　The JL452H crawler-type hydraulic down-the-hole drill boasts a comprehensively optimized structure, lower drilling cost per meter, and a more user-friendly design. It is powered by a diesel engine (or electric motor) coupled with a hydraulic oil pump unit, and utilizes hydraulic motors to perform auxiliary operations such as drill rotation, propulsion, lifting, travel, and hydraulic cylinder swing-angle positioning.
Primarily used for drilling and blasting operations in hydropower projects, open-pit mining, road construction, and defense engineering.

Technical Parameters

Project Item		Unit	Parameter
Drilling parameters Hole range & depth	Drill hole diameter Drilling diameter	mm	90-130
	Drilling depth Max. hole depth	m	24
	Drill pipe specifications Drilling pipes	mm	Phi 68 × 3000
	Number of drill pipes Number of pipes	/	6+1
	Rod replacement method of changing pipe	/	Automatic Automatic
	Impactor specifications DTH hammer	inch	3.5"
Engine Engine	Engine model Model	/	YCA0724-T300
	Engine rated power/rpm Rated power/ rotation speed	kW/rpm	176/2200
	Fuel tank capacity Fuel tank capacity	L	250
Air compressor Compressor	Aircraft nose manufacturer Air compressor manufacturer	/	Baus BSC
	Rated airflow Air flow at normal working pressure	m³/min	15
	Maximum wind pressure Max. air pressure	bar	19
Hydraulic system Hydraulic system	Maximum working pressure of the main pump Maximum pressure of main hydraulic pump	MPa	25
	Main pump flow rate Main pump flow	ml/r	32
	Auxiliary pump flow rate Auxiliary pump flow	ml/r	32+32
Rotating device Rotary head	Maximum torque Max. torque	N.m	1600
Rotating device Rotary head	Maximum rotational speed Rotation speed	RPM	0-135
Propeller Feed	Propulsion type Feed mode	/	Oil cylinder + chain hydraulic cylinder + chain
	Advance the journey Travel stroke	mm	3700