1. A 15-tooth spur pinion has a diametrical pitch of 5 and 20° pressure angle, rotates...
9. AGMA Shigley 5th Ed. 14-27 A 17-tooth 20°-pressure angle spur pinion rotates at 1800 rev/min and transmits 4 hp to a 52-tooth gear. The diametral pitch is 10, the face width is 1.25 in, the quality standard is No. 6, and the mounting is with exceptional rigidity. The pinion is steel, hardened to Brinell 240, and the gear is of No. 30 cast iron. Find the factor of safety based on surface fatigue strength if the life is to...
27 Two 20° straight bevel gears have a diametral pitch of 4, and 24 and 48 teeth, respectively The tooth face width is 2 in. The pinion rotates at 1000 rev/min and transmits 50 hp. The shafts are at 90. Determine the components of the gear tooth force and show these on a sketch of the ge 27 Two 20° straight bevel gears have a diametral pitch of 4, and 24 and 48 teeth, respectively The tooth face width is...
6) [20 pts) Bending Stress in a Gear A steel spur pinion has a pitch of 6 teeth/in, 22 full-depth teeth with a cut profile, and a 20° pressure angle. The pinion runs at a speed of 1280 rev/min and transmits 15 hp to a 60-tooth gear. If the face width is 2 in., estimate the bending stress. Take the value of Lewis form factor, Y, from the table 14-2. The bending stress is kpsi.
designs QIII) A 15-tooth, precision-made spur pinion is to drive a 25-tooth gear. A pitch of 6 teeth/in has been selected with a 2.25 in face width. Also, the teeth are to be 25 full depth, with a ddendum of 1.35/ pa for a pinion speed of 1150 rpm, and 10 hp is to transmitted under steady load conditions. The material selected for both gears is a through-hardened steel of a hardness of 302 Bhn . Determined the actors of...
See Figure P12-1. The shaft rotating at 550 rpm carries a spur gear B having 96 teeth with a diametral pitch of 6. The teeth are of the 20%, full-depth, involute form. The gear receives 30 hp from a pinion directly above it. Compute the torque delivered to the shaft and the tangential and radial forces exerted on the shaft by the gear. Figure P12-1 Shaft carrying a gear and a V-belt drive 0 See Figure P12-1. The shaft rotating...
The figure shows a pair of shaft-mounted spur gears having a diametral pitch of 5 teeth/in with an 18-tooth 20° pinion driving a 50-tooth gear. The horsepower input is 31 maximum at 1.600 rev/min. Find the magnitude of the maximum forces acting on bearings A,B, C, and D 3 in 3 in RA RB = lbf lbf lbf lbf RD = The figure shows a pair of shaft-mounted spur gears having a diametral pitch of 5 teeth/in with an 18-tooth...
A helical gear has a normal diametral pitch of 24, a normal pressure angle of 14 ½ o, 72 teeth, a face width of 0.25 in and helix angle of 45° The power comes from an electric motor, and the drive is to winch that will experience moderate shock. (a) If the gear transmits 0.50 HP at a speed of 3450 RPM, what would be the tangential force? (b) If the gear operates with a pinion having 16 teeth, what...
7) [30 pts] Factor of Safety for Contact Stress A steel spur pinion has 16 teeth cut on the 20 full-depth system with a module of 8 mm and a face width of 90 mm. The pinion rotates at 150 rev/min and transmits 3 kW to the mating steel gear. This pinion is to mesh with a steel gear with a gear ratio of 4:1. The Brinell hardness of the teeth is 200, and the tangential load transmitted by the...
The pinion of a straight gear, with an angle of 20 °, 36 teeth and diametral pitch of 10 teeth / in. It is powered by a 24 hp and 1350 rpm engine. Its combination of tangential / radial forces [lbf] is: a)600/200 b)226/622 c)622/226 d)none
See Figure P12-1. The shaft rotating at 550 rpm carries a spur gear B having 96 teeth with a diametral pitch of 6. The teeth are of the 20%, full-depth, involute form. The gear receives 30 hp from a pinion directly above it. Compute the torque delivered to the shaft and the tangential and radial forces exerted on the shaft by the gear. Figure P12-1 Shaft carrying a gear and a V-belt drive C D 10.004-10.00 6.00 V-belt sheave Gear...