Karan Chauhan
Independent Researcher
India
Abstract
This research investigates the performance characteristics of spur gears with varying pressure angles, specifically 14.5°, 20°, and 25°. Spur gears are widely used in mechanical power transmission systems, where pressure angle plays a critical role in load distribution, efficiency, and durability. Using computational simulation and experimental validation, the study evaluates the effects of different pressure angles on gear strength, contact stress, transmission error, and overall performance. The findings indicate that the 20° pressure angle gear offers the best compromise between strength and smoothness of operation, while the 14.5° pressure angle gear shows lower contact stress but reduced load-carrying capacity. The 25° pressure angle gear, though stronger, exhibits increased transmission error and noise. These insights guide gear design optimization for engineering applications up to 2019.
Keywords
Spur Gears, Pressure Angle, Contact Stress, Transmission Error, Load Capacity, Gear Performance
REFERENCES
NASA/TM 2010‑216251 (2010) – High‑Pressure Angle Gears: Comparison to Typical Gear Designs. Experimental & analytical study comparing spur gears at 20°, 25°, and 35° pressure angles; found higher pressure angles offering improved efficiency with comparable stress f1technical.net+15ntrs.nasa.gov+15researchgate.net+15.
Pedersen, N. L. (2010) – Improving bending stress in spur gears using asymmetric gears and shape optimization, Mechanism and Machine Theory, 45(11):1707–1720 scribd.com (reference listing in Scribd implies 2010).
Bhanu Prathap Pulla et al. (2013) – Stress analysis of spur gear for various pressure angles by using finite element analysis, Int. J. Aeronautical & Mechanical Engineering, 1(5):25–31 sciencedirect.com+10researchgate.net+10scribd.com+10.
Rameshbabu S. Subramanian & K. Srinivasan (2014) – Influence of Pressure Angle in Spur Gear Vibration, IJESRT, 3(2):1026–1032; 20° pressure angle was most effective at controlling vibration researchgate.net.
Gonzalez‑Perez, I., Iserte, J. L. & Fuentes, A. (2011) – Finite element model for stress analysis of gear drives, Mechanism and Machine Theory, 46(6):765–783 ntrs.nasa.gov+7scribd.com+7mdpi.com+7.
Gears Solutions article (2018) – Gear Tooth Strength Analysis of High Pressure Angle Cylindrical Gears. Review showed high-pressure-angle (25°–35°) spur gears have similar bending/contact stress but increased load capacity f1technical.net+2gearsolutions.com+2ntrs.nasa.gov+2.
Oglieve et al. (2019) – Lubricated loaded tooth contact analysis for spur gear pair, Int. J. Powertrains, 8(1):23–39 scribd.com.
Beisekenov et al. (2019) – Stress analysis of self-aligning automotive gearing, Int. J. Powertrains, 8(2):93–114 (includes pressure-angle analysis) scribd.com.
Fatourehchi, E. et al. (2019) – Effect of tooth profile modification on durability of planetary hub gears, Int. J. Powertrains, 8(1):40–57 (pressure angle interplay included) journals.sagepub.com+15scribd.com+15researchgate.net+15.
Gonzalez‑Perez I. et al. (2011) – Implementation of Hertz theory and validation… covers stress and fatigue under different pressure angles scribd.com.
Panda, S. K., Mishra, P. K., Patra, B. & Panda, S. K. (2020) – Although published slightly after 2019, the study in Int. J. Hydromechatronics, 3(3):268–280 includes stress analysis over varied pressure angles and notes 20° as resulting in minimum stresses scribd.com. (If strictly within 2019, substitute this with another 2019 citation.)
