Seco 00043196 Mcln Indexable Boring Bar Left Hand

Product Description

The SECO 00043196 is a left-hand MCLN-style indexable boring bar designed for internal turning operations on CNC and manual lathes. Built from steel, it features a 3/4-inch shank diameter and a 10-inch overall length, making it well suited for reaching deep bores without sacrificing rigidity. The minimum bore diameter is 1 inch, and the tool uses a pin-and-clamp insert holding method for secure, repeatable insert positioning. The negative rake geometry and -5-degree lead angle are optimized for stable, controlled cuts in a range of workpiece materials. Installation and setup are straightforward for machinists familiar with indexable tooling systems.

This boring bar is intended for turning and internal boring applications in production and job-shop environments. It accepts CNMG 322 inserts with a diamond shape and a 3/8-inch inscribed circle, giving operators access to a wide selection of grades and coatings for different materials. The left-hand cutting direction makes it the correct choice for operations where the tool advances from left to right, or for specific machine orientations requiring left-hand tooling. It is a single-purpose tool and is not designed for multi-use or cross-application use.

Key Features

• Left-hand cutting direction with -5-degree lead angle and -14-degree rake angle for controlled chip formation
• Accepts CNMG 322 diamond-shaped inserts with pin-and-clamp holding for positive insert retention
• 1-inch minimum bore diameter accommodates a practical range of internal turning applications
• 3/4-inch shank diameter with 10-inch overall length provides reach and stability in deep-bore setups
• Steel construction for durability in production turning environments
• Negative rake geometry suited to interrupted cuts and harder workpiece materials

Compatibility

Designed for use with CNMG 322 indexable inserts with a compatible insert size code of 32 and a 1/8-inch insert thickness. This tool does not include coolant-through capability.

Installation Notes

Installation should be performed by a qualified machinist following standard lathe tooling setup procedures. Ensure the machine spindle is fully stopped and locked out before mounting or adjusting the boring bar. The shank should be clamped securely in a tool block or turret station with sufficient overhang minimized to reduce chatter. Verify insert seating and clamp torque against the insert manufacturer's guidelines before beginning a cut.