The hammer grab is the most important tool in pile construction and it determines the drilling progress. The LEFFER hammer grab combines the advantages of a number of good hammer grabs and, due to its special characteristics, is a universial hammer grab of top class.
These are essential advantages:
There is no closing cable subject to frequent replacement inside the grab.Opening of the jaws is assisted by a pretensioned spring, so that adhesive soils are dumped by forcefully striking open the jaws.The body of the grab is streamlined, which ensures a high fall velocity under water.Additional side pockets on the grab's lower part increase the filling capacity of the jaws in soft soils.The entire construction is stress relieved and extremely strong.
Robust free-fall grab with high clamping force, particularly suitable for drilling of holes in rocky soils and for working under water load. The pulleys are maintenance-free, oil-filled life-time bearings.