Any product requires regular maintenance. Only with diligent upkeep can one ensure optimal performance when needed, and this holds true for tungsten carbide down-the-hole (DTH) hammer bits as well. However, the maintenance of DTH hammers after use is significantly simpler; it primarily involves checking whether the internal piston operates smoothly and ensuring proper lubrication. For DTH hammers that have been in service for an extended period, the following maintenance steps should be adhered to:

1. Replace all internal "O" rings, check valve seals, and springs within the DTH hammer to ensure reduced air consumption.

2. Ensure proper lubrication of the internal moving components (piston) and remove any sharp edges and burrs formed during use (it is recommended to use an oil stone to smooth out the piston’s sharp edges and burrs).

3. Confirm that the check valve is unobstructed and returns to its correct position.

4. Replace the outer casing and cylinder as needed based on wear.

5. Install the components according to the installation sequence outlined in the tungsten carbide DTH hammer bit manual or installation diagram.

6. Store the equipment properly to prolong its lifespan.