Kennametal 1875139 Lh Ddjn Indexable Turning Toolholder

Product Description

The KENNAMETAL 1875139 is a left-hand DDJN-style indexable turning toolholder designed for negative rake cutting operations on CNC and manual lathes. Part of the Kenclamp series, it uses a clamp-style insert holding method and accepts DN..43. series inserts with a 0.5-inch inscribed circle. The shank measures 1 inch wide by 1 inch tall, with an overall length of 6 inches and a head length of 1.25 inches. The back-of-bar to cutting edge distance is 1.25 inches. The body is constructed from steel for rigidity under continuous turning loads. This toolholder is installed by machinists and toolroom technicians in production and job-shop turning applications.

This toolholder is suited for external turning on lathes where left-hand tool orientation is required. The DDJN style provides a 3-degree lead angle, which influences chip direction and cutting forces during longitudinal turning. Negative rake geometry makes it a strong fit for harder workpiece materials and interrupted cuts where insert edge strength is a priority. Coolant-through capability is not included on this holder. It is a single-application tool and is not configured as a multi-use holder.

Key Features

• Left-hand DDJN toolholder style with 3-degree lead angle
• Negative rake geometry for improved edge strength on demanding cuts
• Kenclamp clamp-style insert retention for secure, repeatable insert indexing
• Accepts DN..43. series inserts with 0.5-inch (1/2 inch) inscribed circle
• Steel construction for rigidity under continuous turning loads
• 1 x 1 inch shank cross-section, 6-inch overall length

Compatibility

Accepts DN..43. series inserts (complete insert compatibility: DN.. 432) with a 0.5-inch inscribed circle. Designed as an OEM-style replacement or direct substitute for left-hand DDJN-style indexable turning toolholder applications using the Kenclamp holding system.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Secure the toolholder in the machine turret or tool post according to the machine tool manufacturer torque and clamping specifications. Power down and lock out the lathe before installing or indexing inserts. Verify insert seating and clamp engagement before resuming cutting operations.