Kennametal 5939456 Indexable Cutoff Toolholder Right Hand

Product Description

The KENNAMETAL 5939456 is an indexable cutoff toolholder designed for parting and grooving operations on CNC lathes and turning centers. Built to the EVSM toolholder style in the Beyond Evolution series, it accepts EG0400M04P04 inserts held in place by a clamp-style insert holding method. The holder delivers a maximum depth of cut of 0.63 inches and accommodates workpiece diameters up to 1.26 inches. Overall length is 6 inches with a 1 inch by 1 inch square shank. Coolant-through capability is built in, supporting through-tool coolant delivery directly to the cutting edge. This toolholder is installed by machinists and CNC tool-room technicians in production turning environments.

The 5939456 is suited for parting off and external grooving on bar-fed CNC lathes handling small to medium workpiece diameters. The 1 inch square shank fits standard turning center tool blocks and quick-change turrets configured for that shank size. The clamp-style insert retention provides repeatable seating for EG0400M04P04 inserts, making it appropriate for high-production runs where insert indexing speed matters. The right-hand configuration places the cutting edge for conventional front-tool-post and gang-tooling setups. Applications span general metalworking, precision component manufacturing, and contract machining shops.

Key Features

• Maximum depth of cut: 0.63 inches, suitable for parting and grooving small-diameter workpieces up to 1.26 inches in diameter
• EVSM toolholder style in the Beyond Evolution series for compatibility with the EG0400M04P04 insert platform
• Clamp-style insert holding method ensures rigid, repeatable insert seating during interrupted and continuous cuts
• Coolant-through design channels cutting fluid directly to the insert tip for improved chip evacuation and tool life
• 1 inch by 1 inch square shank, 6 inches overall length, fits standard CNC lathe tool blocks
• Right-hand orientation for standard front-post and turret lathe setups

Compatibility

Compatible insert: EG0400M04P04 (insert seat size 4, maximum insert width 0.136 inches). Designed for use in CNC turning centers and lathes equipped with tooling blocks accepting a 1 inch square shank. Part of the KENNAMETAL Beyond Evolution parting and grooving system.

Installation Notes

Installation is performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machine spindle before mounting or removing the toolholder from the turret or tool block. Seat the shank fully in the tool block and torque the clamping screws to the machine or tooling manufacturer specifications — do not substitute values not documented for this setup. When indexing inserts, follow the insert manufacturer guidelines for clamp screw torque to maintain proper seating and prevent insert movement under cutting loads.