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On the other hand, PDC bits, a more recent innovation, have revolutionized hard rock drilling. Composed of synthetic diamonds bonded to a tungsten carbide substrate, PDC bits offer exceptional penetration rates and extended service life. Their ability to maintain consistent performance under high temperatures and pressures makes them ideal for drilling deep into the earth's crust Their ability to maintain consistent performance under high temperatures and pressures makes them ideal for drilling deep into the earth's crust Their ability to maintain consistent performance under high temperatures and pressures makes them ideal for drilling deep into the earth's crust Their ability to maintain consistent performance under high temperatures and pressures makes them ideal for drilling deep into the earth's crusthard rock drilling bits.

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Once the material has been chosen, the focus shifts to the design. The dimensions of the sleeve must be precise to fit the shafts it will connect. Tolerances are measured in fractions of a millimeter, demonstrating the level of accuracy required. The design also needs to consider how the sleeve will be secured to the shafts. This could involve keys, setscrews, or other retention methods to prevent slippage or disconnection under load.

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