COLLAR FOR 85mm SHAFT.

Function and technical context

The 85mm Shaft Collar is a clamping and positioning component that works directly on the boat's drive shaft, ensuring it remains correctly aligned and fixed in its axial position within the propulsion system. Its main function is to prevent longitudinal displacement of the axis, acting as a mechanical stop that supports the axial loads generated during navigation, both in forward and reverse gear. A collar in poor condition or with excessive clearance compromises the integrity of the entire drive train, and can cause abnormal vibrations, premature wear of the bollard and thrust bearing, and even loss of control of the propeller. Reference TEN00523 is manufactured for a shaft diameter of 85 mm, so exact dimensional compatibility is essential for a safe and functional installation.

When to replace this part?

The most common symptoms that indicate that the shaft collar requires replacement are: noticeable axial play in the shaft when pushed manually, unusual vibrations transmitted to the hull during navigation, and metallic or knocking noises in the horn or stuffing box area. It is recommended to visually inspect the collar during each seasonal maintenance, checking the tightness of the fixing screws and the condition of the contact surface with the shaft; Any sign of corrosion, cracks or deformation is reason for immediate replacement. Replacing this component preventively at the slightest sign of wear prevents major breakdowns in the drive train that could leave the boat inoperable during navigation.

Compatibility