Is Adhesive the Best Bolt Locking Method?

Adhesives or Nord-Lock washers? Finding the ultimate bolt securing system is no easy task. Here is a guide to making the right choice.

  Nord-Lock Wedge-Locking Adhesives
Locking capability Reliable Varies
Range M3-M130 Unlimited (not size dependent)
Temperature Same temperature characteristics as regular bolts/nuts. Sensitive to high temperatures.
Assembly No preparation required. Requires degreasing.
Curing time No curing time. Up to 12 hours (increased downtime of equipment).
Control over clamp load Linear relationship between torque/load thus possible to predict the clamp load. Does not increase the risk of torsion. Adds friction in the thread, making it difficult to predict the clamp load. Also increases the risk of torsion.
Disassembly No special requirements. Requires heating.
Reusability Reusable. Does not affect reusability of bolts/nuts. Not possible to reuse. Bolts/nuts needs to be cleaned before reuse, which is time consuming.
Environment Recyclable. Meets ELV and RoHS directives. Not recyclable, contains contaminous chemicals. May
cause allergic reactions.
Lubrication Possible to lubricate. Not possible.
Visual inspection Visual inspection possible. Visual inspection possible.
Life cycle cost (LCC) Low. Relative high price per unit. Long life cycle. Improves stability and minimizes maintenance cost. High. Relative low price per unit. Short life cycle. Increases maintenance costs and assembly time.

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