Hammerhead Tower Crane, QTZ40 TC4808-4 Manufacturer

Hammerhead Tower Crane, QTZ40 TC4808-4

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, QTZ40 TC4808-4

Overview

QTZ40 TC4808-4 hammerhead tower crane consists of a horizontal arm, a jib, a hoisting mechanism, a trolleying mechanism, a slewing mechanism, a hydraulic jacking system, a cabin and safety devices. As a high-level slewing tower crane, it is widely used for constructions of high-rise restaurants, civilian buildings and industrial buildings. It is an ideal choice for small and middle-size construction enterprises.

Our tower crane has many advantages. First, the jib, which is held by rigid duplex pull rods, features good rigidity, light weight, small cross section, small wind resistance, uniform force distribution and good-looking appearance. The maximum hook radius reaches 48 meters, which makes the crane suitable for many engineering projects. Further, the hoisting mechanism can ensure low-speed heavy loading and high-speed light loading with the help of a three-speed motor and a single-stage gear reducer. The maximum hoisting speed reaches 62.5 m/min. Thirdly, the operators cabin runs along the horizontal arm with traction by the trolleying mechanism, which facilitates perfect positioning. The cabin is installed separately at one side of the tower to ensure full view, which provides the operator with a comfortable and convenient working environment. Equipped with a planetary reducer and a hydraulic coupler, the slewing mechanism achieves great bearing capacity, smooth startup, reliable performance, wind resistance and accurate positioning. Lastly, the construction tower crane is designed with various built-in safety devices to ensure a safe and reliable working environment.

Moreover, the hydraulic jacking system manages to lift the tower by adding mask sections. In this way, the top-slewing crane can rise with a building's ascending. In addition, it can be fixed on a base or attached to an external wall. Hence, it is extensively applied for different construction projects. Its freestanding height is 30 meters, while its attached height can be 140 meters and 60 meters respectively for situations with multiplier as 2 and 4.

Mast Section
Jib
Tower Head
Detail Description
Package

Technical Parameters

Hammerhead Tower Crane Specifications
Total Power: 25.1kW
Voltage: 380V10
Frequency: 50Hz/60Hz

Technical Parameters

Multiplying			2	4
Rated Load Moment		kNm	400
Maximum Hoisting Capacity		t	2	4
Radius at Maximum Hoisting Capacity		m	21.1	11.29
Tip Load		t	0.76	0.75
Hook Radius		m	3- 48
Freestanding Height			30
Hoisting Speed		m/min	9.3/4.6 31/15.5 62.5/31.3
Slewing Speed		r/min	0.6
Trolleying Speed		m/min	20/40
Minimum Steady Descending Speed			<8.5
Overall Dimension	Base	m	5 5 1.1
	Total Height		37.27
	Distance between Jib Tip to Slewing Center		48.87
	Distance between Balance Arm Tip to Slewing Center		11.18
Overall Weight	Structure Weight	t	Cross Shaped Chassis18.9/Double Cross Shaped Chassis18.4
	Counter Weight		9.12
Others	Total Motor Power	KW	25.1
	Maximum Working Wind Speed	m/s	20
	Maximum Jacking Wind Speed		12
	Working Temperature		-20 C - 40 C

Support Mechanisms

Loading Rate	Hoisting Mechanism			JC 40%
	Slewing Mechanism			JC 40%
	Trolleying Mechanism			JC 40%
Working Grade	Hoisting Mechanism			M
	Slewing Mechanism			M
	Trolleying Mechanism			M
	Hydraulic Jacking System			M
Trolleying Mechanism	Traction	N		4000
	Motor	Speed	r/min	1380	720
		Power	kW	2.4	1.5
	Reducer	Reduction Ratio		54
	Steel Wire Rope	Specification		6X19W-7.7-1550-FC-ZS
		Line Speed		m/min	31/16
	Trolleying Speed	m/min		31/16
Hoisting Mechanism	Motor	Model		YZTD200L2-4/8/24
		Speed	r/min	1420	700	210
		Power	kW	15	15	4
	Reducer	Center Distance	mm	500
		Transmission Ratio	i	15.2
	Winch Drum	Diameter	mm	405
		Layer of Rope	Layer	4
		Rope Capacity	m	280
		Speed	r/min	95	47	14.5
	Brake	Model		YWZ3-250/45
		Braking Force	N	450
	Steel Wire Rope	Traction	N	10000
		Specification		6X19W-11-1770-FC-ZS
	Hoisting Speed		m/min	62.5/31.3	31/15.5	9.3/4.6
	Rated Hoisting Capacity		T	0.75/1.6	2/4	2/4
	Minimum Steady Descending Speed		m/min	<8.5
	Total Weight		t	0.91
Slewing Mechanism	Motor	Model		YZR132M2-6
		Speed	r/min	910
		Power	kW	3.7
	Reducer	Model		XX4-100
	Transmission Ratio		i	157
	Output Torque		N m	10000
	Wheel Gear	Module	m	10
		Tooth Number	z	13
		Modification Coefficient	x	0.5
	Hydraulic Coupler	Model		YOX280
	Matched Slewing Bearing	Model		011.40.1120
	Slewing Speed		r/min	0.6
Hydraulic Jacking System	Hydraulic Pump Station	Working Pressure	MPa	22
		Power	kW	4
	Hydraulic Cylinder	Rated Pressure	MPa	22
		Diameter	mm	125
		Rod Diameter	mm	90
		Stroke	mm	1320
		Installation Distance	mm	1700
		Jacking Speed	m/min	0.4-0.7
		Maximum Jacking Capacity	t	27

Hoisting Characteristics

Multiplying 2
Radius (m)	3 21.1	22	23	24	25	26	27	28	29	30	31	32	33	34	35
Hoisting Capacity (Kg)	2000	1907	1812	1726	1647	1575	1507	1445	1387	1333	1284	1238	1194	1153	1115
Radius (m )	36	37	38	39	40	41	42	43	44	45	46	47	48
Hoisting Capacity (Kg)	1079	1044	1012	981	952	925	898	873	849	826	805	784	764
Multiplying 4
Radius (m)	3 11.29	12	13	14	15	16	17	18	19	20	21	22	23	24	25
Hoisting Capacity (Kg)	4000	3736	3416	3145	2912	2710	2533	2376	2237	2112	1999	1897	1805	1720	1642
Radius (m)	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40
Hoisting Capacity (Kg)	1571	1504	1443	1386	1333	1283	1236	1192	1150	1111	1074	1040	1007	975	946
Radius (m)	41	42	43	44	45	46	47	48
Hoisting Capacity (Kg)	918	891	865	841	818	795	774	754

Hoisting Characteristics Curves

QTZ40 Hammerhead Tower Crane Moment Curve (Multiplying 2)

QTZ40 Hammerhead Tower Crane Moment Curve (Multiplying 4)

Components