Sandvik Coromant 5721121 Face Mill Holder BT30 3/4 in

Product Description

The SANDVIK COROMANT 5721121 is a face mill holder designed for BT30 taper spindles, providing a rigid mechanical interface between the machine spindle and face milling cutters. With a 0.750 inch pilot diameter, this holder accepts standard face mills that rely on a pilot for accurate radial location during heavy-face milling operations. It is primarily installed by machinists and CNC toolroom technicians in machining centers equipped with BT30 spindle interfaces. The overall length of 6.3 inches and symmetric 2.84 inch height and width profile make it suited for compact vertical and horizontal machining center configurations where tool-change clearance is a factor.

This face mill holder is intended for use in BT30-spindle machining centers performing face milling, shoulder milling, and surfacing operations in production and job-shop environments. Typical applications include fixture-mounted workpieces requiring flat or stepped surface generation in steel, aluminum, and cast iron. The 3/4 inch pilot diameter is a common industry standard fitting for mid-range face mill bodies. Installation is performed by CNC operators and toolroom machinists during tool assembly and presetting workflows.

Key Features

• BT30 taper interface for compatibility with JIS B 6339 BT30 spindle standards
• 0.750 inch pilot diameter for accurate radial location of face mill bodies
• 6.3 inch overall length provides gage-line clearance in compact machining centers
• Symmetric 2.84 inch body profile supports balanced rotation at milling speeds
• Weighs 1.28 pounds for reduced spindle load in light-duty BT30 machines

Compatibility

Designed as an OEM-style face mill holder for machining centers with BT30 taper spindles accepting a 0.750 inch pilot diameter face mill body.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machining center spindle before mounting or removing the holder. Use a proper BT30 pull stud torqued with a calibrated retention knob wrench to manufacturer specifications; do not improvise retention hardware. Verify pilot diameter fit and face contact before initiating a cutting program.