Sandvik Coromant 5726289 Boring Grooving Bar Holder

Product Description

The SANDVIK COROMANT 5726289 is a boring and grooving bar holder designed for precision internal turning operations on CNC lathes and turning centers. It features a 4mm inside diameter bore and a 5/8-inch (16mm) outside diameter shank, with an overall length of 2.165 inches (54.99mm). The head diameter measures 17.5mm, providing stable support during close-tolerance grooving and boring passes. This holder is part of the CoroTurn XS series and includes through-coolant capability, delivering cutting fluid directly to the tool tip for improved chip evacuation and extended insert life. It is sold as a single unit and is intended for installation by machinists and CNC tooling professionals.

The 5726289 is suited for small-diameter internal machining applications where access is restricted and thermal management is critical. Through-coolant delivery makes it a practical choice for deep-bore operations in stainless steel, titanium, and other difficult-to-machine alloys. It is typically mounted in gang-tool or turret-style setups on CNC turning equipment requiring compact, high-precision toolholding in the CoroTurn XS series format.

Key Features

• 4mm inside diameter bore for small-diameter internal turning and grooving
• 5/8-inch (16mm) outside diameter shank for secure turret or block mounting
• Overall length of 2.165 inches (54.99mm) for compact toolpost fitment
• 17.5mm head diameter provides rigidity and stability during interrupted cuts
• Through-coolant design directs fluid to the cutting zone for chip control and heat reduction
• Part of the CoroTurn XS series, engineered for precision small-part machining

Compatibility

Designed for use within the SANDVIK COROMANT CoroTurn XS tooling system. Confirm shank dimensions and coolant port configuration match your machine turret or toolblock before installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before mounting or removing toolholders. Verify that the coolant-through port aligns with the machine turret supply line and that all clamp screws are torqued per the machine tool manufacturer specifications. Do not exceed the maximum spindle speed or depth-of-cut ratings specified in the SANDVIK COROMANT CoroTurn XS product documentation.