Slant 6 timing chain lubrication?

Just practicing on an old main bearing to get the idea. I don't see how a file would even cut this material. My dremmel bits are very fine and can work down in grit to eventually polish. Is this acceptable? The bearings which were in the car where not champhered at all and had quite a few miles on them. I don't see how oil ever made it to the timing chain. :realcrazy:

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I think I would chamfer it just "a bit" more, but you certainly have the idea! You especially want to "open up" the chamfer to the oil groove in the bearing pretty good.