Guide: Guarantee Proper Screw Tightening with the Right Sequence

Many joints incorporate multiple fasteners, presenting a challenge in achieving proper torque, especially when joining non-flat surfaces. The sequence of tightening these fasteners significantly impacts the resulting preload and clamping force, crucial for holding parts together. This phenomenon, known as Cross Talk, occurs when tightening one fastener affects the preload generated by another nearby fastener.

To ensure an even distribution of preload in the joint, a well-defined tightening sequence is essential. Joints with conventional gaskets, having relatively low compressive stiffness, are particularly sensitive to tightening sequences. Typically, for bolts arranged in a circular pattern, a criss-cross (star) tightening pattern is recommended. Conversely, non-circular bolt patterns often benefit from a spiral pattern starting from the centre.

In critical or relaxation-prone joints, a multiple tightening sequence may be specified to ensure uniform preload distribution. Proper sequence-based fastening is vital for process control and quality results across various applications. When encountering cross talk, where torque applied to one fastener affects others in the pattern, adjusting the sequence becomes necessary for optimal outcomes.

Position Control torque arms, such as the EZ-Glider by Mountz Inc., mitigate the risk of incorrect fastening. These torque arms guide operators through the correct tightening sequence and provide feedback if deviations occur. By integrating EZ-Glider torque arms into the assembly process, manufacturers can detect and rectify costly screw-fastening errors, enhancing both productivity and product quality.

Programming assembly sequences into EZ-Glider torque arms is straightforward using the user-friendly control box. Up to nine sequence programs can be stored and easily accessed, either manually or automatically, streamlining operations and ensuring consistency.

Ergonomic Considerations: A Strategic Investment

In planning production areas, prioritizing ergonomics yields long-term benefits for manufacturers. Consulting health and safety professionals ensures that both the workplace and assembly operations are conducive to the majority of operators, minimizing risks of work-related health issues and associated costs.

Manufacturers should assess their production areas with key questions in mind:

• How frequently do assemblers report fatigue or arm pains?
• What is the cost of a typical injury to the organization?
• How many workers' compensation claims have been filed?
• How often are applications reviewed by health and safety inspectors?
• What ergonomic solutions are being considered for each application?

EZ-Glider Position Control torque arms are engineered to enhance production efficiency and quality control while prioritizing operator well-being. Their ergonomic design reduces the risk of repetitive motion injuries and carpal tunnel syndrome, facilitating comfortable tool operation and increased productivity. Additionally, Mountz torque arms eliminate torque reaction from power and pneumatic tools, further enhancing worker safety and efficiency.

The Mountz Advantage 

At Mountz, we understand the importance of human customer support. That's why our experienced team takes the time to understand your application requirements comprehensively. Drawing on our extensive industry experience, we offer personalized recommendations to streamline your assembly processes and enhance efficiency.

Mountz stands out in terms of durability. We know that preventing downtime is paramount to your success, so our tools are built to last. Rigorously tested to meet the highest standards, our products deliver unmatched reliability, ensuring your operations run smoothly without interruption.

Trust Mountz for industry-leading torque solutions designed by experts, backed by exceptional customer support, and built to withstand the demands of your assembly processes. Contact us today and experience the Mountz advantage first-hand.