Bevel_Gears.xls

Production gears must be designed using AGMA standardsBy Alex Jacobs 1/24/02, modified 2/20/2003 by Alex Slocum

Be consistant with units! (in, lb or N, m or N, mm)InputsNumber of Teeth, subject gear, N 24Number of Teeth, mating gear, Nm 48Pitch diameter of subject gear, D (inches) 1Face Width, subject gear, F (inches) 0.25Torque, subject gear, T (in-lbs) 42AGMA Geometry Factor (from chart), J 0.25Stress OutputsAGMA Bending Stress (psi) 32256Shear of the tooth (F/A) (psi) 5780Tooth Bending Stress (psi) 41269Tooth Bending Stress/AGMA Stress 1.2794Geometry OutputsPitch, P 24Pitch Angle (Subject), G 0.464Pitch Angle (Mating), gam 1.107Gear Ratio 0.500Cone Distance, Ao 1.118Tangential Force at large end of tooth, Wto 84.00Tangential Force at Middle of Face 94.57Tooth Thickness, Large End, tt 0.065Diameter@Small end of tooth 0.776Tooth Thickness, Small End, tts 0.051Circular Pitch, p 0.131Chordal area, Ac 0.015Moment of Intertia, I 4.16E-06Distance Nuetral axis to outer fiber, cc 0.033Back Cone Radius, Rb 0.559Tredgold "Spur Gear" Tooth Shape ApproximationNumber of Teeth on imaginary gear, N' 26.833Pitch Diameter of imaginary gear, D' 1.1180Diametrical Pitch of imaginary gear, P' 24.000Addendum, a (inches) 0.0417Dedendum, b (inches) 0.0521Clearance, cr (inches) 0.0103Tooth Height (inches) (Not used) 0.0938

Spreadsheet to estimate bevel gear tooth strength

Enter numbers in BOLD, results in RED

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