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Kennametal TNU544 K21 Triangular Carbide Inserts — precision-ground turning inserts built for heavy-duty cutting of steels and cast irons. Model: TNU544 Grade: K21 Manufacturer: Kennametal Inc. Country of Manufacture: USA Insert Type: Triangular, negative rake, single-sided insert Insert Dimensions: • Size (Inscribed Circle): 5/8 in (15.88 mm) • Thickness (S): 1/4 in (6.35 mm) • Corner Radius (r): 1/64 in (0.4 mm) • Hole Diameter (D1): 0.203 in (5.16 mm) Geometry: TNU (triangular, negative rake, uncoated edge) Material: Cemented tungsten carbide Coating: Uncoated (bright finish) Grade K21 Characteristics: • Universal finishing and medium cutting grade for cast iron and steel • Combines high wear resistance with good toughness • Excellent performance in both continuous and slightly interrupted cuts • Recommended for dry and wet cutting ISO Range: K10–K25, P15–P35 Recommended Cutting Speed: • Steel: 400–900 SFM (120–275 m/min) • Cast Iron: 500–1000 SFM (150–305 m/min) Feed Rate: 0.003–0.012 in/rev (0.08–0.30 mm/rev) Depth of Cut: 0.020–0.200 in (0.5–5.0 mm) Mounting: Fits standard TNU-type toolholders with clamp or screw Color: Gray metallic Quantity: 2 inserts per pack Applications: • General-purpose turning and facing of steel and cast iron • Suitable for CNC and manual lathe operations • Ideal for medium-duty continuous cutting environments Features: • Consistent wear pattern and edge stability • Long service life with reduced chipping • Smooth cutting and stable chip evacuation Please review pictures carefully and let us know if you have any questions!
Condition: New – Open box
Weight: 0.90
Depth: 4.00
Length: 6.00
Width: 4.00
SKU: 11508 4.S7.13.4
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