Sandvik Coromant 5726377 Boring Grooving Bar Holder

Product Description

The SANDVIK COROMANT 5726377 is a boring and grooving bar holder designed for internal turning and grooving operations on CNC lathes and turning centers. It accepts a 4mm (0.1575 inch) inside diameter bore and features a 3/4 inch (19mm) outside diameter shank with a 20mm head diameter. Overall length is 89.99mm (3.543 inches). Built for the CoroTurn XS series, this holder supports through-coolant delivery, directing cutting fluid directly to the cutting zone to manage heat and chip evacuation in tight-bore applications. It is intended for installation by machinists and toolroom technicians running precision internal operations.

This bar holder is suited for small-bore internal turning and grooving applications where access is restricted and thermal management is critical. The through-coolant feature makes it well matched to deep-bore work in materials where chip control and tool life are primary concerns. It is part of the CoroTurn XS series, a tooling system built around small and slender boring bar configurations for Swiss-type and conventional turning centers handling miniature to mid-range bore diameters.

Key Features

• 4mm inside diameter bore for CoroTurn XS compatible inserts
• 3/4 inch (19mm) outside diameter shank for standard collet and sleeve mounting
• 20mm head diameter for rigidity at the cutting end
• 89.99mm overall length for reach into small-bore workpieces
• Through-coolant capability for direct coolant delivery at the cutting zone
• CoroTurn XS series compatibility for consistent insert indexing and repeatability

Compatibility

Designed for use within the SANDVIK COROMANT CoroTurn XS tooling system. Compatible with CoroTurn XS series inserts and tooling components sized for a 4mm bore holder interface. Verify insert and adapter compatibility against the CoroTurn XS product family specifications before installation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with CNC lathe tooling setup. Ensure the machine spindle and coolant supply are fully de-energized and locked out before mounting or removing the holder. Verify shank seating and clamp torque against the machine tool manufacturer's specifications for 3/4 inch OD toolholders. Confirm coolant-through port alignment with the machine's internal coolant supply before operation.