Value Collection TCN39540L Turning Insert Round Carbide Tin

Product Description

The VALUE COLLECTION TCN39540L is a solid carbide turning insert with a TiN (titanium nitride) coating, designed for use in CNC and manual lathe turning operations. This insert follows the RD16P designation with an ISO and ANSI code of RD16, featuring a fully round insert shape (Shape Code R) with a positive side clearance and a 15-degree relief angle. The 1-inch inscribed circle and 0.25-inch insert thickness make it a larger-format insert suited for heavy material removal passes. The TiN coating extends cutting edge life by reducing friction and heat buildup at the cutting interface. Installation is via screw-holding method. Sold individually; minimum order quantity is 10 pieces.

This insert is intended for turning operations on workpiece materials classified under primary material codes M and P, which correspond to stainless steels and carbon or alloy steels respectively. It fits toolholders designed to accept round RD16 inserts with a 0.26-inch hole diameter for screw clamping. Typical applications include external and internal profile turning, facing, and contour cuts on mid-to-large diameter workpieces in job shop and production machining environments. The manufacturer grade is TCN55 and the material grade is C5, indicating a general-purpose carbide formulation balanced for toughness and wear resistance across a range of cutting conditions.

Key Features

• Solid carbide substrate with TiN coating for extended tool life and reduced cutting heat
• Round insert shape (RD16) with positive side clearance for smooth chip flow
• 15-degree relief angle reduces rubbing on workpiece surface
• 1-inch inscribed circle (25.40 mm) provides a large cutting edge for heavier cuts
• Screw-held mounting with 0.26-inch hole diameter for secure clamping in compatible toolholders
• Manufacturer grade TCN55, material grade C5 — suitable for steel and stainless steel turning

Compatibility

Designed for use in toolholders that accept RD16 round turning inserts with a screw-clamp holding method and a 0.26-inch hole diameter. Compatible with workpiece materials under primary codes M (stainless steel) and P (carbon and alloy steel) per ISO material classification.

Installation Notes

This insert is installed by a machinist or tooling technician into a compatible screw-clamp toolholder. Always power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torque driver for the clamping screw to avoid cracking the carbide substrate — do not overtighten by hand or with an impact tool. Inspect the insert pocket and clamping screw for wear or damage before seating a new insert.