengthens the setting life of the pulling jaws. High tensile mandrels are used with stainless steel, steel and aluminum structural blind rivets. Annealing (heat treat) blind rivet bodies is important when manufacturing blind rivet bodies. When bodies are produced, either stamped from sheet stock or extruded from wire, a large amount of work hardness is in the formed rivet body. please turn to page 205

THE DISTRIBUTOR’S LINK 71 Quantum Storage Systems 15800 NW 15th Avenue, Miami, FL 33169 Tel: 1-800-685-4665 or 305-687-0405 Email: sales@quantumstorage.com www.quantumstorage.com QUANTUM STORAGE SYSTEMS OFFERS UNIQUE STORAGE SOLUTION FOR FASTENER DISTRIBUTORS Quantum Storage Systems’ Shelf Bin Systems is the economical small parts storage solution to keep parts easily accessible. Easy to order, the system comes as a COMPLETE PACKAGE WITH BINS! Choose from a selection of bins and shelving sizes and bin colors of blue, yellow, red, green, ivory or black. Color code products are the perfect solution to simplify order picking and inventory control. Open hopper front bins with label area provide fast access to stored items. The bins feature a unique rear “V” lock which enables bins to be hung from the shelf above when in use. This all-in-one unit is easy to clean and will not rust or corrode. Heavy duty, high grade shelving offers a 400lb capacity per shelf. 36” wide shelving has a smooth powder coat finish. Quantum is also a nationwide provider of other shelving finishes including epoxy-coated, chrome, solid stainless and solid galvanized. Great storage products, delivered quickly at the guaranteed lowest prices - Quantum! ASK US ABOUT OUR NATIONAL VMI PROGRAM! Like Quantum Storage Systems on Facebook

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