How to select long reach boom arm for excavator

Excavator with standard boom arm used to dig trench, hole and foundation or to handle material, standard excavator perform well in these project, as you know, for some special project like river dredging, deep foundations, standard boom arm are unable to reach so long distance, you may think a longer boom arm is helpful here, actually, many excavator owners has sets of boom arm options: original standard boom arm, long reach excavator boom arm, 

so how many meters long reach boom arm suitable for your excavator? as you know excavator is a complicated lever, first you should know your excavator operate weight that is key factor to decide long reach boom length and load weight, with our  several years of experiences of making excavator long reach boom arm, we make below parameter figure for your reference. 

if you want a bigger bucket, you can add counterweight or choose shorter long booom arm, please E-mail us for special long reach configuration, we will provide suitable solution for your excavator, and if your excavator operating weight is not listed in below table, please contact us, we will calculate and suggest suitable long boom arm length for your excavator, our website http://www.longreachboom.com 

Technical Parameter For Long Reach Boom arm
Excavator Operating Weight(Ton) Parameter	12T	20T	22T	30T	35T	40T	45T
Total Length of Boom&Arm	13000	153800	153800	18000	20000	22000	24000
Weight(KG)	3000	4000	4200	5200	6000	6500	7000
Bucket capacity(M3)	0.3	0.4	0.4	0.4	0.5	0.6	0.6
C Max. Digging Height(mm)	11300	12510	12610	13720	14920	16100	17300
A Max. Forward Reach (mm)	12500	15100	15100	17600	19600	21600	23600
B Max. Digging Depth(mm)	9000	113400	11370	13000	15000	16500	18000
D Overall Height(mm)	2900	2980	3040	3210	3210	3400	3400