The machine shown in the figure can be used for a tension test but not for a compression test. Why? Can both screws have the same hand? Bearings Motor Spur gears Bronze bushings Fout C.I. Worm 21's 2L 's Collar bearing

The machine shown in the figure can be used for a tension test but not for a compression test. Why? Can both screws have the same hand? Bearings Motor Spur gears Bronze bushings Fout C.I. Worm 21's 2L 's Collar bearing

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A 1" diameter line shaft, which is supported by frictionless pulleys at the ends, carries 2 pulleys. The 10" diameter driver pulley is driven in a counter-clockwise direction, and its belt tensions are 25 lbs and 56 lbs. The 2" diameter driven pulley has one of its belt tensions measured at 30 lbs. Calculate the missing belt tension.
The roughly position of the automobile jack shown in the figure is a square screw with a single blade at both ends. ABC is controlled by a bolt (right-hand threaded in A, left-handed in C). square of the bolt screw has a pitch of 2.5 mm and an average diameter of 9 mm. between the bolt and the jack limbs The coefficient of static friction is 0.15, taking into account the position and load shown, you can use the jack Find the magnitude of the torque that must be applied to raise it.
Two shafts 30 in. apart, each carrying a four-step pulley, are to be connected by a cross belt. The driving shaft is to turn 180 rpm while the driven shaft is to turn 50, 150, 250, and 600 rpm. The smallest step of the driver is 10 in. in diameter. Find (a) the diameters of all the steps, (b) angle of contact for each pair of pulleys, and (c) belt length.
Two cqual involute gear wheels of 40 teeth each, 3 mm module and 20° pressures angleare in mesh. Determine the minimum addendum if 2 pairs of teeth are always in mesh.The gear wheels rotate at 750 r.p.m. and transmit 4.6 kW. Find the normal force at eachpair assuming equal direction of load between the pairs. Neglect friction.
A steel shaft 800 mm long transmitting 15 kW at 400 r.p.m. is supported at two bearings at the twoends. A gear wheel having 80 teeth and 500 mm pitch circle diameter is mounted at 200 mm from theleft hand side bearing and receives power from a pinion meshing with it. The axis of pinion and gearlie in the horizontal plane. A pulley of 300 mm diameter is mounted at 200 mm from right hand sidebearing and is used for transmitting power by a belt. The belt drive is inclined at 30° to the vertical inthe forward direction. The belt lap angle is 180 degrees. The coefficient of friction between belt andpulley is 0.3. Design and sketch the arrangement of the shaft assuming the values of safe stresses as :τ = 55 MPa; σt= 80 MPa. Take torsion and bending factor 1.5 and 2 respectively.
Two parts of a machine, both made from steel, are held together by 7 equally-spaced M6 x 1.0 grade 8.8 bolts that are uniformly tightened to provide a total initial clamping force of 60 kN. What wrench torque is required to set the preload on these bolts? Assume a torque factor of 0.18 in your calculations. Express your answer in units of newton meters to a resolution of 0.1 N-m.
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The reducer input shaft shown in the figure is tapered It transmits moment with the help of a gear wheel. On the spindle, Fa = 552 N, Fr = 457 N, Ft = 1960 N from gear forces and belt mechanism incoming Fk = 2600 N radial force impact . The shaft rotates with n = 1090 rpm. Accept the shaft diameter in the A bearing as dA = 35 mm. Fixed ball suitable for Lh = 13500 h select bearing.
6. Design a clamp coupling for transmitting 36 kW, at 200 rpm. Allowable shear stress in shaft is 45 MPa, allowable shear stress in key is 40 MPa, and allowable crushing stress in key is 90 MPa. The number of bolts joining the two halves is 4. The permissible tensile stress in bolts is 60 MPa. The coefficient of friction between the muff and shaft can be taken as 0.25
A self-aligning ball bearing used in the car manufacturing industry has a basic dynamic load rating of 26699 N. The desired life of the bearing is 1954 millions of revolutions. Calculate the equivalent dynamic load on the bearing in N. For ball bearing, the value of k is 3.
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Symmetrical shoes will not create moment around the joint The position of the pads with an angle of 90° on the brake where it is placed in the figure is shown in the figure. The brake mechanism is fixed to the ground by the support plate. The disc in the figure rotates clockwise and the friction coefficient of the pads is accepted as 0.491. If a force of 565 N is applied on the arm from the point shown on the figure;a) What is the dimension e shown in the figure so that the shoe does not create a moment around the joint?how much should it be? Calculate.b) Draw free body diagrams of ABC opening lever and both lining levers.c) What is the normal force acting on each pad? How much braking torqueoccurs? calculate