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A 3-module, 20° hob is used to cut a spur gear. The hob is right-handed with a lead angle of 2°40', a length of 75 mm, and an outside diameter of 75 mm Make a full-size sketch of the hub cutting a 48-tooth spur gear. The gear blank is 38 mm wide. Show the pitch cylinder of the hob on top of the gear blank with the pitch helix of the hob in correct relation to the pitch element of the gear tooth. Show three tooth elements on the gear and 1 turns of the thread on the hob; position these elements by means of the normal circular pitch. Label the axis of the hob and gear blank, the lead angle of hob, and the direction of rotation of the hob and gear blank.
The rational and optimal selection of materials underpins all engineering endeavours. In individual tutorials and class exams, you will practice various aspects of the materials selection process as follows: defining a component function statement..
A reaction 2A--->B is second order with respect to A. Batch experiments have shown that, for an initial solution containing Ca=3mg/L, the concentration of A in a system can be reduced by 99% is 25 min.
A piston-cylinder assembly contains 2 lbm of water, initially at 100 lbf/in.2 and 400o F. The water undergoes two processes in series: a constant pressure process followed by a constant volume process. At the end of the constant volume process, the t..
a propeller driveshaft is to transmit 2500 hp at 75 rpm. it is to be made of aisi 1040 wqt 1300 steel. use a design
calculate the work done and the final temperature for the following processespolytropic n 1.0 1.0 kg of air t1 1470
assuming a transition reynolds number of 5 x 105 determine the distance from the leading edge of a flat plate at which
in boulder dam 2000 cubic feet per second of water flows through each of the pipes called penstocks that lead down to
air at 35degc 105 kpa flows in a 100 mm times 150 mm rectangular duct in a heating system. the volumetric flow rate is
a piston-cylinder device contains r-134a. initially the phase is saturated vapor at 160 kpa. the system then undergoes
Explain why it is difficult to validate a reusable component without the component source code. In what ways would a formal component specification simplify the problems of validation?
1. Cite the relative Burgers vector-dislocation line orientations for edge, screw, and mixed dislocations. 2. For an FCC single crystal, would you expect the surface energy for a (100) plane to be greater or less than that for a (111) plane? Why? (..
Crank AB of the linkage shown rotates clockwise at 300 rpm. Using graphical method, determine the velocity of point B, C, D, and E.
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