Hi guys we have a continuous through-pass shot peening machine and an issue im facing is blade life , when im running with new blades I can push 30m/s through and get my desired almen values but after two weeks the blades need replacing and I can only get 19m/s to achieve my specs on the worn blades , could anyone give me some advice Im busy doing tests to set up a model for optimal replacement. Im new to shot peening so would really appreciate any advice. Thanks