COLLAR PLANO Ø55mm. (AL)

Function and technical context

The flat aluminum collar with a diameter of 55 mm is an axial clamping and positioning element that acts as a stop or spacer on axles, transmission shafts and rotating assemblies in nautical installations. Its main function is to maintain the correct position of the components mounted on an axle, avoiding unwanted longitudinal movements that could compromise the alignment of the propulsion system or auxiliary groups. Being made of aluminum, it offers a favorable strength-to-weight ratio and good corrosion resistance in marine environments. A collar in poor condition or poorly sized can cause abnormal vibrations, accelerated wear of seals and adjacent bearings, and even loss of tightness of the system where it is installed.

When to replace this part?

The most common symptoms that indicate the need to replace a flat collar are: noticeable axial play in the shaft, unusual vibration during navigation, visible rubbing marks or deformation on the mating surface, and wear or pitting in the aluminum caused by galvanic corrosion. It is recommended to inspect this component at each seasonal maintenance or each time the transmission assembly is disassembled to check bearings and seals. Replacing the collar preventively when detecting any sign of looseness or corrosion prevents more costly damage to the shaft or adjacent sealing elements.

Compatibility