Seco 75051590 Mwln Indexable Boring Bar Right Hand

Product Description

The SECO 75051590 is a right-hand MWLN-style indexable boring bar designed for internal turning operations on CNC lathes and manual turning centers. Built from steel with a 1-inch shank diameter and 12-inch overall length, it accepts WNMG 332 trigon-style inserts held by a pin-and-clamp system. The minimum bore diameter is 1.2 inches, making it suited for moderate to deep internal bores. With a negative rake angle of -14 degrees and a lead angle of -5 degrees, this bar delivers controlled chip formation and stable cutting performance during right-hand turning passes.

This boring bar is used in precision turning applications where internal diameter finishing or semi-finishing is required. It is appropriate for both production shop and job shop environments running steel, cast iron, and similar materials at standard cutting parameters. The MWLN toolholder style is a widely recognized standard in indexable turning, and this bar fits tooling setups where a 1-inch shank is the specified holding diameter. The insert inscribed circle of 3/8 inch and a center-to-cutting-edge measurement of 0.640 inches define the cutting geometry for this bar.

Key Features

• MWLN toolholder style with pin-and-clamp insert retention for secure, repeatable insert indexing
• Accepts WNMG 332 trigon inserts with a 3/8-inch inscribed circle and 3/16-inch insert thickness
• 1.2-inch minimum bore diameter and 12-inch overall length for reach into deeper bores
• Negative rake geometry (-14 degrees rake, -5 degrees lead angle) for stable cutting on harder workpiece materials
• Right-hand cutting direction; steel shank construction for rigidity
• No coolant-through — external coolant application required

Compatibility

Compatible with WNMG 332 trigon-style inserts (insert size code 33, compatible insert size 187R). Designed for right-hand turning applications requiring a 1-inch shank diameter holder in MWLN-style tooling setups.

Installation Notes

This boring bar is installed and serviced by qualified machinists or tooling technicians. Before changing inserts or adjusting the bar, ensure the machine spindle is fully stopped and the machine is in a safe, locked-out state. Secure the 1-inch shank in a properly sized boring bar holder or turret station and verify tool overhang does not exceed recommended limits for the workpiece setup. Follow the machine tool manufacturer and insert supplier guidelines for speed, feed, and depth-of-cut parameters appropriate to the workpiece material.