Vol. 9, Special Issue 12, Part R (2025)

The extraction of linseed fiber using traditional manual methods is labor-intensive, time-consuming, and inefficient, limiting the effective utilization of linseed straw as a valuable agricultural resource. The present study focused on the design, development, and performance evaluation of a power-operated linseed fiber extraction machine (POLFEM) intended for small-scale and rural applications. Five linseed (Linum usitatissimum L.) varieties were used to assess machine performance under varying operating conditions. The developed prototype incorporated a four-roller system consisting of smooth feeding rollers for initial crushing and rasp-bar rollers for stem separation. Performance evaluation was carried out at different roller speeds (30, 40, and 50 rpm), feed rates (25, 30, and 35 kg h⁻¹), moisture content levels, and roller clearances. The results indicated that a roller speed of 40 rpm, feed rate of 30 kg h⁻¹, moisture content of 7-9%, and roller clearance of 30 mm were optimal for efficient operation. Under these conditions, the POLFEM achieved a maximum extraction efficiency of 98.51% with minimal fiber damage (1.3%). The economic analysis demonstrated the feasibility of the machine, with a fabrication cost of ₹75,000, total operating cost of ₹74.78 h⁻¹, and a payback period of 5.09 years. The machine significantly reduced human energy input, with mechanical and electrical energy contributing approximately 97% of the total energy requirement. Overall, the POLFEM provides an efficient and economically viable alternative to manual linseed fiber extraction methods and holds considerable potential for promoting mechanized processing and value addition of linseed straw in rural and small-scale industrial settings.