Seco 00043209 Indexable Boring Bar 3 in Bore 2 in Shank

Product Description

The SECO 00043209 is an indexable boring bar designed for internal boring and turning operations on CNC lathes and machining centers. Built on an A-MDUN toolholder style with a 2 inch shank diameter and 16 inch overall length, this right-hand cutting tool accepts DNMG 432 diamond-shaped inserts secured by a pin and clamp holding method. The 93-degree lead angle and negative 5-degree rake angle are suited for productive roughing and finishing passes in steel and similar materials. Coolant-through capability helps manage heat and chip evacuation in deep bore applications. Weighing 1 pound, the bar is constructed from steel for rigidity under cutting loads.

This boring bar is sized for applications requiring a minimum bore diameter of 3 inches, making it appropriate for medium to large diameter internal turning work. Typical use cases include finish boring of housings, sleeves, and bored holes on production lathes and turning centers in industrial machining environments. The cutting direction is right hand, and the tool is intended for single-purpose boring and turning use rather than multi-purpose setups. Licensed machinists and CNC operators in job shops and production facilities are the primary users of this toolholder.

Key Features

• Accepts DNMG 432 diamond inserts with a 0.5 inch inscribed circle and 3/16 inch insert thickness
• Pin and clamp insert holding method for secure, repeatable insert seating
• Coolant-through design supports chip control and tool life in deep bore cuts
• 93-degree lead angle with negative 5-degree rake for controlled cutting geometry
• 2 inch shank diameter and 16 inch overall length for extended reach applications
• Right-hand cutting direction; steel toolholder construction for rigidity

Compatibility

Designed to accept DNMG 432 compatible inserts with insert size code 43/44. Suitable for A-MDUN toolholder style setups requiring a 2 inch shank and a minimum bore diameter of 3 inches.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. The machine spindle must be powered down and the turret locked before mounting or changing toolholders. Use the appropriate torque wrench and insert clamping screw to seat the DNMG insert securely before cutting. Verify coolant-through passages are clear and that the coolant supply line is connected before beginning operations.