Hertel 1002803 Mdpn Neutral Indexable Turning Toolholder

Product Description

The HERTEL 1002803 is a neutral-hand MDPN-style indexable turning toolholder designed for use with DN..332 series inserts. Built around a 0.75 inch x 0.75 inch square shank and an overall length of 4.5 inches, this toolholder applies a negative rake geometry that increases cutting edge strength and supports interrupted cuts and hard materials. It is intended for use on manual engine lathes and CNC turning centers where repeatable insert indexing and rigid shank clamping are required. Machinists and toolroom technicians select this holder when running negative-rake carbide inserts on ferrous and non-ferrous workpieces requiring consistent tool life and dimensional accuracy.

This toolholder is suited for single-point external turning operations on both manual and CNC lathes. The neutral hand orientation means the cutting edge is centered on the shank centerline, making it usable on either right-hand or left-hand setups depending on tool post configuration. The MDPN style seats DN..332 inserts, which are a common diamond-shaped 55-degree insert geometry used in profiling and straight turning applications. It is appropriate for production turning, tool room work, and general-purpose lathe operations in job shops and manufacturing environments.

Key Features

• MDPN toolholder style with neutral hand orientation for flexible setup on right- or left-hand configurations
• Negative rake geometry increases cutting edge strength for interrupted cuts and harder materials
• Compatible with DN..332 insert series — a widely available 55-degree diamond insert geometry
• 0.75 inch x 0.75 inch square shank fits standard tool posts and turrets in that bore size
• Overall length of 4.5 inches provides adequate reach for typical external turning applications
• Single insert seat design for straightforward indexing without additional setup

Compatibility

Designed to accept DN..332 series indexable inserts. Shank dimensions of 0.75 inch x 0.75 inch are compatible with tool posts and turret stations sized for that shank cross-section.

Installation Notes

Installation is performed by qualified machinists familiar with lathe tooling setup. Before mounting or changing inserts, power down the machine and bring all spindle motion to a complete stop. Secure the shank in the tool post or turret to the proper clamping torque per the machine tool manufacturer specification — do not rely on finger-tight clamping. Follow the insert manufacturer seating and torque guidelines when indexing or replacing DN..332 inserts to ensure correct cutting geometry and safe operation.