MACHINING THE CAM
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I made the cam and cam gear one piece to eliminate attaching the cam to the gear with screws. This photo shows the blank for the cam and gear being parted off in the lathe. 12L14 steel was used for the cam and gear. |
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Reamed holes D, E, and F, in the cam fixture, locate the cam blank relative to the lathe spindle centerline at the proper radius for the corresponging cam face The hole just beyond each pivot hole is for the drill blank guage pin. The counterbored holes are for the fixture hold down bolt. A small dowel pin keeps the cam blank from rotating during machining. |
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This picture shows the workholding bar with centerpin attached to the faceplate. The cam & gear blank is attached to the cam fixture plate. |
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The cam fixture is setup to spin about hole D so the first cam face can be machined. Note the socket head capscrew to the right of the cam. The SHCS fastens the fixture to the bar mounted to the faceplate. |
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The cam fixture is now mounted to pivot around hole F so the next cam face can be machined. |
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The drill blank, inserted while measuring, is a reference point for checking the radius being machined on the cam. |
Created: December 30, 2003
Updated: January 26, 2004