Abstract

The filament extruder machine is used to produce 3D printing filament made from Thermoplastic Polyurethane (TPU). This final project focuses on the design and analysis of the bearing system on a single screw-type extruder machine. The processing of TPU, which requires high temperatures and stable rotation, makes the bearing's role crucial in supporting machine performance. The machine is powered by a 25watt electric motor operating at 1390 rpm, which is reduced to 12 rpm through a 1:75 gearbox. The bearing used is a KFL000 type with a 10 mm bore. Calculation results show an equivalent dynamic load of 128,34 N and a dynamic load capacity of 283,68 N. The bearing's service life is estimated to reach 4 years, 5 months, and 19 days with a reliability level of 95%. Testing showed that the machine operates properly and is capable of producing Ø1.75 mm TPU filament according to specifications.

Keywords: Extruder Machine; Bearing; Smart Material Filamen; 3D Printing

References

1. Yair I, Cohen E and Oron G. “Converting Plastic Nuisance into a Valuable Resource: Reuse of Residual Plastic Bottles for Manufacturing (3D) Home Printers Under Economic and Improved Environmental Considerations”. Research Square (2022).
2. Gastaldi M., et al. “Functional Dyes in Polymeric 3D Printing: Applications and Perspectives”. ACS Materials Letters 3.1 (2021): 1-17.
3. Jiang S., et al. “Tribological evaluation of thermoplastic polyurethane-based bearing materials under water lubrication: Effect of load, sliding speed, and temperature”. Friction 12.8 (2024): 1801-1815.
4. Ghaisani AE., et al. “The Effect of Styrene-Butadiene Rubber Waste Particle Size on the Mechanical and Thermal Behaviour of Polypropylene as a 3D Printing Material”. Journal of Applied Science and Engineering 29.6 (2025): 1533-1540.
5. Kharanzhevskiy EV., et al. “Towards eliminating friction and wear in plain bearings operating without lubrication”. Scientific Reports 13.1 (2023): 17362.
6. Kumar A, Kovacevic A and Chaudhari A. “Enhancing Efficiency in Screw Compressors Through Sustainable Polyglycol-Based Lubricants”. MAPAN 40.3 (2025): 809-821.
7. Elleuch R., et al. “Tribological behavior of thermoplastic polyurethane elastomers”. Materials & Design 28.3 (2007): 824-830.
8. Moldovan C and Sticlaru C. “Performance Analysis of Polymer Additive Manufactured Gear Bearings”. Applied Sciences 13.22 (2023): 12383.
9. Rahman P, Tan M and Katiman A. “Design of an Extrudate Filament Machine for Recycling Waste Polyethylene Terephthalate Plastics into 3D Printing Filament”. J-Innovation 13 (2024): 25-32.
10. Eboh F, Osideko O and Onitiri M. “Fabrication of Extrudate Filaments from Waste Polyethylene Terephthalate Plastics for 3D Printers”. FUOYE Journal of Engineering and Technology 6 (2021).
11. Rashwan O., et al. “Extrusion and characterization of recycled polyethylene terephthalate (rPET) filaments compounded with chain extender and impact modifiers for material-extrusion additive manufacturing”. Scientific Reports 13.1 (2023): 16041.
12. Soler V, Retsin G and Garcia M. A Generalized Approach to Non-Layered Fused Filament Fabrication (2017): 562-571.
13. Xiao J and Gao Y. “The manufacture of 3D printing of medical grade TPU”. Progress in Additive Manufacturing 2.3 (2017): 117-123.
14. Nithya Priya S., et al. “Design and fabrication of filament extruder with spooler”. Materials Today: Proceedings 81 (2023): 221-223.

Citation

Averio Anandiv., et al. “Designing a Bearing System for a Smart Material Filament 3D Printing Extruder Machine". Clareus Scientific Science and Engineering 3.2 (2026): 04-11.

Copyright

© 2026 Averio Anandiv., et al. Licensee Clareus Scientific Publications. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.