Hertel 1000110 Mdjn Indexable Turning Toolholder 3/4 in

Product Description

The HERTEL 1000110 is a right-hand MDJN-style negative rake indexable turning toolholder designed for general-purpose external turning operations on CNC lathes and manual turning centers. Built from steel with a 3/4 inch square shank, this toolholder accepts DN..43. series inserts secured by a clamp-and-screw holding method. At 4.5 inches overall length with a head length of 1.38 inches and a back-of-bar to cutting edge distance of 1 inch, it provides a rigid, repeatable setup for right-hand turning passes. Licensed machinists and CNC programmers will recognize the MDJN designation as a 3-degree lead angle geometry suited to moderate depth-of-cut applications.

The 1000110 is intended for right-hand turning operations in production and job-shop environments. The negative rake geometry reduces insert edge chipping on interrupted cuts and harder workpiece materials. It is well-suited to steel and cast iron turning where insert edge strength matters more than cutting force reduction. The clamp-and-screw retention keeps the insert seated securely under high feed rates. No coolant-through capability is present, so external coolant delivery is required when flood cooling is used.

Key Features

• MDJN style with 3-degree lead angle for right-hand turning passes
• Negative rake geometry for stronger insert edge on interrupted cuts and harder materials
• Clamp-and-screw insert holding method for secure, repeatable insert seating
• 3/4 inch square shank compatible with standard lathe tool blocks and quick-change posts
• Accepts DN..43. inserts with 1/2 inch inscribed circle
• Steel toolholder body for rigidity and durability in production turning

Compatibility

Designed to accept DN..43. series inserts with a 1/2 inch inscribed circle. Complete insert compatibility reference: DN.. 432. Part of the HERTEL Multi-Option series, cataloged under MDJNR L124B.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the turret or tool post is locked out before changing the toolholder or insert. Torque the clamp screw to the insert manufacturer's specification using the appropriate Torx or hex key. Verify tool centerline height with a reference gauge before commencing the first cut, as MDJN geometry is sensitive to height offset errors.