COLLAR SHAFT 55mm.

Function and technical context

The 55mm shaft collar is a fastening and positioning element that acts directly on the boat's drive shaft, keeping it aligned and restricting unwanted axial displacement. It works in the transmission system, located between the engine and the propeller, working closely with the shaft bearings, the stuffing box and the intermediate supports to guarantee that the rotation is transmitted smoothly and without vibrations. Its correct function is decisive for the integrity of the propulsion system: a collar in poor condition allows the shaft to migrate axially, which causes accelerated wear of the bearings, abnormal vibrations in the hull and premature deterioration of the stuffing box or mechanical seal. The reference TEN00515 corresponds to a shaft diameter of 55 mm, essential information to ensure correct adjustment during assembly.

When to replace this part?

The most common symptoms that indicate that the shaft collar needs to be checked or replaced are: unusual vibrations noticeable in the hull or helm station at certain rpm, metallic noise coming from the shaft line, excessive axial movement of the shaft detectable when pushing it manually with the engine off, or visible rubbing and corrosion marks on the surface of the collar. It is recommended to inspect this component at each seasonal inspection, paying special attention to the tightening of the fixing screws and the condition of the contact surface with the shaft. Replacing the collar preventively at the slightest sign of wear prevents damage to the shaft line that can leave the boat inoperative during navigation and lead to higher cost repairs.