Just like grooves and holes in performance braking systems for automobiles and motorcycles...cooling.
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Just like grooves and holes in performance braking systems for automobiles and motorcycles...cooling.
Those grooves mostly allow the stones to be a bit more aggresive as well as providing a means for excess swarf to be scuffed away. That gives a slight advantage when processing the numerous straight razor blanks which pass through the machine every day.
Which factory was this? Where is it?
Thiers-Issard, France :)