Sandvik Coromant 5721216 Boring Bar Holder CAT50

Product Description

The SANDVIK COROMANT 5721216 is a CAT50 boring bar holder designed for precision machining applications in CNC milling and boring operations. It accepts a 3/4 inch bore diameter and provides a bore depth of 3-3/4 inches (95.25 mm), making it suitable for deep-reach internal machining work. The body measures 29.20 mm in diameter with a body length of 3.75 inches. Internal coolant delivery directs fluid directly to the cutting zone, improving chip evacuation and extending tool life. This holder is installed and serviced by skilled machinists and tooling technicians in machine shop environments.

This boring bar holder fits CAT50 spindle interfaces commonly found on full-size vertical and horizontal machining centers used in production and job-shop settings. The internal coolant feature makes it well suited for deep-bore applications where flood coolant cannot adequately reach the cutting edge. The no-head body style keeps the profile compact for clearance-critical setups. Compatible lock screws include part numbers 5514 022-08, and the coolant screw compatibility is listed as 3214 010-355. The manufacturer part number on the holder body is AA3B20-50 19 095.

Key Features

• CAT50 shank connection for use on full-size machining center spindles
• 3/4 inch bore diameter accommodates standard boring bar shanks
• 3-3/4 inch (95.25 mm) bore depth for extended reach boring setups
• Internal coolant delivery directs fluid to the cutting zone for improved chip evacuation
• 29.20 mm body diameter provides a compact profile for tight clearance applications
• No-head body style reduces interference in confined workpiece geometries

Compatibility

Compatible lock screws: 5514 022-08. Coolant screw compatibility: 3214 010-355. Body marked with manufacturer part number AA3B20-50 19 095. Designed for CAT50 spindle interfaces on CNC machining centers.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before mounting or removing the holder. Ensure mating CAT50 taper surfaces are clean and free of chips or burrs before seating the holder. Use only the specified lock screw sizes listed by the manufacturer to secure boring bars, and verify coolant port alignment before returning the machine to operation.