Sandvik Coromant 5727771 Boring Bar Modular Adapter C4

Product Description

The SANDVIK COROMANT 5727771 is a boring bar modular adapter designed for precision internal boring operations on CNC machining centers and turning centers. This adapter features a 1.2598-inch (32 mm) bore diameter and a matching bore depth of 1.2598 inches, providing a secure, concentric interface between the machine spindle and boring bar head. The C4 connection size ensures repeatable positioning and rigid clamping. Internal coolant delivery channels direct cutting fluid to the cutting zone, supporting tool life and chip evacuation during deep or tight-tolerance bore work. Machinists and tooling setters working in production or job-shop environments are the primary installers of this adapter.

This modular adapter is suited for use in both roughing and finishing boring applications where internal coolant supply is required. It is compatible with machine tool setups using the C4 modular tooling interface. The body diameter measures 1.5748 inches (40 mm), and the overall body length is 1.2598 inches (32 mm), making it appropriate for installations with limited overhang requirements. The lock screw thread size is 1.31 inches, compatible with lock screw part number 3212 010-308.

Key Features

• C4 modular connection for repeatable, rigid spindle-to-bar interface
• 1.2598-inch (32 mm) bore diameter and bore depth for precise internal boring
• Internal coolant delivery channels support chip evacuation and tool life
• 1.5748-inch (40 mm) body diameter with 1.2598-inch (32 mm) body length
• Lock screw thread size 1.31 inches, compatible with lock screw 3212 010-308
• Compact geometry suited for limited-overhang boring setups

Compatibility

Designed for use with C4 modular tooling systems. Lock screw compatibility: 3212 010-308. Refer to the SANDVIK COROMANT tooling catalog to confirm fitment with specific boring bar heads and machine spindle interfaces before installation.

Installation Notes

Installation of this modular adapter should be performed by a qualified machinist or tooling technician familiar with modular boring bar systems. Power down and lock out the machine spindle before mounting or removing any tooling adapter. Use the specified lock screw (3212 010-308) and appropriate hex key; verify that all mating surfaces are clean and free of chips or burrs before assembly. Confirm internal coolant port alignment with the machine tool coolant supply before running the spindle.