4t Crane Made in China by Hsjj Qtz4708

Model NO.: QTZ4708 Condition: New Maximum Lifting Weight: <5t Moving Type: Fixed Material: Chinese Famous Steel Company Hoist Mechanism: Brake Wheel Slewing Mechanism: Winding Motor and Hydraulic Transmission Safety Devices: a Complete Set of Safety Devices Trademark: HSJJ Origin: China Certification: SGS, CE, ISO9001, Tur Maximum Lifting Height: 100-150m Installation: Assembled Type: Top-Slewing Crane Electrical Mechanism: Siemens or Schneider Trolley Mechanism: Free Maintenance Planetary Reducer and Cone Brake Operation Device: Good for Operator Crane in Free Standing Height: 29m Specification: ISO9001, CE, SGS HS Code: 84262000 4t Crane Made in China by Hsjj Qtz4708
1  Lifting Technical Performance
1.1  Lifting characteristic list
(A)4-line

range (m)	3-10.96	11	12	13	14	15	16	17	18	19
Load  (t)	4	3.986	3.638	3.343	3.09	2.87	2.68	2.51	2.36	2.23
range (m)	20	21	22	23	24	25	26	27	28	29
Load  (t)	2.106	1.996	1.897	1.806	1.723	1.646	1.576	1.510	1.449	1.393
range (m)	30	31	32	33	34	35	36	37	38	39
Load  (t)	1.34	1.29	1.24	1.200	1.159	1.121	1.084	1.050	1.017	0.986
range (m)	40	41	42	43	44	45	46	46.8
Load  (t)	0.957	0.929	0.902	0.877	0.852	0.829	0.807	0.790

 
(B) 2-line

range (m)	3-20.97	21	22	23	24	25	26
Load  (t)	2	1.996	1.897	1.806	1.723	1.646	1.576
range (m)	27	28	29	30	31	32	33
Load  (t)	1.510	1.449	1.393	1.34	1.29	1.24	1.200
range (m)	34	35	36	37	38	39	40
Load  (t)	1.159	1.121	1.084	1.050	1.017	0.986	0.957
range (m)	41	42	43	44	45	46	46.8
Load  (t)	0.929	0.902	0.877	0.852	0.829	0.807	0.790

 
 

1.2   Performance and Technical Parameters List of Crane

Item

unit

multiplying factor

α=2

α=4

Rated lifting torque Kn.m

KN.m

400

max. lifting capacity

t

2

4

working range

m

3 - 46.8

lifting capacity at jib tip

t

0.79

max. Capacityon jib range

m

20.97

10.96

crane height

free standing

m

30

with wall tie in

120

60

outline dimension

foundation frame

m

6.0×6.0

Total height

free standing

38.284

with wall tie in

120

jib tip to slewing center

47.74

counter arm tip to slewing center

12.816

dead load

free standing

t

21.5

with wall tie in

t

42.7

counter weight

t

7.2

others

total motor  power

kW

25.82

Allowed wind scale

windscale

≤6

allowed working temperature

Deg c

-20~40

 

 mechanism table

mechanism load		Lifting Mechanism		JC  40%
		Slewing Mechanism		JC  40%
		Trolley Traveling Mechanism		JC  40%
lifting mechanism	motor	type			YZTD225-4/8/32
		Rotator speed	r/min		1400	700		140
		power	kW		15	15		3.5
	reducer	center distance	mm		460
		driving ratio	i		12.25
	roller	diameter	mm		Φ330
		rolling layer	layer		4
		line capacity	m		280
		rotator speed	r/min		114	57		11.4
	Brake	type			YWZ-250/45-10
		brake force	N		450
	wire rope	pull force	N		10000
		dimension			6×19-11-1770-I
	lifting speed		m/min		65.1/31.9	32.6/15.9		13.0/6.4
	rated lifting capacity		t		0.8/1.6	2/4		2/4
	steady decline lowest speed		m/min		≤7
	dead load		t		1.2
Slewing mechanism	motor	type			YD132M-4/8
		Rotation rate	r/min		1440		720
		Power	kW		4.5		3
	reducer	type			XX-10.180
		Transmission ratio	i		180
		outlet torque	N·m		8000
	slewing bearing	type	HSW.30.1220
	pinion	modulus	m		10
		teeth	z		13
		modification coefficient	x		+0.5
	hydraulic coupling	type	YOX250A
	slewing speed		r/min		0.75		0.38
	amount		unit		1
Ranging mechanism	motor	type			YD100L2-4/6
		rotation speed	r/min		1440		960
		power	kW		2.2		1.5
	reducer	type	WCJ120
		transmission ratio	39
	wire rope	dimension			6×19-7.7-1550
		rope speed	m/min		38.6/25.2
	ranging speed		m/min		38.6/25.2
hydraulic tank station	hydraulic pump station	working pressure	MPa		20
		power	kW		3
		type of oil tank	GB306
	hoisting oil tank	rated pressure	MPa		20
		diameter of oil tank	mm		Φ125
		diameter of pole	mm		Φ90
		traveling distance	mm		1300
		installing distance	mm		1700
		hoisting speed	m/min		0.4
		max. hoisting force	t		24.6

2.Description of QTZ series Tower Crane
 
1) the tower crane is one of the most popular type and hot-selling self-erecting tower crane, which is researched and designed by Institute of Building Mechanization of China Academy of Building Research. It absorbs many advanced technology both from China mainland and abroad.
2) We adopt to use Dual drawbars structure on lifting boom, which enables the lifting boom to be unfer no stress at lifting surface other than uniaxial stress, and moreover, it gets rid of the stress peak. It greatly improves the fatigue safety performance of lifting boom.
3) Adopts VVVF stepless speed variation device for lifting, radius changing and slewing mechanisms, to make sure it works steadily and effectively, it also lowers the maintenance cost.
4)We can offer crane standard sections such as the FO/23B standard sections for customers to choose from.
 
3. Service
1.) Providing timely delivery, standby engineers are ready to solve any problems
2.) Providing 12 (twelve only)months product warranty period,with ample spare parts
3.) Providing work site installation guidance and training of operation and maintenances

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