When you tighten the screw, torque is transformed into axial tension.
This tension pulls the housing and band, creating uniform radial force to seal and fix the hose.
The performance of the screw directly determines whether the torque is accurate, stable, and safe.
Low-strength screws: Cannot bear high torque; easy to deform, slip, or break under rated torque.
High-strength screws (8.8, 10.9, 12.9): Support stable torque output, ensure consistent clamping force.
If strength is insufficient: torque value is invalid, and the clamp may loosen suddenly.
Larger diameter: Higher axial force under the same torque.
Finer thread: Higher torque transmission efficiency, better self-locking.
Thread damage or wear: Torque cannot be loaded correctly, leading to inaccurate clamping.
Galvanized, Dacromet, or lubricated screws: Lower friction → higher actual preload at the same torque.
Rusty or dry screws: Higher friction → torque reading is high but clamping force is insufficient.
Friction inconsistency causes torque deviation.
Poorly matched screw and housing: Jamming during tightening → false torque.
Unstable thread fit: Clamp loosens under vibration even if torque is correct.
Under-torque effect: Screw cannot hold force → hose leakage, slipping, vibration loosening.
Over-torque effect: Screw exceeds load → screw breakage, clamp deformation, hose crushing.
Inconsistent torque: Unstable assembly quality, high failure rate in batches.
Use matched diameter and high-quality thread
Select appropriate strength grade
Ensure stable surface treatment and friction condition
Tighten with standard torque tools
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