Hertel 1000109 Mcln Turning Toolholder 3/4 Inch Shank

Product Description

The HERTEL 1000109 is a right-hand MCLN-style indexable turning toolholder designed for negative rake metal-cutting operations on CNC and manual lathes. The toolholder accepts CN..43. series inserts secured by a clamp-and-screw holding method, providing rigid, repeatable insert positioning under heavy cutting loads. The 3/4 inch by 3/4 inch steel shank and 4.5-inch overall length make it a straightforward fit for standard tool turrets and blocks in production turning environments. Machinists and toolroom technicians working with ferrous and non-ferrous materials will find this holder compatible with a broad range of turning insert geometries within the CN insert family.

This toolholder is suited for external turning applications in both job-shop and production settings. The 5-degree lead angle geometry and negative rake configuration support interrupted-cut stability and longer edge life on materials that benefit from compressive cutting action. The 1.2-inch head length and 1-inch back-of-bar-to-cutting-edge dimension position the insert correctly for standard external turning passes. It is intended for right-hand turning direction and is part of the HERTEL Multi-Option series, which provides flexibility across commonly used insert sizes.

Key Features

• MCLN toolholder style with negative rake for stable, compressive cutting action
• Right-hand holder orientation for standard external turning operations
• Clamp-and-screw insert holding method for secure, repeatable insert seating
• Accepts CN..43. inserts with a 3/8-inch inscribed circle diameter
• Steel shank construction for rigidity and durability in production environments
• No coolant-through configuration; suitable for conventional flood or dry cutting setups

Compatibility

Designed for use with CN..43. series indexable inserts, including complete insert compatibility with CN.. 322 geometry. Verify insert seat and clamping hardware match before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or changing toolholders. Secure the shank fully within the tool block or turret to the depth specified by the machine manufacturer, and confirm insert seating and clamp torque per the insert manufacturer's guidelines before initiating a cut. Inspect the clamp screw and insert pocket for wear or debris prior to each insert change.