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The SECO 00034046 is a carbide threading insert designed for precision thread-cutting operations on both internal and external threads. Using the LCGN1603-G55 geometry, it covers an external pitch range of 1.75 to 3.00 mm and a TPI range of 14 to 8, making it suitable for a wide range of threading applications in production and job-shop environments. The insert carries SECO manufacturer grade CP500, a PVD-coated micrograin carbide grade known for wear resistance on steel and stainless materials. With a 55-degree included angle and neutral hand orientation, this insert fits standard MDT series toolholders. Installation is performed by machinists and tooling technicians on CNC lathes and threading machines.
This insert is used in metalworking applications where consistent thread form and tool life are critical. The MDT series designation places it within SECO tooling systems designed for multi-directional threading passes. The FG chipbreaker geometry supports controlled chip evacuation during internal and external threading cycles. It is suited for both light production runs and higher-volume threading operations across a range of workpiece materials. Each package contains one insert, with a minimum order quantity of 10 units.
Designed for use in SECO MDT series threading toolholders accepting LCGN 1603 style inserts with a 55-degree included angle.
Threading inserts should be seated and torqued per the toolholder manufacturer specifications using the correct torx or hex key. Ensure the machine spindle is fully stopped and all motion is locked out before changing inserts. Inspect the insert pocket and seating surface for chips or debris prior to installation. Verify thread pitch and TPI settings on the CNC program before the first threading pass.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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