tools for drilling through rock in tunnels, specifically designed ...

When using a center drill bit, it's essential to remember that they are not intended for deep drilling tasks. Their primary function is to create a shallow indentation, typically about one-third to one-half the diameter of the intended final hole. For this reason, they should be used with a lower speed and sufficient pressure to ensure a clean, accurate start without overheating the bit or the material.

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In conclusion, the rotary jack hammer is a symbol of brute force and precision in the world of construction and demolition. Its design, functionality, and versatility make it a go-to tool for professionals dealing with tough materials. Whether it's breaking down walls or drilling deep into solid rock, the rotary jack hammer continues to prove its worth as an essential piece of equipment in various construction applications.

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