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SYMBOL DESCRIPTIONS
Tool material Coating
UWC Ultra micro grain carbide MIRACLE Coating
Ultra micro grain carbide is used as the VP The original MIRACLE (Al,Ti)N coating.
Also suitable for dry cutting.
substrate material.
HG HSS High grade high alloy HSS UP UP Coating
High grade high alloy HSS is used as the
substrate material.
CO HSS Cobalt high speed steel V VIOLET Coating
Cobalt high speed steel is used as the
substrate material.
HSS High speed steel
High speed steel is used as the substrate material.
Tolerances DRILLING SYMBOL DESCRIPTIONS
Diameter tolerance
Indicates the diameter tolerance of the drill.
Web thinning
X web thinning
Thinning X web thinning is used at the drill point.
XR web thinning Angle and sharp corner edge SYMBOLS
Thinning XR web thinning is used at the drill point. 150° Point angle
Recommendations Indicates the drill point angle at the tip.
ISO Workpiece Classifications
1st recommendation 2nd recommendation
P MK S N H
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