1. YTR230D/YTR300D rotary blasthole drilling rig adopts parallelogram structure of dual boom, which is featured with good flexibility and high construction efficiency. At the same time, torsional capacity of luffing mechanism is enhanced to make it more suitable for hard rock construction in the southwest region.

2. Power head adopts two sets of motors and two-speed reducer to realize powerful and safe operation and high transmission efficiency; three level controls can be chosen according to various soil layers and operation conditions to greatly enhance the construction efficiency.

3. Impact winch is fitted with freefall releasing reducer. When confronting with hard rock, the impact winch can break rock and then collect broken bits with the drilling bucket, which will improve rock breaking efficiency; when facing with pebble bed construction, the impact winch can be used for percussion and squeezing to form protection wall; When confronted with backfill soil construction, the impact winch can be used for percussion and compaction to form solid protection wall and avoid landslides.

4. The rotary drilling rig is equipped with telescopic chassis to meet various transportation conditions and widen the whole machine to 4.3m at work and enhance machine stability and construction safety;

5. Casing tube is optional, which may help to carry out the full casing tube construction method;

6. The main winch positioned in the rear adopts stretched large diameter drum to realize the single layer steel rope winding, which can greatly increase the service life of steel rope.

7. The YTR230D/YTR300D rotary blasthole drilling rig adopts centralized lubrication to realize easy maintenance and enhance its detachability and serviceability.

8. Forehead oil cylinder is added to realize automatic folding mast of the pulley yoke, reduce labor intensity and increase work efficiency.

9. Supporting oil cylinder is additionally fitted to realize supporting when the impact winch is at work so that the machine is more stable by reducing vibration.

Model		Unit	YTR230D	YTR300D
Max. drilling diameter		mm	2000	2500
Max. drilling depth		m	52/68	30/52/76
Engine	Model		DE12TIA	DE12T
	Manufacturer		Doosan South Korea	Doosan South Korea
	Power	kW	230	260
Power head	Max. output torque kN·m	kN.m	230	300
	Drilling speed	r/min	7~35	6~31
Oil cylinder	Max. pressure	kN	215	215
	Max. hoist capacity	kN	230	230
	Forcing stroke	mm	5330	5330
Main winch	Lifting power	kN	240	280
	Max. hoisting speed	m/min	65	65
	Diameter of wire rope	mm	28	36
	position		rear	rear
Auxiliary winch	Lifting force kN	kN	100	100
	Max. lifting speed	m/min	50	70
	Diameter of wire rope	mm	26	26
Mast	Forwards inclination	°	3	5
	Angle of inclination(both left and right)	°	±3.5	±3.5
Chassis	Model
	Width of track shoe	mm	800	800
	Pulling force	kN	410	570
	Wheel track	mm	4950	5000
Dimension	Width of the machine while working	mm	4300	4300
	Height of the machine while working	mm	22420	20600/22300
	Length of the machine while transportation	mm	16070	17260/19710
	Height of the machine while transporting	mm	3575	3700
	Width of the machine while transporting	mm	3000 3300	3000
Weight	Working condition	t	72	100
	Transportation condition	t	60.8	85
Standard drill pipe specification			Lock bar φ440-4X14.5m-200B	12m 3 jointφ508 lock-type drilling pipe
Longest lockbar specification			Lock bar φ440-4X15m-200B	14.5m 4 jointφ508 lock-type drilling pipe