Kennametal 1096253 Lh Mdjn Indexable Turning Toolholder

Product Description

The KENNAMETAL 1096253 is a left-hand MDJN-style negative rake indexable turning toolholder designed for precision external turning operations on CNC and manual lathes. Part of the Kenloc series, it features a clamp-and-screw insert holding method that provides rigid, repeatable insert positioning under heavy cutting loads. The toolholder accepts DN..43. style inserts with a 0.5000-inch inscribed circle, making it suited for steel, cast iron, and other ferrous materials where negative rake geometry is preferred for edge strength and insert longevity. The 3/4-inch square shank and 4.5-inch overall length are standard for most tool turrets in this size class.

This toolholder is intended for use in production turning environments including job shops, contract machining operations, and maintenance facilities running general-purpose turning programs. The left-hand orientation positions the cutting edge for specific tool station assignments on multi-turret or gang-tooled lathes. A 3-degree lead angle provides controlled chip direction and is commonly specified for shoulder turning and medium-depth facing passes. Licensed machinists and CNC programmers specify this style for applications requiring consistent tool nose geometry with quick insert changes.

Key Features

• Left-hand MDJN toolholder style with negative rake for increased insert edge strength
• Kenloc clamp-and-screw holding method for rigid insert seating and repeatability
• Accepts DN..43. inserts with a 0.500-inch inscribed circle
• 3/4-inch square shank fits standard tool turret pockets in this size class
• 4.5-inch overall length with a 1.38-inch head length for compact turret clearance
• Steel toolholder construction for durability in continuous and interrupted cuts

Compatibility

Designed to accept DN.. 432 style inserts as specified by the manufacturer. Verify insert designation and toolholder pocket size against your machine turret specifications before ordering.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Power down and lock out the machine spindle before mounting or removing the toolholder from the turret. Torque the turret clamping screws to the machine manufacturer's specification, not to a generic value. Insert seating surfaces should be clean and free of chips before installing a new insert to maintain proper tool nose radius alignment.