Kennametal 1017300 Indexable Shim Issn Boring Bar

Product Description

The KENNAMETAL 1017300 is an ISSN-style indexable shim designed for use in boring bar toolholders with a square insert seat. The shim seats beneath a square indexable insert to maintain precise cutting geometry and protect the toolholder pocket from wear and impact damage. It is 3/16 inches thick and fits a 3/4 inch (0.7500 inch) inscribed circle insert size. The negative rake geometry of this shim is matched to negative-rake toolholder configurations, which are common in heavy interrupted cuts and steel turning applications. Machinists and tooling technicians working in production turning, boring, or CNC lathe environments install this shim as part of routine insert-change maintenance or toolholder reconditioning.

This shim is suited for boring bar applications requiring a 3/4 inch inscribed circle square insert with ISSN geometry. It is used in production and job-shop environments on CNC and manual lathes wherever boring bar toolholders see repeated insert changes that can erode the pocket seating surface. Replacing worn shims restores accurate insert positioning and extends toolholder service life. The part is sold individually but carries a minimum order quantity of 10 units, making it appropriate for stocking in a tooling crib or maintenance kit.

Key Features

• ISSN shim style matched to negative-rake square insert boring bar seats
• 3/4 inch (0.7500 inch) inscribed circle for standard square indexable inserts
• 3/16 inch thickness provides consistent insert height and seating depth
• Protects toolholder pocket from insert-impact wear during heavy cutting passes
• Lightweight at 0.0346 pounds, adding negligible mass to the toolholder assembly

Compatibility

Designed as an OEM-style replacement shim for boring bar toolholders using ISSN-geometry seats that accept square indexable inserts with a 3/4 inch inscribed circle and negative rake configuration.

Installation Notes

Installation is performed by qualified machinists or tooling technicians during insert changes or toolholder maintenance. Ensure the machine spindle is fully stopped and the toolholder is removed from the turret or boring bar body before replacing the shim. Clean the insert pocket thoroughly to remove chips and debris before seating the new shim. Follow the toolholder manufacturer torque specifications for the insert clamping screw — do not over-torque, as this can crack the shim or damage the pocket.