The chef knives that I HT the other day had their turn at the grinder to get the bevels ground in and there was such a dramatic reduction in weight between the one I had done and the one still to be ground that I decided to put them on the scales to see what weight reduction there was with the grinding. The unground one was 245gram and after grinding the weight was just 155 gram so there was 90 grams left in the bucket under the grinder or almost a 1/3 of its weight.