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DU may not be so expensive as it is effectively a waste product from the current nuclear industry. It is used for shielding isotope X Ray cameras and also as ballast weights in some aircraft.
Hi Jim. Sorry for the dumb question. I read through the entire post a few times & still at a loss to visualize your method to finish the chromed liner. You mentioned a few points that caught my eye & attached (what I think) to be a fixture related to the operation. But how exactly is it used? 'Grinding' (to me) conjures an image of a powered rotating abrasive tool brought against the part. Is there a motorized aspect to this? What does the business end of the grinding tool look like? How do you preserve the pre-chromed taper angle during finishing? Thanks in advance! -Peter(reply 3) - No lapping compounds of any kind, including non-embedding types, should ever be used to fit a piston in ABC or AAC engines- Cylinders are machined with their taper amount & then chrome plated with approximately .0015" thick chrome/ side- The cylinders are then ID ground(reply 35)- Cylinders in nitro engines such as the Nelson are honed on a Sunnen honing machine to give a fine finish in a short amount of time. - Cylinders in my .90 cu in engine are ground & will have an even better finish than honing