Pneumatic Jack Hammer Paving Breaker (B87C B67C B47)

jack hammer is mainly used in mining secondary breaking, it is also widely used in municipal buildings excavated bedrock, demolition concrete structures and crushing frozen soil, remediation various concrete structures such as pavement and subgrade.
It's a type of compressed air-powered tools. When work, the compressed air distribute alternatively through distributing valve into either end of the cylinder.
That make the hammer inside doing reciprocating motion to impact the shank of steel rod. The steel rod chisel into the concrete foundation and then break the concrete into many pieces.