Hertel 1000099 Mcln Indexable Turning Toolholder 1/2 in

Product Description

The HERTEL 1000099 is a right-hand MCLN-style indexable turning toolholder designed for negative rake external turning operations on CNC and manual lathes. Built from steel with a 0.5 inch x 0.5 inch shank and an overall length of 4 inches, this toolholder accepts CN..32. series inserts — specifically CNMG 322 — secured via a clamp and screw holding method. The 5-degree lead angle and 0.75 inch back-of-bar to cutting edge dimension suit a range of external turning, chamfering, and profiling applications. Installation is handled by machinists and toolroom technicians as part of standard turret or tool post setups.

This toolholder is suited for external turning applications in production and job-shop environments on both CNC lathes and conventional turning centers. The MCLN style with negative rake geometry is commonly used for interrupted cuts and general-purpose material removal on steel and cast iron workpieces. The 3/8 inch insert inscribed circle (0.375 inches) provides adequate edge strength for moderate to heavy depths of cut. It is part of the Hertel Multi-Option series, which is engineered for versatility across common lathe configurations.

Key Features

• Right-hand MCLN toolholder style with 5-degree lead angle for external turning operations
• Negative rake geometry suited for interrupted cuts and general-purpose steel and cast iron turning
• Clamp and screw insert holding method provides rigid, repeatable insert indexing
• Accepts CNMG 322 inserts with a 3/8 inch (0.375 inch) inscribed circle
• Steel shank construction at 0.5 inch x 0.5 inch for standard tool post and turret compatibility
• Overall length of 4 inches with a 1 inch head length for reach and rigidity balance

Compatibility

Designed to accept CN..32. series inserts, with complete compatibility confirmed for CNMG 322 inserts. Fits standard tool posts and turret stations accepting a 0.5 inch x 0.5 inch shank. Also referenced under manufacturers catalog numbers MCLNR and L083A.

Installation Notes

Installation is performed by a machinist or toolroom technician. Ensure the machine spindle is fully stopped and the lathe is locked out before mounting or adjusting the toolholder in the turret or tool post. Torque the insert clamp screw to the insert manufacturer's specified value using the appropriate Torx or hex key. Verify tool centerline height and back-of-bar dimension before taking the first cut.