Spiralock® wire thread inserts feature a unique thread form that maintains bolt tension under severe vibration conditions. They are used in applications where maximum integrity is essential. Examples included helicopter gearboxes and rotor hubs, high pressure lightweight compressors, oil industry drill bits and underground train gearbox casings.

How does it work?

Standard Spiralock

Spiralock® radially centres the male member to the female member and compressively loads each engaged thread on the wedge ramp, resulting in an even distribution of the bearing load on the entire wedge spiral. Fatigue failures due to high stress concentration on the first engaged thread experienced by standard thread forms are virtually eliminated.

Let us prove it

The Cross Manufacturing Company has invested in a transverse vibration test rig with computerised instrumentation to test the resistance to vibration-induced loosening of Spiralock® thread inserts.

In addition to providing customers with technical guidance on torque tightening for all applications where vibration may be an issue, the rig is of particular benefit to customers with especially arduous or critical applications.

For further information please visit www.Spiralock.com.