Tower Crane

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Tower Crane

QTZ125 tower crane is an upper-slewing fixed type light crane that is widely used for constructing various kinds of industrial and civil buildings. Due to its compact structure, the crane is especially suitable for construction sites with tight space and complicated landform.

The tower crane consists of lifting, slewing and luffing mechanisms, which can work respectively or together for higher efficiency. The lifting mechanism adopts a double speed motor to achieve fast hoisting and slow motion speeds. The jib can rotate 360° freely. The reliable horizontal jib frame and flexible travel trolley help ensure the accurate operation of the crane. The tower crane can satisfy both vertical and horizontal transportation needs.






Technical Parameters of QTZ125 Tower Crane

Item Unit 2multiplying power 4multiplying power
Rated lifting moment kN.m 1250
Maximum lifting weight t 5 10
Working range m 3~60
Lifting weight at maximum range t 1.803 1.769
Range of maximum lifting weight m 27.155 14.867
Lifting height Independent type m 50
Attached type 180 90
Lifting speed m/min 104/52.05 50.05/25.02
Slewing speed r/min 0.61
Luffing speed m/min 58.6/29.3/8.79
Jacking speed 0.4
Minimum stable falling speed ≤5
Whole machine shape size Underbed m 7.76x7.76
Whole machine height(independent) 60.502
Lifting arm end to slewing center 61.383
Tail of balance arm to slewing center 14.82
Dead weight Structure weight(independent) t 53.506
Balance weight Max range 60m 18.5
Max range 56m 16.7
Max range 50m 13.9
Electric motor total capacity kW 60.85
Permitted working temperature -20~+40
Wind scale at max installing height when installing, dismantling, jacking or declining section Scale ≤4
Working condition wind scale ≤6
Non-working condition wind scale ≤11
Power supply parameter ~380V±10%, 50Hz

Fittings List 

Mechanism load ability Lifting mechanism M5
Slewing mechanism M4
Luffing mechanism M4
Lifting mechanism Electric motor Type YZRDW280M-4/8-55/55
Power (kW) 55/55
Height limiter Type FKDX-G
Steel rope Specification 6X37-16-1770
Max. traction force(N) 25000
Multiplying power a=2 a=4
Lifting speed (m/min) 104 52.05 50.05 25.02
Rated lifting weight(t) 2.5 5 5 10
Min. stable falling speed m/min ≤5
Slewing mechanism Electric motor Type YZR160M1-6
Power (kW) 5.5×2
Rotating speed (r/min) 908
Speed reducer Type XX4-120AI
Transmission ratio 195
Hydraulic coupling Type YOX280A
Slewing small gear Modulus m 12
Tooth quantity z 17
Modification coefficient +0.5
Slewing speed r/min 0.61
Slewing bearing Single-row four-point contact ball type slewing bearing Type 011.45.1400
Modulus m 12
Tooth quantity z 131
Modification coefficient +0.5
Hydraulic jacking mechanism Electric motor Type Y132M2-6
Power (KW) 5.5
Oil cylinder rated working pressure Mpa 30
Max. jacking force T 60
Oil cylinder stroke Mm 1600
Installation distance Mm 2070
Oil cylinder diameter Mm φ160
Oil cylinder piston diameter Mm φ110
Jacking speed m/min 0.4
Luffing mechanism Electric motor Type YZTDE180M-4/8/24
Power (KW) 5/3.7/1.1
Steel rope Type 6×19-9.3-1550
Speed reducer Type XX3-14.40
Transmission ratio 39.7
Luffing speed m/min 58.6/29.3/8.7

Lifting Performance Table

Range (m) 4 multiplying power (t) 2 multiplying power(t)
3~14.867 10 5
15 9.903 5
16 9.225 5
17 8.627 5
18 8.095 5
19 7.620 5
20 7.192 5
21 6.804 5
22 6.452 5
23 6.131 5
24 5.836 5
25 5.565 5
26 5.314 5
27 5.083 5
27.155 5.049 5
28 4.868 4.823
29 4.667 4.668
30 4.480 4.446
31 4.305 4.315
32 4.141 4.275
33 3.987 4.116
34 3.842 3.824
35 3.706 3.691
36 3.576 3.565
37 3.454 3.446
38 3.339 3.333
39 3.229 3.226
40 3.125 3.125
41 3.025 3.028
42 2.931 2.936
43 2.841 2.848
44 2.755 2.764
45 2.673 2.684
46 2.594 2.607
47 2.519 2.534
48 2.447 2.464
49 2.378 2.396
50 2.311 2.332
51 2.247 2.270
52 2.186 2.210
53 2.127 2.152
54 2.070 2.097
55 2.015 2.043
56 1.963 1.992
57 1.912 1.942
58 1.862 1.894
59 1.815 1.848
60 1.769 1.803

As a major tower crane manufacturer based in China, we also provide topless tower crane, concrete mixer, concrete batching plant, wheel loader, and more.

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