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Cutters with 2-1/2" diameter is with 1-1/4" Weldon shanks, dia. of hole of pilot pin: 5/16
HSS-Co annular cutters are made of Molybdenum Chromium-Vanadium-Tungsten alloy high-speed steel with an additional 5% cobalt (M35) for inch sizes. The HSS-Co annular cutter is specifically designed to remain cool when cutting holes.
All flutes are fully ground, resulting in super fast feed speed and finishing holes on hard materials, improving the chip break and cutting performance.
The M35 HSS-Co annular cutter is widely used in the metalworking industry for its superior red hardness comparing with conventional high-speed steel. It leads to a shorter cycle time in productions due to its higher cutting speed