Sandvik Coromant 5757529 Indexable Toolholder Shim

Product Description

The SANDVIK COROMANT 5757529 is a shim for indexable toolholders, designed to seat and support indexable inserts within a toolholder pocket. The shim provides a stable foundation for the cutting insert, distributing cutting forces and protecting the toolholder pocket from wear and damage during machining operations. It carries a 0.4724 inch inscribed circle (IC) size and a thickness of 3/16 inch (0.1875 inch decimal). The positive rake geometry and compatibility with left hand, neutral, and right hand cutting directions make this shim a versatile component for a range of turning and boring applications. Machinists and tooling technicians install this part when replacing worn shims or rebuilding indexable toolholder assemblies.

This shim is used in indexable toolholder assemblies on CNC lathes, turning centers, and manual engine lathes where insert pocket protection and precise seating are required. It suits applications involving moderate to heavy cutting loads where shim integrity is critical to insert stability and part finish quality. The 176.39 shim style designation identifies the specific pocket geometry this shim is designed to fit. Orders are fulfilled in single-piece package quantities with a minimum order of 10 units.

Key Features

• 0.4724 inch inscribed circle size for precise insert pocket fitment
• 3/16 inch (0.1875 inch) thickness for consistent insert seating depth
• Positive rake geometry supports efficient chip flow and reduced cutting forces
• Compatible with left hand, neutral, and right hand cutting directions
• 176.39 shim style matches specific toolholder pocket profiles
• Protects toolholder pocket face from insert-induced wear and chipping

Compatibility

Designed as an OEM-style replacement shim for indexable toolholders using the 176.39 shim style with a 0.4724 inch inscribed circle pocket. The manufacturers catalog number for this shim is 176.39-851.

Installation Notes

Installation is performed by a machinist or tooling technician. Before replacing a shim, ensure the machine is powered down, the spindle is locked, and all stored energy is released per shop lockout/tagout procedures. Inspect the toolholder pocket for damage or debris before seating the new shim. Do not use the shim in a pocket that shows cracks or deformation, as this can compromise insert clamping integrity and create an unsafe condition.