Sandvik Coromant 5727626 Indexable Boring Bar Left Hand

Product Description

The SANDVIK COROMANT 5727626 is a steel indexable boring bar in the T-Max P series, designed for precision internal boring and turning operations on CNC lathes and machining centers. It accepts a single CNMG 432 insert secured by a wedge clamping system, delivering a negative 6-degree rake angle and a negative 6-degree lead angle for stable, controlled cutting. The left-hand holder has a 1.5-inch shank diameter, a 12-inch overall length, and a minimum bore diameter of 1.76 inches (44.70 mm). Coolant-through capability is built in, supporting higher cutting speeds and extended insert life in demanding applications.

This boring bar is suited for internal diameter machining in medium to heavy material removal applications. Its multi-use designation allows it to run both boring and turning operations from a single setup, reducing tool changes on the floor. The A-DCLN toolholder style and wedge insert retention make it a standard choice for shops running negative-rake CNMG geometry inserts on lathes with left-hand tool stations. Typical materials machined include steel, cast iron, and similar workpiece materials common in production and job-shop environments.

Key Features

• Minimum bore diameter of 1.76 inches (44.70 mm) for tight internal bore access
• Wedge clamping system locks CNMG 432 inserts securely under heavy cutting loads
• Coolant-through design directs fluid directly to the cutting zone for chip control and heat management
• Left-hand cut orientation for use in left-hand tool stations or reverse-rotation setups
• Multi-use capability supports both boring and turning without changing the holder
• Steel shank construction provides rigidity over the 12-inch overall length

Compatibility

Accepts CNMG 432 inserts with a 0.50-inch inscribed circle. Toolholder style is A-DCLN. Part of the SANDVIK COROMANT T-Max P series. Verified compatible insert thickness is 0.1875 inches (3/16 inch).

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the CNC control is locked out before mounting or removing the boring bar from the turret or tool block. Verify the shank is fully seated and clamped to the required depth in the holder before engaging coolant or initiating a cutting cycle. Replace worn or chipped inserts before resuming cuts to avoid tool deflection or workpiece damage.