Iscar 7004439 R-clamp Indexable Toolholder

Product Description

The ISCAR 7004439 is an R-Clamp designed for use in Isoturn series indexable turning toolholders. This clamp secures indexable inserts within the toolholder body, maintaining precise insert positioning during turning operations. It is a direct replacement component used when the original clamp shows wear or damage that could compromise insert retention and cutting accuracy. The 7004439 is compatible with left- and right-hand cut toolholder configurations and works with SR 40090I and SR RC3 clamp screws. At 0.01 pounds, it is a lightweight precision component intended for installation by machinists and toolroom technicians.

This R-Clamp fits a range of Isoturn DDJN-style and related turning toolholders in both metric shank sizes and modular configurations. It is suited for use in production turning environments running external turning operations on CNC lathes and manual engine lathes. The clamp supports both left-hand and right-hand toolholder variants, making it a versatile replacement part for shops running mixed setups. Specific compatible toolholders are listed in the compatibility section below.

Key Features

• R-Clamp design for secure indexable insert retention in Isoturn series toolholders
• Compatible with both left-hand and right-hand cut DDJN-style toolholders
• Works with SR 40090I and SR RC3 clamp screws
• Fits multiple shank sizes including 16 mm, 20 mm, and 25 mm metric shanks as well as modular C5 bodies
• Single-piece replacement component sold individually

Compatibility

Compatible toolholders include: C5 DTUNL-35060-16; DDJNKL/R 2525M-11; DDJNL/R 1616H-11; DDJNL/R 2020K-11; DTGNL/R 2020K-16; DTGNL/R 2525M-16; DWLNL/R 1616H-06; DWLNL/R 2020K-06; DWLNL/R 2525M-06. Compatible clamp screws: SR 40090I and SR RC3.

Installation Notes

Installation and replacement of indexable toolholder clamps should be performed by a qualified machinist or toolroom technician. Before replacing the clamp, ensure the machine spindle is fully stopped and the toolholder is removed from the turret or tool post. Use the appropriate ISCAR clamp screw and torque the screw to the toolholder manufacturer specification using a calibrated torx or hex key — do not overtighten, as this can damage the clamp or insert seating pocket. Inspect the insert pocket and shim for damage before reinstalling a new clamp.