Step:13

   
 
CRANKSHAFT_v1.mb
connecting_rod1.mb

Step:14

You can find this option at the bottom rite corner. Set our end time to 100 frames.
 

Step:15

Select the shaft. Go to the channel box .

 > rite click > select “lock Selected” from pop up menu

Step:16
Select the shaft .go to chanalbox. then 

Step:17

In menu bar of Graph Editor go to View>Frame all
Then select the end point of the curve and drag it up to any limit according to your satisfaction. Spend some time in r&d to get a better result.

Now let us play. .

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