Sandvik Coromant 6239445 Replaceable-tip Drill 21-21.99mm 5xd

Product Description

The SANDVIK COROMANT 6239445 is a replaceable-tip drill body from the CoroDrill 870 series, engineered for precision hole-making in metalworking and machining applications. The body accepts 870-2190-21-PM insert tips at insert seat size 21, covering a drill diameter range of 21.00 to 21.99 mm (0.8268 to 0.8657 inches). Maximum drill depth reaches 113.28 mm (4.46 inches), representing a 5xD depth-to-diameter ratio. Overall length is 193.00 mm (7.60 inches). The straight-cylindrical shank fits the 870 LX-5 toolholder style. Through-coolant capability is built in, supporting chip evacuation and tool life in demanding cutting conditions. This tool is installed and operated by machinists and CNC programmers on machining centers and drill presses.

This drill body is suited for production drilling operations requiring consistent diameter accuracy in the 21 to 21.99 mm range. The 5xD depth ratio makes it appropriate for moderately deep hole applications in steel and similar workpiece materials. Through-coolant delivery is particularly valuable in high-feed or interrupted-cut scenarios where heat buildup and chip packing are concerns. The CoroDrill 870 platform is designed for indexable-tip drilling, allowing tip replacement without removing the body from the spindle, which reduces changeover time on production lines.

Key Features

• Replaceable-tip design using 870-2190-21-PM insert tips at seat size 21
• Drill diameter range: 21.00 to 21.99 mm (0.8268 to 0.8657 inches)
• 5xD depth-to-diameter ratio with maximum drill depth of 113.28 mm (4.46 inches)
• Through-coolant capability for improved chip evacuation and thermal management
• Straight-cylindrical shank compatible with 870 LX-5 toolholder style
• Steel tool body construction for rigidity and durability in metal-cutting applications

Compatibility

Designed for use with 870-2190-21-PM replaceable insert tips at insert seat size 21. Toolholder style is 870 LX-5 with a straight-cylindrical shank. Part of the CoroDrill 870 series platform.

Installation Notes

Installation and setup should be performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully stopped and the tool is secured in the appropriate 870 LX-5 toolholder before inserting or removing the replaceable tip. Verify through-coolant lines are clear and pressure is within the machine specification before running. Follow the tooling manufacturer guidelines for insert torque and seating to avoid tip movement during cutting.