kaevamiskäsi

Kaevamiskäsi is an Estonian term that translates roughly to "digging arm" and is used to refer to the arm of an excavator or other hydraulic digging device. In English-language contexts the component is typically called an excavator arm, which comprises the boom, stick (dipper), and bucket. The word splits into kaevama (to dig) and käsi (hand), reflecting its function.

Structure and function

A kaevamiskäsi consists of three main parts: the base or boom attached to the upper structure, the stick or dipper extending from the boom, and the bucket at the end. These parts are connected by joints and operated by hydraulic cylinders fed by a hydraulic system. Movement is controlled by the operator through joysticks and pedals, enabling digging, lifting, trenching, and material handling. The reach and depth depend on the machine’s size and configuration.

Variants and attachments

Different configurations include long-reach arms for extended digging, or compact arms for working in confined spaces. Attachments such as different bucket types, hydraulic breakers, grapples, or thumbs can be fitted to expand functionality. Materials are typically high-strength steel with replaceable wear parts like bucket teeth.

Usage and safety

Kaevamiskäsi is used in construction, mining, and civil works for earthmoving tasks. Safe operation requires proper training, adherence to equipment and workplace safety regulations, and awareness of underground utilities, slope stability, and nearby personnel.

Context

In Estonian-language materials, kaevamiskäsi is usually a descriptive label for the excavator’s digging arm rather than a separate technology category. The term may appear in manuals, catalogs, or industry discussions of excavation equipment.