What rock drill is made of
Pneumatic drilling of rock (Sommeiller).
- Piston — has part. A percussion piston.
- Drill steel rod with bit — has part. A steel rod with a bit.
- Rotation mechanism — has part. It rotates the rod between blows.
- Compressed air — uses. Pneumatics.
- Cast iron — is made of. The casing is cast iron.
- Steel — is made of. Drill bits are steel.