I have a metal disk with pins in it (~118mils diameter) that is part of a grinder machine. I believe the disk and pins are both hardened steel since it is used for grinding plastic flakes into powder but I have no idea what kind. I heated the disk to ~1100F for ~2hrs to burn off some resin that got stuck to it that I was grinding. After heating the plate all the pins are all loose. I did not realize that the pins were press fitted into the disk.

My question is, can I reverse the process by reheating. Should I heat the metal plate without the pins in it. Will quenching the plate cause the holes to shrink further ? Any thoughts or ideas would be greatly appreciated

Thanks

Andy