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widely used for express railway,high bridge,subway,, civil construction,high efficient hydraulic system. - details see: https://www.machineto.com/dbr250-rotary-drilling-rig-10113690

DBR series Rotary Drilling Rig is a deep foundation piles of large diameter hole equipment, combines modern hydraulic pile Machinery of new technologies, new processes, the main performance has reached to an advanced level of similar products, international selection of key parts and procurement ensuring the reliability of the machine, the drill rig can be equipped with a short auger, rotary hopper, core drilling, hydraulic hammer and other drills can be boring clay layer and sandy gravel, cobble layer and the weathered strata. The Rotary Drilling Rig are widely used on the roads, large bridges, piers, high-rise building, water conservancy and other infrastructure construction projects.

Technical Parameters;

model	unit	DBR220
Chassis models		BONNYZJ25B-7 213kw
The main pump	Germany Rexroth	A11VLO260
Max diameter of holing	mm	2300
Max depth of holing	m	70
Maximum output torque	kN.m	250
Drilling speed/high-speed	rpm	7-26
Max stress	kN	180
Max pulling force	kN	240
Pressurized cylinder trip	mm	5300
Max around Angle	°	±6°
Max tilted forward Angle	°	±5°
Promoting force of main windlass	kN	240
Diameter of steel wire rope of main windlass	mm	28
Max promoting speed of main windlass	m/min	70
Promoting force of subsidiary windlass	kN	110
Diameter of steel wire rope of subsidiary windlass	mm	20
Max promoting speed of subsidiary windlass	m/min	70
Working state equipment height	mm	21045
Working state device width	mm	4400
Transportation state equipment length	mm	15144
Transportation state equipment height	mm	3520
Transportation state device width	mm	3200
Crawler board length	mm	5538
Crawler board width	mm	800
The system pressure	bar	343
Guiding pressure	bar	40
traction	kN	440
The weight of the	TT	70
Optional drill pipe	Friction type	D440-5×14.5D440-5×14
	lock type	D440-4×14.5D440-4×14

convenient driver's cab makes driving comfortable

America Cummins world--famous engine with high power, low noise and low emission

Freely flexible track frame and solid and durable chassis

Intelligentized operating hydraulic system and electrical system.