Poly-ether-ether-ketone (PEEK) is a semicrystalline high-performance thermoplastic with good mechanical and tribology properties, making it more suitable for bearing applications as it is lighter in weight compared to metallic materials. In the first seminar, the abrasive wear behaviour of the 3D-printed PEEK samples with different surface designs was discussed. In addition to the abrasive conditions, the bearings normally operate under adhesive contact conditions with or without lubrication, depending upon the application. The research work is focused on understanding the effects of the additive manufacturing process that will result in different surface morphologies on the adhesive wear conditions. The surface properties of the additively manufactured PEEK sample differ from the extruded samples, and hence, their response toward friction and wear also varies under different conditions. The additively manufactured PEEK sample's contacting surface, hardness, and surface roughness play an important role. The orientation of the surface infill and infill percentage influence the tribo characteristics. In the case of lubricated contacts, the surface design to accommodate lubricant will also play a role and is reported. Machine Learning models are employed to assess the wear loss in 3D printed samples.