Seco 00041052 Indexable Boring Bar 1.78 in Min Bore Mcln

Product Description

The SECO 00041052 is a right-hand MCLN-style indexable boring bar designed for internal turning operations on CNC lathes and turning centers. Built from steel, it features a 1.5-inch shank diameter and a 14-inch overall length, giving it the reach needed for deep-bore applications. The tool accepts CNMG 432 inserts secured by a pin-and-clamp holding method, delivering reliable insert location and repeatability. Through-coolant capability directs fluid to the cutting zone, helping manage chip evacuation and heat in demanding materials. A negative rake angle of -12 degrees and a -5-degree lead angle are engineered into the geometry to suit the MCLN insert style. Licensed machinists and CNC tool-and-die technicians are the primary installers of this toolholder.

This boring bar is suited for internal diameter turning in both production and job-shop environments. The 1.78-inch minimum bore diameter makes it appropriate for medium-to-large bore work where rigidity and insert accessibility are both required. Its through-coolant design is particularly useful in materials that generate significant heat or produce long, stringy chips. The 0.89-inch center-to-cutting-edge dimension and a 0.5-inch insert inscribed circle accommodate the CNMG 432 insert geometry in a right-hand cutting direction.

Key Features

• MCLN toolholder style accepts CNMG 432 diamond-shaped inserts
• 1.78-inch minimum bore diameter for medium-to-large internal turning
• 14-inch overall length provides deep-reach capability
• Through-coolant port improves chip evacuation and cutting zone temperature control
• Pin-and-clamp insert holding method ensures repeatable insert positioning
• Negative rake (-12 degrees) and -5-degree lead angle matched to MCLN insert geometry

Compatibility

Designed for use with CNMG 432 indexable inserts in MCLN-style toolholder configurations for right-hand internal turning applications.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Ensure the machine spindle is fully stopped and the coolant system is depressurized before mounting or removing the boring bar. Verify shank-to-bore fit and proper tool projection before engaging a cut. Confirm through-coolant line connections are secure and free of obstruction before resuming coolant flow.