whereas VP15TF is a more universal PVD grade
protecting the square bar shank from abrasive micro-wear
Aerospace Fasteners & Brackets: High-velocity finishing cycles on heat-resistant titanium or Inconel structural supports requiring strict dimensional tolerances
Precision-Ground Size 11 Pocket Base: Precision-milled to form a secure nest for all industry-standard 11mm (IC 1/4") internal right-hand threading cutters
"Which square insert is the most reliable for general steel turning where both tool life and resistance to light interruptions are required
ZTGD0404-MM YB9320 (10pcs) ZCC.CT VNMG160408N-GU AC820P whereas VP15TF is a morePVD: YB9320,Designation: ZTGD0404 MM YB9320 Dimension (mm): S: 4. 0,R0. 1: 0. 3,La max: 22, Workpiece Material: Steel: Normal Machining Condition,Stainless Steel: Normal Machining Condition,Heat resistant steel: Normal Machining Condition, Turning Parting & Grooving