(4) For a pair of external standard spur gears, Z₁-18, Z₂-37, ha-1, c*-0.25, m=5, a=20°: 1) To calculate diameters for a

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4 For A Pair Of External Standard Spur Gears Z 18 Z 37 Ha 1 C 0 25 M 5 A 20 1 To Calculate Diameters For A 1 (28.79 KiB) Viewed 25 times

(4) For a pair of external standard spur gears, Z₁-18, Z₂-37, ha-1, c*-0.25, m=5, a=20°: 1) To calculate diameters for addendum circle dal,daz, reference circles d₁d₂, dedendum circles dj,dp, basic circles db.db2 and center distance a 2) To calculate the contact ratio & 3) If the working center distance a' increases 3mm in comparison to the center distance a, Determine the working pressure angle a' and the contact ratio & (15 points)