Junttan hydraulic impact hammers - Vroom Funderingstechnieken
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Junttan hydraulic impact hammers

The table shows the specifications of Junttan hammers HHK3, HHK4, HHK5, HHK6 and the new generation HHK3A, HHK5A, HHK7A, HHK9A and HHK12A.

Junttan has developed a new generation of type-A impact hammers that perform up to 20% better, compared with 'traditional’ hammers of the same weight. The impact hammers are suitable for driving vibrated-pile casings, pre-fab concrete piles and timber piles with pile caps.

The table shows the actual free-fall blow energy generated by the Junttan HHK3, HHK3A, HHK5A, HHK7A and HHK12A hydraulic impact hammers.

Drop Drop speed Number of blows HHK4 HHK5 HHK6 HHK7a
in m' m⁄sec p⁄min energy kNm. energy
kNm.
energy
kNm.
energy 
kNm.
0,20 1,80 91 6,48 8,10 9,72 16,94
0,30 2,40 71 11,52 14,40 17,28 23,66
0,40 2,70 59 14,58 18,23 21,87 31,50
0,50 3,10 54 19,22 24,03 28,83 38,12
0,60 3,30 48 21,78 27,23 32,67 45,36
0,70 3,60 44 25,92 32,40 38,88 50,54
0,80 3,80 38 28,88 36,10 43,32 58,84
0,90 4,10 35 33,62 42,03 50,43 64,72
1,00 4,30 32 36,98 46,23 55,47 70,88
1,10 4,40 30 38,72 48,40 58,08 77,32
1,20 4,50 28 40,50 50,63 60,75 84,04