Kennametal 1017226 Indexable Shim 3/8 in Boring Bar Ivsn

Product Description

The KENNAMETAL 1017226 is an IVSN-style indexable shim designed for use in boring bar toolholders. The shim seats beneath a diamond-shaped indexable insert and maintains proper insert height and seating geometry throughout the cutting cycle. At 0.125 inches thick and sized for a 3/8-inch inscribed circle insert, it is a precision-ground component that directly affects tool performance and surface finish quality. Negative rake geometry is built into the shim design to match compatible negative-rake insert configurations. This part is sold individually and is intended for replacement in existing toolholder assemblies by machining professionals and toolroom technicians.

This shim is used in boring bar applications where indexable diamond-shaped inserts require a supporting shim beneath the insert pocket. Typical installation scenarios include replacement after insert wear or damage to the seating surface, toolholder refurbishment, and assembly of new boring bar bodies. It is suited for both manual and CNC turning and boring operations in production and job-shop environments where consistent insert positioning is required for dimensional accuracy.

Key Features

• IVSN shim style for compatibility with negative-rake indexable boring bar toolholders
• Fits diamond-shaped inserts with a 3/8-inch (0.3750 inch) inscribed circle
• Thickness of 1/8 inch (0.1250 inch) for precise insert height control
• Negative rake design matches corresponding insert and toolholder geometry
• Sold as a single piece; minimum order quantity of 10 units applies

Compatibility

Designed for use with boring bar toolholders that accept diamond-shaped indexable inserts with a 3/8-inch inscribed circle and require an IVSN-style shim with negative rake geometry.

Installation Notes

Installation is performed by machining professionals or toolroom technicians during insert changes or toolholder maintenance. The machine spindle and all cutting motion must be fully stopped and the machine locked out before accessing the toolholder. The shim seat should be cleaned of chips and debris before the replacement shim is seated to ensure flat, even contact. Do not force the shim into position; proper seating is required to maintain insert geometry and prevent premature tool failure.