The P-18K BK (BAU-846) is a Polish-made spindle hydraulic pump. It is used in the MASZCZYK mobile drilling rig and other drilling equipment. Its main purpose is to provide hydraulic power. Its special features make it ideal for drilling operations that require high precision, while providing stable and continuous output. It has an electric motor, a piston-type pump, two outputs, a low-pressure/high-pressure switch, and an adjustable bypass valve. It offers several advantages, such as a low noise level, a low operating temperature, a long service life, a low maintenance requirement, and a high reliability.