Seco 00043227 Indexable Boring Bar 1.78 in Right Hand Steel

Product Description

The SECO 00043227 is a steel indexable boring bar designed for internal boring and turning operations on CNC lathes and manual turning centers. Built to the MWLN toolholder style, it accepts WNMG 432 trigon inserts secured by a pin and clamp holding method, providing rigid, repeatable insert location. With a minimum bore diameter of 1.78 inches, a 1-1/2 inch shank diameter, and a 14-inch overall length, this bar suits medium-to-large bore applications where rigidity and reach are both required. The negative rake geometry at -13 degrees and a -5 degree lead angle are suited to heavier interrupted cuts and hard materials. Installation and setup are handled by machinists and tool-room technicians.

This boring bar is applied in production and job-shop environments where WNMG 432 insert tooling is already part of the standard insert program. Typical use cases include finish and semi-finish boring of steel, cast iron, and similar ferrous workpieces on lathes with sufficient bore clearance to accommodate the 1-1/2 inch shank. The right-hand cutting configuration suits conventional right-to-left boring passes. Cutting tool applications include internal boring and external turning where the setup allows. Coolant-through capability is not included on this bar.

Key Features

• MWLN toolholder style with pin and clamp insert holding for secure, repeatable insert seating
• Accepts WNMG 432 trigon inserts with a 1/2 inch inscribed circle and 3/16 inch insert thickness
• 1.78 inch minimum bore diameter with a 1-1/2 inch shank diameter for rigid overhang in medium-to-large bores
• 14 inch overall length provides extended reach for deep-bore applications
• Negative rake angle of -13 degrees and -5 degree lead angle suited to heavier cuts in ferrous materials
• Right-hand cut orientation for standard lathe boring passes

Compatibility

Compatible with WNMG 432 trigon inserts with a compatible insert size code of 43/44 and an insert inscribed circle of 1/2 inch. Designed for boring and turning applications on lathes and turning centers that accommodate a 1-1/2 inch shank diameter.

Installation Notes

This boring bar is installed and qualified by machinists or tool-room technicians familiar with lathe tooling setup. Power down and lock out the machine before changing inserts or setting tool offsets. Ensure the shank is fully clamped in the tool block or turret with adequate contact length to minimize overhang deflection. Follow the insert manufacturer's recommended torque procedure for the pin clamp to avoid insert movement under cutting load.