SNMG120412 CA5525 (10pcs) CNMG120404-SH NX2525 Why does the STGCR holder

Why does the STGCR holder have a 91-degree lead angle instead of exactly 90 degrees

and titanium

GR (Heavy Roughing - This Model) Built for extreme feeding and large depth of cut

A2: The 16ERM full-profile configuration fully forms both the thread root and crest while integrating a dedicated chipbreaker groove

The tool life is predictable

SNMG120412 CA5525 (10pcs) CNMG120404-SH NX2525 Why does the STGCR holderCVD Coated Carbide: CA5525, Designation: SNMG120412 CA5525 Corner Radius (in) RE: 3 64 ,Carbon Alloy Steel: Light Interruption 2nd Choice,Color: Gold , Coating Main Component: TiCN+Al2O3+TiN,Advantages: Application: For general machining of steel, roughing to interruption