Kennametal 1016674 Indexable Shim Boring Bar Issn

Product Description

The KENNAMETAL 1016674 is an ISSN-style indexable shim designed for use in boring bar toolholders with a negative rake configuration. Shims of this type serve as precision seat inserts that position and support indexable cutting inserts within the toolholder pocket, ensuring consistent insert seating and protecting the toolholder body from cutting forces. This shim is sized for a 0.5 inch inscribed circle and measures 0.1875 inches (3/16 inch) thick. Compatible with square insert geometries, it provides a stable foundation for negative rake insert applications in turning and boring operations on lathes and machining centers.

This shim is intended for use in boring bar applications where a 0.5 inch inscribed circle square insert is employed with negative rake toolholders. It is commonly installed in production and job shop environments on CNC lathes, manual lathes, and horizontal boring mills. Machinists and toolroom technicians select ISSN shims when reconditioning toolholder pockets or replacing worn or damaged shim seats to restore accurate insert positioning and extend toolholder service life.

Key Features

• ISSN shim style engineered for negative rake boring bar toolholders
• Fits 0.5 inch inscribed circle square indexable inserts
• Thickness of 0.1875 inches (3/16 inch) for precise insert height control
• Protects toolholder pocket from direct cutting load and insert wear transfer
• Sold individually; order in multiples of 10 per minimum order requirement

Compatibility

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

Installation Notes

Installation is performed by qualified machinists or toolroom technicians during toolholder maintenance or insert changeover. Ensure the toolholder pocket is clean and free of chips, debris, and burrs before seating the shim. Secure the shim with the appropriate clamp screw torqued per the toolholder manufacturer specification. Do not reuse a shim that shows deformation, cracking, or seating surface wear, as a compromised shim will affect insert positioning and surface finish quality.