90° HSSco Spotting Drill Spot TiN Coated
$1.33
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Name: Centering drillMaterial: HSS-CO with diamondsHardness: HRC62-64 degreesPurpose: Punch fixed-point holes, orifice chamfering, point holes and chamfering are completed at once.Before drilling, use a centering drill to drill an initial hole with a depth of 1-2 times the diameter to ensure ordinary drilling.The accuracy of the hole processing of the head does not reserve chamfering for tapping, which is convenient for tapping.Processable: stainless steel below HRC38 degrees, mold steel, spring steel, 45 steel, A3 steel, cast iron parts, copper and aluminum, etc.
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