·super-long crane beam(42、46.8m), coverage area is big·stand knot section is broad (1500×1500)，rigid is good. the whole machine is stable and swing small wen lifts.
·materials of main limbof model of standard knot(∠140×140×10 or ∠140×140×12)
·electrical system uses good quality components, performance is stable and reliable.·the whole machine

parameters' names	parameters
Model	QTZ40A	QTZ40B
Maximum rated torque (KN.m)	400
maximum lifting load (t)	(a=4),4 ; (a=2),2
maximum working amplitude( m)	42	46.8
rated payload capacity at maximum amplitude (t)	0.8	0.79
maximum hoisting height (m)	30/80	30/120
hoisting speed (m/min)	(a=2),50/25/7.7 ;(a=4),25/12.5/3.8
radius changing speed (m/min)	16.5/24.6	22/33
swiveling speed (r/min)	0.40/0.53
raising speed (m/min)	|0.4
total motor power(kw)	25.1
working voltage (v)	~380V±10%