Rotary Drilling Machine

Description
Rotary drilling machine with the special lubricating system makes sure that it can work in high-temperature environment. Rotary drive is available in three drilling modes-standard, low speed and big torque or high speed and small torque.

Features
1. Spin-off is optional.
2. The removable key of rotary drive and symmetry structure design double its service life.
3. The main winch has highlights of touch-bottom protection, priority control and fast line speed.
4. Crowd cylinder has two operation modes--normal lifting and fast lifting to improve push efficiency.
5. Mast features automatic erecting, lying and vertical adjustment to ensure the accuracy requirements in construction.
6. Balance control system of the whole machine is available.

Technical Parameters of Rotary Drilling Machine

Main performances	Unit	Parameters
Overall	mm	22,027
Operating weight	t	74
Max. pile diameter	mm	2,300
Max. pile depth(friction Kelly/inter-locking Kelly)	m	69/54
Rotary Drive
Max. output torque	kN.m	250
Speed of rotation	rpm	7 to 26
Crowd system
Crowd force	kN	208
Line pull	kN	200
Stroke	mm	5,300
Main winch
Line pull(1st layer)	kN	256
Rope diameter	mm	32
Max. line speed	m/min	63
Auxiliary winch
Line pull(1st layer)	kN	110
Rope diameter	mm	20
Max. line speed	m/min	70
Mast inclination
Forward		5
Lateral		±5

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