Dorian Tool 73310151063 Lh Mvjn Indexable Turning Toolholder

Product Description

The DORIAN TOOL 73310151063 is a left-hand MVJN-style indexable turning toolholder designed for negative-rake external turning operations on manual and CNC lathes. It features a 3/4 inch by 3/4 inch square shank and an overall length of 4.5 inches, making it a compact, rigid choice for precision turning applications. The insert is secured using a combination clamp and pin holding method, providing positive clamping force and repeatable edge positioning. Compatible with VNM_332 inserts with a 3/8 inch inscribed circle, this toolholder is intended for machinists and tool-room professionals working in production or job-shop environments.

This toolholder is suited for left-hand cutting direction applications where material removal is performed in the conventional left-to-right feed orientation on a lathe. The MVJN style delivers a 3-degree lead angle, which influences chip flow and tool-to-workpiece engagement. It does not support coolant-through capability, so external coolant delivery is required when cutting heat-sensitive materials. It is appropriate for general-purpose external turning on a variety of workpiece materials using negative-rake VNM-style inserts.

Key Features

• Left-hand MVJN toolholder style with 3-degree lead angle for controlled chip direction
• Clamp and pin insert holding method for secure, repeatable insert positioning
• Negative rake geometry with a rake angle of -13 and -6 degrees
• 3/4 inch by 3/4 inch square shank, 4.5 inches overall length
• Compatible with VNM_332 inserts, 3/8 inch inscribed circle
• No coolant-through capability; designed for external coolant setups

Compatibility

Designed for use with VNM_332 series negative-rake inserts with a 3/8 inch (0.3750 inch) inscribed circle. Fits standard 3/4 inch square shank tool blocks and turrets on manual and CNC lathes.

Installation Notes

Installation and tool changes should be performed by qualified machinists with the machine powered down and the spindle fully stopped. Ensure the toolholder shank seats fully and squarely in the turret or tool block before tightening to prevent deflection under cutting loads. Insert clamping hardware should be inspected and free of chips or debris before seating a new insert. Follow machine-tool manufacturer guidelines and applicable shop safety procedures when setting tool height and offset values.