FLAT NECKLACE 50mm.

Function and technical context

The 50mm flat collar is a fastening and positioning element that acts as a retaining ring or spacer on shafts, drive shafts and rotating assemblies of outboard and stationary marine engines. Its main function is to axially fix components on an axle, preventing unwanted longitudinal movements that would compromise the alignment of the drive train or drive system. In marine environments, where constant vibration and exposure to corrosion are aggressive factors, a collar in poor condition can cause progressive looseness, accelerated wear of adjacent components and, in extreme cases, mechanical failure of the assembly it holds.

When to replace this part?

The most common symptoms of a deteriorated flat collar include noticeable abnormal vibrations in the shaft or surrounding housing, rattling metallic noises during operation, and visible axial play when manually moving the retaining component. It is recommended to inspect the collar during each seasonal maintenance, checking its dimensional integrity, the absence of cracks and that it maintains the appropriate tightening tension. Replacing it preventively when detecting the first signs of wear avoids more costly breakdowns that can leave you stranded on the high seas.

Compatibility