Is there any around providing a certificate of compliance for commercial items used on your final product. Example if you use standard bearing on a manufactured shaft I can see needing a C of C for the shaft but if your print calls out a commercial part number (bearing) is there any around providing a C of C from the bearing supplier?

You can request a C of C from your supplier, or you can check the parts your self and write up a C of C. If your customer requests it you should provide one. C of C just states that the product conforms to requirements.

Is there any around providing a certificate of compliance for commercial items used on your final product. Example if you use standard bearing on a manufactured shaft I can see needing a C of C for the shaft but if your print calls out a commercial part number (bearing) is there any around providing a C of C from the bearing supplier?

If the customer requires a C of C, and can't be convinced otherwise, then you have to supply one. Is there anything in the requirement that states who must originate the cert? If not, then all you probably need to do is supply something that says that the part meets the PO/drawing requirements.

If you are doing CofC's for the DOD, don't forget about "Specialty Metals" as defined by DFARS 252.225-7014.

Doug