2. A spur gear made of bronze drives a mid steel pinion with angular velocity ratio of 3, : 1. The pressure angle is 142. It transmits 5 kW at 1800 r.p.m. of pinion. Considering only strength, design the smallest diameter gears and find also necessary face width. The number of teeth should not be less than 15 teeth on either gear. The elastic strength of bronze may be taken as 84 MPa and of steel as 105 MPa. Lewis factor for 142 pressure angle may be taken as 0.684 0.124 - y = No. of teeth

Elements Of Electromagnetics
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2. A spur gear made of bronze drives a mid steel pinion with angular velocity ratio of 3, : 1. The
pressure angle is 142. It transmits 5 kW at 1800 r.p.m. of pinion. Considering only strength, design
the smallest diameter gears and find also necessary face width. The number of teeth should not be less
than 15 teeth on either gear. The elastic strength of bronze may be taken as 84 MPa and of steel as 105
MPa. Lewis factor for 142 pressure angle may be taken as
0.684
0.124 -
y =
No. of teeth
Transcribed Image Text:2. A spur gear made of bronze drives a mid steel pinion with angular velocity ratio of 3, : 1. The pressure angle is 142. It transmits 5 kW at 1800 r.p.m. of pinion. Considering only strength, design the smallest diameter gears and find also necessary face width. The number of teeth should not be less than 15 teeth on either gear. The elastic strength of bronze may be taken as 84 MPa and of steel as 105 MPa. Lewis factor for 142 pressure angle may be taken as 0.684 0.124 - y = No. of teeth
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