The eccentric shaft is another significant part of the jaw crusher's design. It is the component that imparts the crushing motion to the movable jaw plate through the pitman. As the eccentric shaft rotates, it creates an oscillating motion that allows the jaw plates to open and close. The shaft is usually made of high carbon steel for strength and durability, allowing it to withstand the heavy forces encountered during operation.

- Construction For foundations, pilings, and site preparation, DTH techniques enable precise hole placement and stability in challenging geological conditions.

Moreover, the environmental sector has also adopted the use of 20mm drill rods for soil testing and environmental assessment. These applications are vital for understanding contamination levels, groundwater flow, and other environmental factors that influence land use and development projects.

The DTH hammer operates through compressed air, which is pumped through a series of valves and chambers within the hammer. When the air pressure builds up, it drives a piston that strikes the drill bit, creating a powerful force that breaks the material. This process continues in rapid succession, allowing the drill bit to penetrate the ground efficiently. The design of the DTH hammer allows for a larger drop height of the piston than traditional rotary drills, resulting in higher impact energy and better drilling performance.

1. Greater Efficiency DTH drilling significantly reduces drilling time when compared to rotary methods. The direct impact of the hammer allows for faster penetration rates, enabling operators to cover more ground in shorter periods. This efficiency is especially critical in industries where time equates to money.

- Cost-effectiveness Although bullet teeth may have a higher initial cost, their durability and long service life reduce overall replacement and maintenance expenses.

The Versatility and Application of 20mm Drill Rods