73. Weakness in the performance of the round half-key locking for marine eye bolts

73. The crescent locknut is a type of key with a flat top surface and a semi-circular arc bottom surface, parallel side surfaces, commonly known as a crescent key. Its connection method is similar to that of a flat key, but it is easier to manufacture and assemble. It is particularly suitable for connecting tapered shafts with hubs. However, its drawback is that it weakens the shaft's strength, so it is generally used only in areas with less force.

73. Calculation of connection strength for the semi-circular key locking of the through-bolt

If you know the shaft diameter d, checking the mechanical handbook will provide all dimensions of the 73. semi-circular locking key for the hole, including the nominal length.