4ton VF electric self-rising tower crane

1.top 10 in China., 2.4ton VF electric self-rising tower crane, 3.with BV certification - details see: https://www.machineto.com/4ton-vf-electric-self-rising-tower-crane-10103816

Feature:Tower Crane	Condition:New	Application:various construction plant	Max. Lifting Load:4T
Max. Lifting Height:136m	Span:47m	Place of Origin:Hunan China (Mainland)	Brand Name:CCBT
Model Number:QTZ40B(TC4708)	Certification:BV certification	Warranty:One year	After-sales Service Provided:Engineers available to service machinery overseas
color:yellow	stationary height:34m	tip load:0.8T	Max. load:4T
Max. range:47m	counter weight:8.30T

QTZ series of tower crane is one of CCBT’s leading products. With the working radius varying from 30m to 60m, QTZ tower crane is famous for its large operating ranges, varied working methods and wide uses. This series of tower crane has a horizontal jib frame, a jib trolley radius-changing mechanism. It is original in design, reliable in operation and satisfactory in shape. Equipped with all necessary safety devices, it shows a good speed-control capacity, satisfactory operating stability and high work efficiency. It can be widely used for the construction of high-rise hotels, residential buildings, high-rise industrial buildings, large-span factory building and tower-like buildings like tall chimneys.

4ton VF electric self-rising tower crane

ALL equipped safety devices are complete, such as weight limiter, height limiter, radius limiter, slewing limiter, rope-break-proof device, axle-break-proof device, slewing brake, traction brake and similar safety guards. Which are mechanical or mechanical-electrical integrated products and adapt to all badly conditions to ensure the tower crane working reliably.

Main technical parameters of tower crane QTZ40B(TC4708)

Model	QTZ40B(TC4708)
Max Working Radius (m)	47
Free Height Under Hook (m)	34 (13 mast sections)
Max Load (T)	4
Tip Load (T)	0.8
Max Height Under Hook (m)	136
Wall Ties for Max Height (sets)	6
Main Material Specs (mm)	Angle Steel 160*12
Mast Section Dimension (m)	1.51.52.2
Hoisting Speed (m/min)	70/35/9
Min Steady Falling Speed (m/min)	4.5
Slewing Speed (r/min)	0-0.75
Radius-changing Speed (m/min)	40/20
Jacking-up Speed (m/min)	0.5
Total Motor Power (kw)	21.1
Independent Structure Weight (kg)	22780
Counter Weight (T)	8.30
Containers for Shipment (Free Height)	4*40’HQ

Advantages are as follows:

* Modular system

* World-wide exchangeable with CCBT Tower Crane
* Intelligent inverter , not only knows the speed but the loads
* Potential meter control
* Close loop control
* Position mode
* RCV Control
* Eddy current brake
* Soft start and stop
* Automatic gear change
* High efficiency, reliable, Lower energy cost