What is the diameter of the tool that a Hydraulic Impact Breaker can use?

The diameter of the tool that a Hydraulic Impact Breaker can use is indeed 5.5 inches (13.97 cm). This size is typically selected for hydraulic impact breakers because it strikes a balance between efficiency in breaking material and the mechanical capabilities of the breaker itself. The 5.5-inch diameter facilitates effective penetration into concrete and rock, enabling the breaker to deliver optimal impact energy without overstressing the hydraulic system or the attachment.

Using a tool that is appropriately sized ensures that the hydraulic impact breaker can operate effectively within its designed parameters, providing the necessary force to break materials while maintaining the integrity of the equipment. The range of diameters listed in the question reflects various applications for impact breakers; however, the 5.5-inch size is often regarded as a standard for various medium to large scale jobs.