PRODUCTS The ‘win-win’ coiled pin
In any assembled component there are three ways to reduce the overall cost of the assembly, argues Christie Jones, marketing manager, SPIROL International Corporation. They are: reduce the cost of the individual components, reduce component preparation cost, and reduce the cost to assemble the components.
T
o achieve optimal low cost designs, design engineers must examine not only product design but also the entire assembly process. Fastening products which improve the robustness of the overall product design and simplify the assembly process provide a ‘win-win’ for a company, but unfortunately the fastener is often an after-thought during the design process. The designer has then lost the opportunity to achieve an optimum product and manufacturing process unless there is a redesign. An example of a fastening product which fits the ‘win-win’ category is the coiled pin. This is a self retaining fastener designed to
absorb forces during use of the end-product, which thereby improves the life of the assembly and reduces warranty costs. In addition, it simplifies the design of an assembly as it replaces multiple components with one pin and decreases the cost of preparation for installation. Perhaps best of all, it is easy to automate so assembly and the associated labour time and cost are minimised. By design, the coiled pin has an interference ‘fit’ that conforms to the shape and size of the mating component’s hole. Coiling, or
flexing, of the pin results in controlled insertion forces that prevents damage to the mating component during installation. In addition, the flexibility of the pin also protects the component from damage during the product’s life as it absorbs working forces. Finally, the flexibility of the pin provides a retention force that will keep the pin in the hole for the life of the assembly. Coiled pins operate in holes with relatively wide tolerances. In most assemblies, coiled pins can be utilised in holes that have simply been drilled rather than prepared with an expensive
reaming operation. This reduces the cost of hole preparation - another important factor in reducing the overall cost of the assembly. The combination of square, burr-free ends, controlled insertion forces, and its symmetrical design, all of which ease feeding of the pins, makes the coiled pin the ideal component for semi or fully automated assembly systems.
www.spirol.com Simple, fast, easy B2B online
Harrison & Clough Ltd has launched its new B2B website, which gives fast access to Harrison & Clough’s unique collection of market leading brands across fasteners, fixings, hand tools, power tools and power tool accessories.
T
he new look website is quick and modern and is full of new features, new imagery and refreshed ranges to make the site more user-friendly and encourage customer interaction.
The site has been developed to give merchants swift and
straight forward access to all of Harrison & Clough’s portfolio. The updated layout is clear and product selection is fast; either by use of an improved search facility or, for those who prefer to click than type, by the easy to navigate product images. The website’s new features include a basket system of ordering with capability to store the baskets as quotes to review
later, a favourite option for products, links to merchants own code references and exclusive online deals. The main benefit to the merchant as an H&C customer is after login, when ‘nett terms’ will be shown and ‘live’ stock answers are available at their fingertips. Merchants can order up to 7pm for next day delivery on H&C’s
own fleet of vans and review their account and orders placed directly through to the H&C IT system and distribution process. “Our new website can be viewed today. For full functionality
and to start ordering please request your login and password details through the site or directly with the H&C sales desk.”
www.harclo.com
Optimum thread forming in plastic
EFC International, a provider of specialty engineered fastener component parts, now has stock on the latest PT®
screw development, the Delta PT® E
provides optimum thread forming in plastic without any material damage. FC International explains that the Delta PT®
, which it says screw provides better clamp loads and increased joint life in a wide
range of plastic materials. It also offers improved vibrational safety, improved dynamic safety from new shear area, and high clamp load at smaller contact pressure from increased flank engagement. Stock sizes include 4mm to 6mm diameters and 12mm to 25mm lengths with round washer head.
EFC also provides Delta PT® screws in 1.8mm to 10mm diameters and 3mm to 100mm lengths with any head style. EFC
offers professional engineering support and samples. EFC is a US master distributor with facilities in Atlanta, St Louis, Chicago, Detroit and Toronto.
www.efc-intl.com 156 Fastener + Fixing Magazine • Issue 75 May 2012
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