Junttan HHK AL-Series Hydraulic Impact Hammers

The HHK AL-series is a new generation of hydraulic impact hammer with an adjustable stroke of up to 2.6 ft (0.8 m) and an open hammer body.  This hammer type can be delivered also with a stroke of 3.9 ft (1.2 m). Because of the lower stroke, the hammer is shorter than traditional hammers.

The open hammer body makes the hammer lighter and allows higher pile weights than the heavier traditional free-fall hammer.  It is suitable for driving all types of piles including precast concrete, steel tube, sheet and timber piles.

The design of the hammer frame and drive cap makes for low impact noise and less vibration while piling as all impact energy is concentrated in the center of the pile. The construction of the hammer also makes it possible to use biodegradable hydraulic oils and it is easy to connect to different hydraulic systems. It can be operated by the hydraulic system of the rig or by a separate power pack and can be mounted on all kinds of leaders or freely suspended.