Design and Mechanical Analysis of a #8 Food-Grade Meat Grinder with Gear-Reducer Transmission

Abstract

Abstract– This paper presents the design and mechanical analysis of a #8 food-grade meat grinder intended for small-scale processing applications. The system was developed to reduce clogging, overheating, and low efficiency commonly found in domestic grinders. The proposed design integrates a 1.5 HP electric motor coupled to a worm gear reducer (36:1 ratio) to achieve an output speed of approximately 92–100 rpm and a nominal processing capacity of 1.5 kg/min. Mechanical calculations were performed to estimate axial cutting force, required torque, and power consumption. Shaft sizing was validated using torsion and Von Mises combined stress criteria with a safety factor greater than 2. Stainless steel AISI 304 and 420/440C materials were selected to ensure corrosion resistance, hygiene, and wear durability. Finite element analysis (FEM) was conducted to verify stress distribution in critical components. Experimental operation demonstrated stable grinding, adequate torque transmission, and safe performance within allowable stress limits. Results confirm that the proposed design offers an efficient, hygienic, and low-cost alternative suitable for small food-processing environments and educational or local production settings.