FLAT NECKLACE 19mm.

Function and technical context

The 19 mm flat collar is a fastening and positioning element that acts as a stop or guide on shafts, rods and rotating or sliding components within transmission, steering or driving systems of marine engines and auxiliary boat equipment. Its main function is to limit the axial displacement of a moving part, ensuring that it remains in the correct position during operation and absorbing the axial loads generated in service. A collar in poor condition or with excessive play causes abnormal vibrations, accelerated wear of adjacent components and can lead to failure of the mechanical assembly in which it is integrated.

When to replace this part?

The most common symptoms that indicate that a flat collar needs to be replaced are noticeable axial play in the shaft on which it is mounted, metallic noises or rattles during the movement of the mechanism, and visible marks of rubbing or deformation on the bearing surface of the collar. It is recommended to inspect this component at each seasonal inspection or each time the mechanical assembly to which it belongs is dismantled, since its preventive replacement prevents premature wear of higher-cost parts such as axles, bearings or guide bushings.