This report is a product of Bachelor Degree Project at Mechanical Engineering department inLinnaeus University, Växjö, Sweden. The project is about a design improvement of industrialcompact mixers.This project is accomplished with Xylem, one of the main suppliers of compact mixers in theindustry, located at Emmaboda, Sweden. The company has a problem with the existing designof the two part, oil housing and entrance cover, in 4610/20 compact mixers. The 4610/20compact mixers has suffered from quality problems which affect the production and the endcustomer because of the existing design of these part. The aim of this study is to improve thequality of the product by redesigning of oil housing and entrance cover. In addition to theredesigning of these parts, another important purpose of the project is to produce these partsfrom different material than existing one.The computer aided design programs are widely used, Solid Works, during the project. Forselection of a new material a wide literature research has been accomplished.