Tower Crane QTZ40

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, QTZ40 (TC4810/5008)

Features
The QTZ40 hammerhead tower crane has a vertical arm support, hydraulic jack-up system, and a trolley. The self-erecting crane's maximum lifting momentum is 400kN·m. When used alone, its lifting height is 29m, and with attachments the slewing tower crane can reach up to 120m. Designed with computer software specifically for tower cranes, our horizontal jib crane is precision-made and durable.

Load Performance of the Hammerhead Tower Crane
Load Charts
Load chart of tower cranes with 4-fall hook block

Radius (m)	3-14.79	15	16	17	18	19	20
Load (t)	4	3.94	3.67	3.44	3.23	3.04	2.87
Radius (m)	21	22	23	24	25	26	27
Load (t)	2.72	2.58	2.45	2.34	2.23	2.13	2.04
Radius (m)	28	29	30	31	32	33	34
Load (t)	1.95	1.87	1.80	1.73	1.67	1.61	1.55
Radius (m)	35	36	37	38	39	40	41
Load (t)	1.50	1.45	1.40	1.35	1.31	1.27	1.23
Radius (m)	42	43	44	45	46	47	48
Load (t)	1.19	1.15	1.12	1.09	1.06	1.03	1.00

Load chart of tower cranes with 2-fall hook block

Radius (m)	3-27.3	28	29	30	31	32	33
Load (t)	2	1.94	1.86	1.79	1.72	1.66	1.60
Radius (m)	34	35	36	37	38	39	40
Load (t)	1.54	1.49	1.44	1.39	1.35	1.30	1.26
Radius (m)	41	42	43	44	45	46	47
Load (t)	1.23	1.19	1.15	1.12	1.09	1.06	1.03
Radius (m)	48
Load (t)	1.00

Technical parameters and detailed technical tables of tower crane mechanisms

Item				Unit	Magnification
					α=2	α=4
Rated load moment				KN. m	540
Max. load				t	2	4
Work radius				m	3 – 48/50
Load at max. radius				t	1.0
Radius at max. load				m	27.3	14.79
Hoisting height			Independent	m	30
			Adhered		120	60

Outer size of whole crane	Chassis		m	6.0×6.0
	Height of whole crane	Independent		38.284
		Adhered		128.284
	Tip of jib to the slewing center			48.74
	Tip of balanced jib to slewing center			11.425
Self-weight of whole crane		Independent	t	21.41
		Adhered	t	46.36
Balanced weight			t	8.0
Other		Total power of motors	kW	25.1
		Work grade at max. height	Grade	≤6
		Allowable work temperature	℃	-20 ~ 40

Mechanical load factor	Hoisting mechanism			JC 40%
	Slewing mechanism			JC 40%
	Trolleying mechanism			JC 40%
Hoisting mechanism	Motor	Type		YZTD200L₂-4/8/24
		Speed	r/min	1440	720	220
		Power	kW	15	15	4
	Reducer	Center distance	mm	460
		Transmission ratio	i	12.25
	Drum	Dia .	mm	Φ330
		Layers of rope		4
		Capacity	m	280
		Speed	r/min	114	57	11.4
	Brake	Type		YWZ-250/45-10
		Braking force	N	450
	Steel wire rope	Tractive force	N	10000
		Spec.		6×19-12.5-1770- Ⅰ
	Hoisting speed		m/min	65.1/31.9	32.6/15.9	13.0/6.4
	Rated load		t	0.8/1.6	2/4	2/4
	Min. stable descending speed		m/min	≤7
	Total weight		t	1.2
Slewing mechanism	Motor	Type		YZR132M-6
		Speed	r/min	908
		Power	kW	3.7
	Reducer	Type		H-100
		Transmission ratio	i	195
		Outputing torque	N·m	10000
	Slewing bearing	Type		QW.40.1120
	Small pinion gear	No. of modulus	m	10
		No. of teeth	z	13
		Modification coefficient	x	0.5
	Hydraulic coupler	Type		YOX280A
	Slewing speed		r/min	0.6
	QTY of installation		set	1
Trolleying mechanism	Motor	Type		YD100L₂-4/6
		Speed	r/min	1440		960
		Power	kW	2.4		1.5
	Reducer	Model		WCJ120
		Transmission ratio		39
	Steel wire rope	Spec.		6×19-7.7-1550-I
		Line speed	m/min	38.6/25.2
	Trolleying speed		m/min	38.6/25.2
Hydraulic jacking mechanism	Hydraulic pump	Work pressure	MPa	20
		Power	kW	4
		Type of oil pump		GB306
	Jacking cylinder	Rated pressure	MPa	20
		Dia . of cylinder	mm	Φ125
		Dia . of piston rod	mm	Φ90
		Stroke	mm	1300
		Erection distance	mm	1700
		Jacking speed	m/min	0.4
		Max. Jacking force	t	24.6