FLAT NECKLACE 80mm.

Function and technical context

The 80 mm flat collar is a fastening and positioning element that acts as a stop or mechanical guide in rotating or transmission assemblies in outboard and stationary marine engines. Its main function is to maintain the axial alignment of the components it works with, avoiding unwanted longitudinal displacements that could compromise the integrity of the assembly. As part of assemblies where dimensional precision is decisive, a collar in poor condition can cause abnormal vibrations, accelerated wear of adjacent parts or even blocking of moving parts, with the consequent risk of major damage to the engine or transmission system.

When to replace this part?

The most common symptoms that indicate that a flat collar needs to be replaced are: excessive axial play in the shaft or component it holds, metallic noises during operation, unusual vibrations or visible marks of wear, corrosion or deformation on the mating surface. It is recommended to inspect this component at each seasonal inspection or each time work is done on the transmission or coupling assembly to which it belongs. Replacing it preventively if there is any sign of deterioration prevents chain failures that are much more expensive to repair, especially if they occur during navigation.