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In bolted joints, the use of washers has become something of a default practice. At first glance, a washer seems like a simple component, just a flat disc placed between the nut or bolt head and the joint surface, but underneath this simplicity lies a complex interplay of mechanics and materials that can make or break the performance of your assembly over time.

Let's then take a look at why washers are used, how they impact bolt relaxation, and why the phenomenon of embedding, frequently underestimated, deserves special attention in joint design. 

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In industrial fastening, speed is often mistaken as a straightforward way to increase productivity. This assumption, often simplified further as in "doubling the speed will double the output", is misleading, as it disregards the complexities of torque control, joint characteristics, and material properties. While faster speeds can reduce cycle times, they also introduce risks such as thread stripping, cross-threading, and inconsistent torque application. Therefore, proper speed management is essential to strike the right balance between efficiency and precision, ensuring high-quality assemblies while avoiding costly rework and defects.

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It's not unusual for someone new to precision fastening to complain about the lack of precision of electric screwdrivers when dealing with hard joints; in reality, a smart fastening system with torque control like Kolver's K-DUCER can be easily programmed to achieve superior precision even with the hardest joints.
As we have seen before, a hard joint is characterized by minimal movement between the mating surfaces during tightening, resulting in a rapid increase in torque once the fastener makes contact. This abrupt torque rise can lead to over-tightening, potential damage to components, or inconsistent clamping forces when working at too high of a speed, due to the inertia of all the rotating parts.

The K-DUCER addresses this challenge through its downshift function.

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Kolver is proud to present our brand new angle heads for our electric screwdrivers with torque & angle control in the 3 to 70 Nm range.
Completely designed and manufactured at our Thiene, Italy headquarters, these angle heads are compatible with both the current-controlled PLUTO series and the tranducerized K-DUCER line.

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Kolver is excited to announce the launch of our new bit change system (code 020043), designed to provide a low-cost solution for robotic and automated fastening applications that utilize different bits.

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