COLLARIN EJE 1-1/8`` (AL)

Function and technical context

The shaft collar is an axial positioning and fastening component that is installed over the drive shaft of a boat, working within the propulsion system to prevent longitudinal displacement of the shaft and maintain proper alignment between the engine and propeller. Made of aluminum, this 1-1/8'' collar offers a strength-to-weight ratio suitable for nautical applications where corrosion and lightness are determining factors. Its function is critical: a collar in poor condition or poorly adjusted can cause vibrations in the shaft, premature wear of the horn or horn, and even misalignment of the drive assembly, with the consequent increase in fuel consumption and risk of damage to the transmission. The reference REC9139AL uniquely identifies this part, guaranteeing dimensional compatibility with the applications for which it has been designed.

When to replace this part?

The most common symptoms of a damaged or loose shaft collar include abnormal vibrations felt in the hull or helm station, metallic noises coming from the shaft line during navigation, and irregular or accelerated wear of the shaft or horn bearings. It is recommended to inspect the collar during each seasonal maintenance, checking the tightness of the fixing screws, the absence of galvanic corrosion and the surface condition of the aluminum. Replacing this component preventively when looseness or pitting is detected is the best way to avoid a breakdown in the shaft line during navigation, a repair that is significantly more expensive than replacing the collar itself.