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tower crane, 1.CE,CQC, ISO Certification, 2.Factory was founded at 1961,1600 workers., 3.Perfect after-sales service - details see: https://www.machineto.com/tc4708a-qtz40-construction-tower-crane-10101176

tower crane

Features:

This series of tower cranes has a horizontal jib frame, a jib-trolley radius-changing mechanism and a hydraulic self-raising mechanism. It is original in design, reliable in operation and satisfactory in shape. Equipped with all necessary safety devices, these cranes show a good speed-control capacity, satisfactory operating stability and high work efficiency.

Components :
1. Hoisting System
2. Climbing System
3. Trolley System
4. Slewing System
5. Electrical System
6. Crane Jib
7. Counter Jib
8. Mast Sections
9. Tower Head
10. Control Cabin

Specification:

Model	TC4810(QTZ50)	TC4708(QTZ40)	TC4708A(QTZ40)
Amplitude (M)	48	47	45
Independent Height (M)	35	32.5	32.5
Max. Height (M)	140	100	100
Max. Lifting Capacity (T)	6	4	4
Assistant Support Frame	4	4	4
Main Material	135×135×10 (square steel tube) Reinforcing mast section 135×135×12 (square steel tube)	160×160×12 Angle steel	160×160×12 Angle steel
Standard Mast Section Dimension	1.835×1.835×2.5	1.5×1.5×2.5	1.5×1.5×2.5
Lifting Speed (a=2)(m/min)	76/36/8	69.4/34.7	76/38/10
Slewing Speed (r/min)	0.64	0.62	0.77
Trolley Travel Speed (m/min)	42/21	38/19	21.6/43.2
Max. Lifting Moment (KNm)	500	400	400
Working Temperature (C)	-20~+40	-20~+40	-20~+40
Undercarriage Form	Type A. Cross-shaped beam with slanting strut and ballast Type B. Cross-shaped beam with slanting strut but no ballast Type C.#-shaped beam without ballast	Type A. Cross-shaped beam with slanting strut and ballast Type B. Cross-shaped beam with slanting strut but no ballast Type C.#-shaped beam without ballast	Type A. Cross-shaped beam with slanting strut and ballast Type B. Cross-shaped beam with slanting strut but no ballast Type C.#-shaped beam without ballast

After-Sales Service :
1. Erection and Commissioning
2. Operator Training
3. Overhual

Zhengzhou Mega Industry Co., Ltd.is specified in machinery producing and fused alumina producing.Our factory is founded at 1961,covers 160000m2,has 1600 employees.