Kennametal 1274800 Indexable Shim Issn Boring Bar

Product Description

The KENNAMETAL 1274800 is an ISSN-style indexable shim designed for use in boring bar toolholders. It supports square inserts and is configured for negative rake geometry. With a thickness of 0.25 inches and an inscribed circle of 0.5 inches, this shim seats the insert correctly within the pocket and maintains proper cutting geometry during turning and boring operations. It is sold individually and is intended for machinists and tooling technicians working with indexable carbide insert systems on CNC lathes and manual boring equipment.

This shim is applied in metal-cutting operations where boring bar toolholders require a precise seating surface beneath the insert. It is suited for both production and job-shop environments. The ISSN shim style and negative rake configuration make it appropriate for toolholders running square inserts in standard negative-rake boring bar pockets. Minimum order quantity is 10 units.

Key Features

• ISSN shim style for negative rake square insert toolholders
• Inscribed circle of 0.5 inches accommodates standard square inserts
• Thickness of 0.25 inches for precise insert height positioning
• Designed for boring bar applications in indexable tooling systems
• Sold per unit with a minimum order quantity of 10

Compatibility

Designed as an OEM-style replacement shim for ISSN-style boring bar toolholders accepting square indexable inserts with a 0.5-inch inscribed circle and negative rake geometry.

Installation Notes

Installation is performed by qualified machinists or tooling technicians during insert indexing or toolholder maintenance. Always power down and lock out the machine before servicing toolholders or replacing shims. Inspect the shim pocket for debris or wear before seating the new shim. Do not reuse damaged or deformed shims, as improper seating will affect insert geometry and surface finish.