Kennametal 1319470 Indexable Shim Boring Bar Iwsn

Product Description

The KENNAMETAL 1319470 is an IWSN-style indexable shim designed for boring bar toolholders running trigon insert geometry. The shim seats between the insert and the toolholder pocket, providing a stable, repeatable seating surface that maintains insert height and protects the pocket from wear. It is machined to a thickness of 0.125 inches and fits inserts with a 0.375-inch inscribed circle. The negative rake geometry of this shim is matched to negative-rake insert and holder configurations. At 0.05 pounds, this is a small but precision-critical component used by machinists and toolroom technicians in CNC and manual boring operations.

This shim is intended for use in boring bar applications requiring trigon-compatible insert seating. Boring bars running negative-rake IWSN-seat inserts in internal diameter turning, facing, or finishing operations are the primary application. The 3/8-inch inscribed circle size positions this shim in smaller-diameter boring bar setups common in both job shop and production machining environments. It is sold individually with a minimum order quantity of 10 units.

Key Features

• IWSN shim style for use with trigon insert geometry
• Negative rake configuration matches negative-rake holder and insert setups
• 0.125-inch thickness provides precise insert height control
• 3/8-inch inscribed circle fits standard smaller-diameter boring bar pockets
• Protects the toolholder pocket from direct insert contact and wear

Compatibility

Designed as an OEM-style replacement shim for boring bar toolholders using IWSN-seat, trigon-geometry inserts with a 3/8-inch inscribed circle and negative rake configuration.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians during insert indexing or replacement. Ensure the toolholder is removed from the machine or the spindle is fully locked and power is off before servicing the insert pocket. Clean the pocket seat thoroughly before placing the shim to prevent seating errors. Do not overtighten the insert screw against a damaged or improperly seated shim, as this can fracture the insert or damage the pocket.