Sandvik Coromant 5728789 Boring Bar Modular Adapter C6

Product Description

The SANDVIK COROMANT 5728789 is a boring bar modular adapter designed for use with modular tooling systems in precision machining operations. This adapter features a 2.4803-inch (63 mm) bore diameter and a bore depth of 4.8425 inches (123 mm), providing rigid, accurate coupling between modular boring heads and compatible tool bodies. The C6 connection size enables repeatable positioning and secure assembly. Internal coolant delivery directs cutting fluid directly to the cutting zone, supporting longer tool life and improved chip evacuation during deep-bore operations. This part is installed by machinists and toolroom technicians working on CNC lathes and machining centers.

This modular adapter suits precision boring applications in manufacturing environments where consistent bore geometry and surface finish are required. It is configured for internal coolant routing, making it appropriate for deep-bore and production-run scenarios where heat management is critical. The adapter accepts compatible lock screws and coolant screws as specified, allowing integration into standard modular tooling setups. Typical users include CNC machinists, tool-and-die professionals, and production tooling specialists working with modular boring systems in job shop or production floor settings.

Key Features

• C6 connection size for rigid, repeatable modular tooling assembly
• 2.4803-inch (63 mm) bore diameter with 4.8425-inch (123 mm) bore depth
• Internal coolant delivery channel for heat control and chip evacuation at the cutting zone
• Lock screw compatibility with 3214 020-512 for secure clamping
• Coolant screw compatibility with 5691 034-02
• Body length of 4.8425 inches (123 mm) supports deep-bore reach

Compatibility

Designed for use with modular boring bar systems using C6 connection size. Lock screw compatibility: 3214 020-512. Coolant screw compatibility: 5691 034-02. Manufacturer cross-reference part number C6-ASHR3-36125-12-A.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with modular tooling systems. Ensure the machine spindle is fully stopped and all stored energy is released before assembling or disassembling modular components. Use only the specified compatible lock screws and coolant screws; substituting fasteners can compromise clamping integrity and internal coolant sealing. Verify coolant line connections are properly seated and leak-free before returning the tool to service.