Kennametal 1953337 Internal Grooving Toolholder

Product Description

The KENNAMETAL 1953337 is an indexable internal grooving toolholder designed for right-hand boring bar applications in CNC turning centers and lathes. It accepts A4..03.. series inserts secured by a clamp-style insert holding method, providing rigid, repeatable cutting edge positioning. The toolholder delivers a maximum depth of cut of 0.394 inches and a minimum groove width of 0.118 inches. Through-coolant capability channels fluid directly to the cutting zone, supporting chip evacuation and extended insert life during internal grooving operations. The body is constructed from steel for durability in production turning environments. This toolholder is installed and set up by machinists and CNC turning specialists.

This toolholder is suited for internal grooving and recessing operations on parts with a minimum hole diameter of 1.26 inches (32 mm). It is rated for a maximum bore depth of 1.97 inches, making it appropriate for a range of bore depths encountered in medium-duty production turning. The A-A4E toolholder style and multi-use designation allow it to handle a variety of internal groove profiles when paired with compatible A4 series inserts. Typical applications include snap-ring groove cutting, undercut machining, and internal profile work on steel, cast iron, and similar workpiece materials in both job shop and production settings.

Key Features

• Maximum depth of cut of 0.394 inches for internal grooving operations
• Minimum groove width of 0.118 inches with A4..03.. insert compatibility
• Through-coolant design directs fluid to the cutting edge for improved chip control and tool life
• Clamp-style insert holding method provides secure, repeatable indexing
• Steel toolholder body for rigidity and resistance to deflection in bore applications
• Multi-use tool designation supports varied internal groove profiles with the A4 insert series

Compatibility

Compatible with A4..03.. series inserts. Insert seat size is 3. Designed for use in boring bar setups requiring a minimum hole diameter of 1.26 inches. The MSC and manufacturer cross-reference number for this toolholder is A16RA4EMR/L0310N.

Installation Notes

Installation and setup should be performed by a qualified machinist familiar with CNC turning tooling. Before installing or changing inserts, ensure the machine spindle is fully stopped and the machine is placed in a safe, locked-out state per shop safety protocols. Verify the boring bar shank is properly clamped and torqued in the turret or tool block according to machine tool manufacturer specifications before initiating a cut. Confirm through-coolant connections are secure and flow is verified prior to running the first part.