Load Hoist Sheaves and Boom Tip Sheave Diameter Requirements

What is the minimum required pitch diameter for load hoist sheaves and boom tip sheave?

Choose the correct option:

1. 10 times the normal diameter of the rope used
2. 15 times the normal diameter of the rope used
3. 18 times the normal diameter of the rope used
4. 20 times the normal diameter of the rope used

Answer:

The pitch diameter of load hoist sheaves and boom tip sheave should be at least 18 times the normal diameter of the rope.

In the context of mechanical engineering and lifting equipment, the pitch diameter of load hoist sheaves and boom tip sheave ought to be larger than the rope used for operation. According to several industry standards including the American Society of Mechanical Engineers (ASME), this ratio should be not less than 18 times the normal diameter of the rope. This rule helps to prevent damage to the rope and ensures smooth operation.

It is crucial to adhere to these specifications to maintain the safety and efficiency of lifting equipment. By ensuring the pitch diameter is sufficient, operators can minimize the risk of rope damage and maintain optimal performance during operations.