I have a 2007 cummins 528. I tore it down to inspect and correct the multitude of problems that cummins builds in them. This being my first Hemi, I have a few questions. The rod bearings had a chamfer a full 1/8" inward. I understand that some chamfer is necessary, I assume so that the edge won't Butt against the radiused edge of the journal, but it seems that the Eagle rods prevent that from happening as they are slightly wider than the bearing? I chamfered the bearing using and old rod for the fixture and a cone shaped abrasive tool in the drill press, after trial and error, my chamfer is only about 1/16" and when I place the bearing shell on the journal, it lays flat even when you move it as far to the journal radius edge to butt against the area above the actual radius. I hope this makes sense! I am just trying to make sure I have it right, Cummins, I believe, overdid it and it was sloppy work to boot! Any advice by Hemi engine builders appreciated !!!

The only thing that doesn't make sense to me is what does Cummins have to do with your Hemi rod bearing questions?
Eagle cranks require narrow bearings and sometimes a custom fit with a bearing knife.
Gus

Are you not aware that Cummins built the Hemi crate engines until recently, or is there something else that does not make sense?

( cone shaped abrasive tool )

I never said that it had an Eagle crank, It came with what Mopar uses. I said they are Eagle rods, But I could be wrong, they are identical to a set that I already had, but I might have been making an assumption. The Clevite bearings were not pre-chamfered, did not know they were available, I had my machine shop order them. The FM's that came in them were done after the fact, you could tell by looking, and not done well at that. As far as the abrasive cone used for the chamfering, it was loaned to me by the owner of a machine shop I use that builds lots of brand x circle track and drag engines. Approx 5" in diameter and uses replaceable cone shaped abrasive paper in various grits. Works like a charm. I think I should have posted on the race forum as I am answering irelevant questions and getting no answers.

Crank, rods, it's all chinese sourced, I got confused once you thru in having to HACK bearings to clear the crank which is not a problem with the crank in your engine and Gus saying it was an EAGLE CRANK .

To answer Gus' question as what has Cummins has to do with it , Cummins RECON was the LOW BIDDER on crate motors and some dumbbleep at MP went with them.

As far as the radius clearance, the crank radius is generally 1/8" so you should radius the bearing the same . If you have only done 1 I would tell the guy that ordered you the WRONG bearings to order the correct set plus one to replace the one you modified and return the WRONG set , eat the cost of the one bearing as your learning curve .

Where the ones you removed from the engine bad ?

Cummins had alot of problems with assembling those motors, some there fault some supplier fault.

Sometimes the locating tangs in aftermarket rods are all over the place, sometimes the rod width's vary, sometimes the radius on the crank is crap.

I'm thinking Cummins just came up with a set chamfer for all these parameters and hacked away.

Low bidder= we don't have time to custom fit each motor.

No doubt you can do a better job at home, I would want the chamfer as small as possible BUT it's not a big deal.

I would be more suprised that a "professional" engine shop didn't realize that they could have provided you with a set of chamfered bearings out of the box??

Maybe they figured you may have to modify them anyway?

Good thing you checked it and at the end of the day you learned something new