Kennametal 1017276 Indexable Shim Boring Bar Itsn

Product Description

The KENNAMETAL 1017276 is an ITSN-style indexable shim designed for boring bar toolholders operating with a negative rake geometry. The shim seats beneath a triangular indexable insert, providing a stable, repeatable seating surface that protects the toolholder pocket from damage during cutting. Measuring 0.1875 inches thick and sized for a 0.5-inch inscribed circle insert, this shim maintains precise insert height and orientation across index cycles. It is a standard replacement and service component used by machinists and toolroom technicians in production turning and boring operations.

This shim is intended for use in indexable boring bar assemblies that accept triangle-profile inserts with a 0.5-inch (0.5000-inch decimal) inscribed circle. It is suited to both light and heavy-duty boring operations in CNC and manual lathe applications where negative rake tooling is specified. The ITSN designation identifies the shim geometry to match specific Kennametal and compatible toolholder pocket configurations. Machinists servicing worn or damaged insert pockets will typically replace this shim at the same interval as the insert or seating screw.

Key Features

• ITSN shim style matched to negative rake boring bar toolholders
• Compatible insert shape: Triangle with 0.5-inch inscribed circle
• Thickness of 0.1875 inches (3/16 inches) for precise insert seating
• Protects toolholder pocket from insert-contact wear during interrupted or continuous cuts
• Sold individually; minimum order quantity of 10 units per order

Compatibility

Designed for indexable boring bar toolholders that accept ITSN-style shims with a triangular insert profile and a 0.5-inch inscribed circle in a negative rake configuration. Consult your toolholder documentation to confirm shim style and inscribed circle requirements before ordering.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians during insert indexing or toolholder servicing. Ensure the machine spindle is fully stopped and the toolholder is removed or secured before replacing the shim. Clean the pocket seating surface and verify the replacement shim matches the existing ITSN style and thickness before torquing the insert clamping screw to the toolholder specification. Do not reuse a cracked or deformed shim, as it will compromise insert stability and dimensional accuracy.