5.2 Two equal gear wheels of 360 mm pitch circle diameter and 6 module are in mesh. The teeth are of involute form, with

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5 2 Two Equal Gear Wheels Of 360 Mm Pitch Circle Diameter And 6 Module Are In Mesh The Teeth Are Of Involute Form With 1 (68.06 KiB) Viewed 22 times

5.2 Two equal gear wheels of 360 mm pitch circle diameter and 6 module are in mesh. The teeth are of involute form, with a pressure angle of 20°. 5.2.1 Calculate the maximum addendum required if there are always to be at least two pairs of teeth in contact. (6.8 mm) 5.2.2 If the gear wheels rotate at 120 r/min and 7 kW is being transmitted, calculate the normal force between the teeth, assuming that the total force is divided equally between the two pairs of teeth. (1.647 kN) 5.2.3 Calculate the maximum sliding velocity between the teeth when the gear wheels rotate at 120 r/min. (0.445 m/s) 5.3 Two gear wheels of diameters 75 mm and 250 mm have involute teeth of 5 mm module. The pressure angle is 20°. The addendum is the same for each wheel and as large as possible while avoiding interference. 5.3.1 Calculate the length of the addendum. (1.947 mm) 5.3.2 Calculate the contact ratio. (1.6) 5.3.3 Calculate the sliding velocity at the first point of contact when the smaller wheel is driving at 2000 r/min. (3.49 m/s) 5.3.4 Calculate the maximum and minimum normal force between the pairs of teeth, when the force is shared uniformly between those pairs in contact, and the smaller wheel is transmitting 8 kW at 2000 r/min. (1.084 kN ; 542 N) 5.4 A wheel and pinion with involute teeth and a module of 5 mesh with one another. The addendum of the teeth is one module. The pressure angle is 20° and the gear ratio 2 to 1. 5.4.1 Calculate the number of teeth in each gear so that interference is just avoided. (15; 30) 5.4.2 Calculate the contact ratio. (1.567) 61