| 2012 |
| Strongest bolted connection - BaerCoil® System's wire thread inserts combined with forming taps |
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The new BaerCoil System is strong, wear-resistant and offers enormous saving potential for material, weight and costs. The construction provides new possibilities for commercial usage and for the strain capacity of screw joints. Engineers from nearly all mechanical engineering fields are searching for building components that have a greater strain capacity and for ways of reducing both weight and costs. Bolted connections must also fulfill these requirements. Thus, they have continuously been the focus of innovation.
BaerCoil wire thread inserts, which are turned into a formed parent thread, achieve exceptional pull-out strength- and wear-resistance values. There are two reasons for this:
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| 1. The thread is formed and not cut. Specialized BaerCoil forming taps, which form and plasticize the material, are used for this purpose. The parent thread material is compressed to make it denser. Result: The thread into which the BaerCoil wire thread insert is turned has a significantly higher strain capacity. The process of thread forming is quicker and produces a better surface than thread cutting. Additionally there are no chips, and the thread forming tap has a longer life time. |
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2. The BaerCoil wire thread insert ensures an optimal distribution of pull-out load for the thread turns across the entire thread length. By comparison the first two threads of a normal screw joint often carry over 70% of the load. An even distribution across the thread insert greatly increases tensile strength. The longer the thread insert, the greater the strain capacity is compared to a normal thread. The drawing illustrates the possible material savings when using a smaller screw or smaller thread.
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| Fastener Fair in Hannover 24.04.2012 to 26.04.2012 |
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Publication in professional magazine: Fastener Fixing Technologies - Read Issue 5
