Preload Torque - Microntech Engineers

Pre-Load Torque

In today’s blog the topic of discussion is about the preload torque and its significance in torque tightening.

Bolt and nut combinations are used to join the joint together by generating a compressive force between them. The threads of the nut and the threads of the bolt/screw interlinked together to apply force at either side of the joint material. This tension generated is called bolt preload, which is generated due to the nut tightens against the bolt.

When the weight of application or joint is placed on the bolt, there is a limited amount of a load the bolt can sustain before failing. However, when the material is tightened with a bolt, then the bolt distributes the force through the material, so the bolt can itself hold the load. If the correct amount of the tension is applied on the bolt then the bolt can hold a higher load. This tension is called Pre-load.

Pre-load is the important part of tightening to join together application because without applying pre-load on the bolt the whole application load will be on the bolt and it can fail anytime leading to poor quality tightening. When the pre-load is applied on the bolt then the number of bolts required to clamp the application together will be less.

            When the preload was applied to the bolts it distributes the load across the application near the head of the bolt. If the preload is applied then the bolt installed on the application can withstand a much greater load because it distributes the force across the application. When the bolt. When the preload is not applied on the bolt and the general tightening load is applied then the whole load is on the bolt due to which the bolt can fail anytime during the application practical use.

In case you want to learn more about Torque concepts you can contact Microntech for a training seminar which happens every month. If interested you can contact the nearest Microntech branch by emailing at sales@microntechgroup.com and also see our global assembly solution offering at www.microntechgroup.com.