PROBLEM A shaft rotating at constant speed is subjected to variable load. The bearings supporting the shaft are subjected to a stationary equivalent radial load of 3kN for 10% of the time, 2kN for 20% of the time, 1kN for 30% of the time, and no load for the remaining time of the cycle. If … Read more
PROBLEM Select a single row deep groove ball bearing with the operating cycle listed below, which will have a life of 15000 hours. Fraction of cycle Type of load Radial (N) Thrust (N) Speed (RPM) Service factor 1/10 Heavy shocks 2000 1200 400 3 1/10 Light shocks 1500 1000 500 1.5 1/5 Moderate shocks 1000 … Read more
PROBLEM For the gearbox shown, we know the number of teeth for the following gears: Z1 = 20, Z2 = 34, and Z3 = 18. Shafts 0, B, and Z are coaxial. The gear sets have modules m12 = 4 mm and m34 = 3 mm. a) Determine the number of teeth for gear 4 … Read more
