Intro to a port job

Bodyperson said

Is that process indexing? I noticed it was grinding mostly one side. I didn't think about how the crankshafts can be "off" in the index department until you mentioned it maybe in another post.

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Indexing the crank means the grinder makes all the stroke lengths the exact same and that looks like what he's doing.

The only way to grind the rod throws is to index crank so it spins the Rod throw on its axis.