Composite materials are widely used in a number of different industries such as shipbuilding, automotive, aviation, etc. One of the main reasons for their wide application range is possibility of customizing their mechanical properties. Polymer Composites with various types of reinforcements are most commonly used types of composites. Production technology for manufacturing parts of polymer composites enables the production of parts in net shape or a near net shape form which reduces or even eliminates the need for machining. However, drilling is still commonly used for machining polymer composites, mostly for making holes that typically serve for assembly purposes. The biggest problem related to drilling is delamination. High delamination amount can significantly impair material properties around processing zone and its progression along the matrix may compromise the structural integrity. Recent research reports show that the greatest impact on delamination in processing zone have the cutting parameters (cutting speed and feed rate), tool geometry and the tool wear. In this work the influence of processing parameters and the tool wear on the delamination is examined. The experiment was conducted by drilling a composite material using standard twist drill in a way that a several combinations of cutting parameters have been repeated several times for different degrees of tool wear. During the experiment, cutting force and motor drive currents were recorded to be processed by filtering and extracting a number of features potentially sensitive to the changes in tool wear. Delamination for each hole was analyzed in order to be correlated to the cutting parameters and the wear of the tool.