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Creating a permanent and secure connection – this goal is common to all bolted connections. To achieve it, a specific mounting preload force must be obtained when tightening the screw. In this article you can find out why the loss of preload force should be taken into account and what the type and condition of the screw have to do with it! What...

Everyone who works professionally with fastener-tightening tools has probably heard of the cam-out effect. And every amateur DIYer has experienced it, even if they are unaware of that name. After all, the cam-out effect is the main cause of accidental tool slippage when working with Phillips screws. What causes the cam-out effect? And why does it...

The use of a torque wrench is advisable wherever a joint requires tightening to a specified torque. If the torque wrench is correctly set, it trips when that torque is reached and displays the correct torque value. This is an important basic prerequisite to achieve the correct target torque. But that alone is sometimes not enough: another crucial...

Basically, there are seven widely used types of wrenches: open-ended and double-ended spanners, sockets and nut spinners, ratchet ring spanners, monkey wrench - english model, monkey wrench - french model, pliers wrenches, box spanners

Every well-stocked toolbox contains at least one ratchet. There is a good reason for this: unlike a screwdriver, a ratchet can be used to tighten fasteners with ease, even in confined spaces.   Definition: what is a ratchet? In toolmaking, a ratchet or reversible ratchet is a tightening tool that applies torque in one direction only, so there...

To make a secure bolted connection, it is not only the size of the tool (profile size) that matters – it's just as important to know the most common fastener profiles, their advantages and disadvantages. The following article presents the most important types of fastener heads: Slotted-head screw Cross-slotted screw head (Phillips recess,...