Hertel 1000692 Turning Insert TPGT3251LF HC210 Carbide

Product Description

The HERTEL 1000692 is a TPGT-style triangular turning insert designed for precision external turning and finishing operations on CNC lathes and manual turning centers. Manufactured from solid carbide with a PVD-applied titanium nitride (TiN) coating under the HC210 grade designation, this insert delivers consistent edge performance across a range of workpiece materials. The neutral hand orientation allows use in standard screw-on toolholders. Key dimensional specs include a 3/8 inch inscribed circle, a 1/64 inch corner radius, and an insert length of 16.50 mm. The screw-on holding method provides secure, repeatable seating in compatible TPGT toolholders used by machinists and toolroom operators.

This insert is suited for finishing and light roughing applications on stainless steels, non-ferrous metals, and superalloys, corresponding to ISO workpiece material groups M, N, and S as primary targets, with group K as a secondary application. The 60-degree triangular geometry, positive rake, and 11-degree relief angle make it well matched for low-force cutting and tight-tolerance turning. A maximum depth of cut of 1.25 mm makes this insert most effective in finishing and semi-finishing passes. It is commonly used in aerospace, general machining, and production turning environments where dimensional accuracy is critical.

Key Features

• Solid carbide construction with PVD TiN coating under HC210 grade for wear resistance
• TPGT insert style with 60-degree triangular geometry and positive rake for low cutting forces
• 11-degree relief angle (clearance code P) supports clean chip clearance and reduced workpiece deflection
• Screw-on holding method ensures rigid, repeatable insert positioning in compatible toolholders
• 1/64 inch corner radius suited for finishing passes requiring tight surface finish tolerances
• Compatible with ISO workpiece material groups M, N, S (primary) and K (secondary)

Compatibility

Designed for use in screw-on TPGT-style toolholders accepting a 3/8 inch inscribed circle triangular insert. Compatible with ISO material grades C2 and C4 applications. Verify toolholder pocket geometry and screw hole diameter (0.1732 inch) before installation.

Installation Notes

Insert seating and replacement should be performed by a qualified machinist with the machine fully stopped and in a locked-out, energy-isolated state. Use the appropriate torx or hex key specified by the toolholder manufacturer to tighten the clamping screw — do not overtighten, as this can fracture the carbide insert. Inspect the toolholder pocket and locating surfaces for chips or debris before seating a new insert. Confirm insert orientation and hand designation match the toolholder before engaging the workpiece.