Thank you.
Hmmm, definitely a chamfer there, not as pronounced as the set I have though.
I can certainly see how as a chamfer gets larger it reduces the diameter of the face, but if the geometry is such that it doesn't contact the lobe anyway, or contacts it with very little pressure ... I don't know, can't see much harm in it. Seems like the sharp corner of a lifter wouldn't last very long against a lobe with any real pressure on it.
However .. I'm by no means an expert on the subject, there may be other forces at work I'm not aware of.
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