The camshaft 3, wherein the bore includes a third radial inner surface area at the connecting portion that is frictionally engaged with {HEAD ~ the outer surface} of {TAIL ~ the first shaft} 
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The camshaft 3 , wherein the bore includes a third radial inner surface area at the connecting portion that is frictionally engaged with { HEAD ~ the outer surface } of { TAIL ~ the first shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL