HSS-E Cobalt Machine Reamer with Cylindrical Shank

This machine reamer combines a cylindrical shank (d2, h9) with a cobalt high-speed steel (HSS-E) cutting body for machine reaming of pre-drilled holes. It is manufactured to DIN and TSE standards, with a controlled outside-diameter tolerance plus a defined helix angle and cutting direction. Seven sizes span d1 2 mm to 5 mm with matching shank diameters, overall lengths and flute lengths. The cobalt-alloyed HSS-E substrate provides higher hot hardness and wear resistance than standard HSS, so the reamer holds size and finish over longer production runs.