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For stainless steel, where chips tend to stretch and cutting heat tends to accumulate, managing the maximum diameter at actual size within the standard will prevent durability UP problems. Although there are varying degrees, stainless steel tends to shrink when Pilot hole is drilled with a carbide drill. In high-speed drills for stainless steel, which have a sharp edge, there is a tendency to expand. You need to consider the tendency of the drill you are using and choose the drill diameter for the Pilot hole diameter you are targeting.

(FAQID:347)