Applying The Right Torque
Metric Fasteners and Torque
Applying the right torque to a fastener is something of a balancing act. Add too little torque and your fastener becomes a “non-fastener “– it simply slides back out of the hole. Add too much torque, however, and the force may be more than the screw can bear, causing stripped threads or even outright breakage. The materials that make up the fastener will have some say in how much torque you can safely apply. Nylon and softer metals will enjoy less torque tolerance than, say, stainless steel. Automated assembly lines for specific applications have to be told how much torque to apply. Once the ideal amount of torque is known for a particular assembly or sub-assembly, the machines that drive the fasteners into place can then deliver that precise amount every time.
Sooner or later, however, these machines can start to lose their accuracy. Our parent company, Mountz, makes a variety of torque testers and calibration tools that allow you to check the torque levels at regular intervals and adjust them back to ideal tolerances. If you are assembling a product by hand, that degree of machine accuracy isn’t possible to duplicate simply by feel — you need a torque screwdriver. Torque screwdrivers may come with a narrow preset torque range, or they may be adjustable by the user to meet different needs. Again, Mountz makes both preset and adjustable torque screwdrivers that will keep you from stripping or slacking off on those screws.
So if you have a screw loose — literally — or you’re feeling a little torqued yourself from all the stripped and broken fasteners your company keeps going through, take steps to correct the situation by selecting the right fasteners and equipment for the job. Contact us — we’re happy to help!