Kennametal 1893421 Ddqn Indexable Turning Toolholder

Product Description

The KENNAMETAL 1893421 is a right-hand DDQN-style indexable turning toolholder designed for negative rake external turning operations on CNC lathes and manual turning centers. Built on the Kenclamp series platform, it features a 1 inch by 1 inch square steel shank and an overall length of 5 inches. The holder accepts DN..43. series inserts secured by a top clamp, delivering the rigidity needed for interrupted cuts and high-feed roughing passes. The -7-degree negative rake angle promotes insert edge strength and extends tool life in demanding ferrous and hard-material turning applications. Licensed machinists and CNC turning specialists are the primary installers and end users of this toolholder.

This toolholder is suited for external turning on production and job-shop lathes where a square-shank, negative-rake setup is required. The 27.5-degree lead angle positions the cutting edge to reduce radial forces and improve chip flow during longitudinal turning. The 1.25-inch back-of-bar to cutting edge dimension and the 0.50-inch insert inscribed circle make it appropriate for medium to roughing-depth passes on steel, cast iron, and similar machinable alloys. It is a single-purpose holder and is not configured for multi-use or coolant-through delivery.

Key Features

• DDQN toolholder style with right-hand cutting orientation
• Negative rake angle of -7 degrees for enhanced insert edge strength
• Kenclamp top-clamp insert holding method for positive insert location and rigidity
• Accepts DN..43. series inserts with a 0.50-inch inscribed circle
• Steel shank construction for durability in production turning environments
• No coolant-through feature keeps setup straightforward for standard flood coolant applications

Compatibility

Designed to accept DN..432 series indexable inserts as specified by the complete insert compatibility designation. Confirm insert size and geometry against the DN..43. series specifications before ordering inserts separately.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Power down and lock out the lathe spindle before mounting or changing the toolholder or insert. Seat the shank fully in the turret or tool post and torque the clamping screws to the machine or tooling manufacturer specifications. Inspect insert seating and clamp integrity before initiating a cut.