Metal drill R9 TulaMash 4.0mm
Metal drills made of high-speed steel R9 according to DIN 338 are designed for drilling holes in especially strong high-alloy metals with a density up to 1000N/mm, as well as stainless, refractory and acid-resistant steels . By adding cobalt and other alloying elements to the composition, the red hardness of the drill is significantly increased.
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