Nord Lock Washer Tightening Torque

Introducing torquelator by nord lock torquelator by nord lock calculates pre load and corresponding torque for bolted joints secured with nord lock washers.

Nord lock washer tightening torque. Torquelator by nord lock calculates the preload and corresponding torque for bolted joints secured with nord lock washers. Nord lock s general tightening guidelines are taking the increased friction into account and permit to achieve a very accura te tightening. Read more should i change my tightening torque with nord lock. The wedge effect prevents bolt loosening caused by vibration and dynamic loads.

The washers fit under the head of standard bolts. Torque values to install nord lock washers. A slightly higher tightening torque is therefore required to achieve the same clamp load as for a flat faced joint. When tightening according to guidelines and with no deviation this is the pre stress achieved expressed as of yield point.

Place one pair of nord lock washers underneath the head of the bolt and mount it in the through hole. Some users choose to keep their torque values when implementing nord lock washers. The web application can be used on any mobile device so you can easily make calculations on site without having to carry a brochure around with you. Closed cams correct open cams not correct tightening of through holes how it works nord lock x series washers combine nord lock wedge locking technology with a spring effect.

Note that since the locking function is not based on increased friction the untightening torque is generally lower than the tightening torque. The outer diameter of regular nord lock washers is designed for counterbore holes according to din 974 i e. Which torque to tighten with check the nord lock torque guidelines. With nord lock washers the difference between the tightening and untightening torque is even more significant.

Untightening nord lock washers is as simple as tightening. Tighten the bolt at a torque according to the nord lock torque guidelines using a calibrated torque wrench. Torquelator calculates preload and the corresponding torque for bolted joints secured with nord lock original washers and nord lock x series washers. Therefore it is not possible to measure offtorque as verification of locking function.

During tightening sliding occurs between the bolt head or nut and the serrated surface of the upper nord lock washer see fig 2a. Place the second pair of washers on the bolt and mount the nut. Available for different bolt grades and dimensions.