Iscar 3600665 Mvjn Negative Rake Indexable Turning Toolholder

Product Description

The ISCAR 3600665 is a right-hand MVJN-style indexable turning toolholder designed for external turning operations on CNC lathes and manual turning centers. It features a 1 inch by 1 inch square steel shank and an overall length of 6 inches, providing rigid support for precision metal removal. The toolholder uses a negative rake geometry at a -10.5 degree primary rake angle, which improves insert edge strength and extends tool life in interrupted cuts and hard materials. It is compatible with VN..33. series inserts and conforms to ISO 13399 tooling data standards. Machinists and CNC technicians working in production turning environments are the primary installers.

This toolholder is suited for right-hand cutting direction turning applications in both production and job-shop environments. The MVJN style is commonly used for straight longitudinal turning and facing passes where a negative-rake insert provides the edge stability needed for consistent surface finish and dimensional control. The 1.69 inch head length and 1.25 inch back-of-bar to cutting edge dimension position the insert correctly for standard tool post and turret mounting configurations. No coolant-through feature is present, making it appropriate for flood or dry cutting setups where internal coolant delivery is not required.

Key Features

• MVJN toolholder style with right-hand cutting direction and negative rake geometry
• 1 inch by 1 inch square steel shank for rigid, stable clamping in standard tool posts and turrets
• Compatible with VN..33. series inserts, including VNMG331-F3M
• 6 inch overall length with a 1.69 inch head length for consistent reach and clearance
• Conforms to ISO 13399 tooling data standards for interoperability with CAM and tool management systems
• Part of the ISCAR Isoturn series, designed for reliable indexable turning performance

Compatibility

Designed for use with VN..33. series inserts, with confirmed compatibility with VNMG331-F3M insert geometry. Fits standard 1 inch square shank tool posts and CNC turret pockets.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before mounting or removing the toolholder from the turret or tool post. Ensure the shank seating surfaces are clean and free of chips or burrs before clamping to maintain proper cutting edge height. Torque clamp screws to the machine or turret manufacturer specifications only — do not use values not provided by the equipment manufacturer.