coating gun drill
Coated tool has characteristics as high surface hardness,good abrasion performance, stable chemical properties,small friction factor and lower thermal conductivity,etc.The cutting performance is 30% higher than non-coated tool.Promote grade 0.5-1 of processing accurancy. Prolong the gun drill's service life and lower 20%-50%of tool's consumption cost.The normal coating contains TiN,TiAn titanium based coating and AICrN chromium based coating,etc.
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