MIME 3300 Homework 9 11/20/2000

							MIME 3300                           Homework 10             4/8/2010
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Due 4/20/2010

Write your final answers below and submit this page with the rest of your
solution:


   1.

   2.

   3.

   4.

   5.

        a. (T-F)
        b. (T-F)
        c. (T-F)
        d. (T-F)
        e. (T-F)
        f. (T-F)
        g. (T-F)
        h. (T-F)
        i. (T-F)
        j. (T-F)
   1. Find the diametral pith of a pair of gears whose center distance is
      0.3625 in. The gears have 32 and 84 teeth respectively.
   2. Determine the module of a pair of gears whose center distance is 58
      mm. The gears have 18 and 40 teeth respectively.
   3. What are the diametral pitch and the pitch diameter of a 40-tooth
      gear whose circular pitch is 3.5 in?
   4. A 4-diametral-pitch, 24 -tooth pinion is to drive a 36-tooth gear. The
      gears are cut on the 200-full depth involute system. Find and
      tabulate the addendum, dedendum, clearance, circular pitch, tooth
      thickness, pitch diameters, gear ratio, base circle diameters and the
      paths of approach and recess.

   5. Answer the following questions:

a) The fundamental law of gearing states that the ratio of the number of
   teeth of the pinion and the gear is equal to the ratio of their diameters.
   (T-F)
b) The larger that diametral pitch of a gear the thicker its teeth are. (T-F)
c) The larger the module of a gear the thicker its teeth are. (T-F)
d) The line of action always passes through the pitch point. (T-F)
e) The addendum of a gear is typically smaller than its dedendum. (T-F)
f) The base diameter of a gear is larger than its pitch diameter. (T-F)
g) The velocity ratio is equal to the ratio of the distances of the centers of
   the pinion and the gear, respectively from the line of action. (T-F)
h) The line of action is tangent to the pitch circles of the gear and the
   pinion. (T-F)
i) The portion of the profiles of the teeth of the pinion and the mating gear
   above the corresponding base circles are identical if the standards of the
   American Gear Manufacturer's Association (AGMA) are followed. (T-F)
j) Look at a sketch showing the teeth of a pinion and gear. The pinion is
   driving the gear. The point where the first contact between the pinion
   and the gear teeth occurs is the intersection of the addendum circle of
   the gear with the line of action. (T-F)