The core lifter assembly includes three key parts that allow you to firmly grip the core sample so that it can be broken and brought to the surface. The correct gap between the core lifter, the core lifter case and the stop ring is essential– using the same supplier for all three parts is strongly recommended and will ensure optimal performance.
This ring ensures that the core lifter stays in the core lifter case. It is easily inserted into the grooved space provided in the core lifter case.
The core lifter is one of the most important parts for core recovery. The inside of the lifter comes in two styles, slotted and fluted (also known as broached), to ensure a good grip regardless of the ground conditions. A core lifter that is slotted is good for competent soil whereas a fluted core lifter provides better recovery in fractured ground.
Core lifter case
The core lifter case is essential when it is time to break the core sample. Its tapered interior prevents the core lifter from moving and allows it to keep its grip on the core sample.