Description

The SECO 03204984 is a solid carbide ball end mill from the JMB112 series, designed for precision milling in hard and difficult-to-machine materials. With a 0.0315 inch (0.80 mm) mill diameter and a 2-flute helical geometry, this single-end tool delivers clean material removal in both roughing and finishing operations. The 28-degree medium helix angle promotes chip evacuation while maintaining edge stability at small diameters. An HXT PVD coating extends tool life by increasing surface hardness and thermal resistance. The micrograin carbide substrate supports tight tolerances and consistent performance at depth.

This end mill is suited for high-precision machining applications where small-diameter tooling is required, including die and mold work, micro-feature machining, and detail work in hard material grades. The extended-reach configuration, with a 1.60 mm reach length and 0.76 mm neck diameter, allows access to narrow slots and recessed features without interference. The straight-cylindrical shank measures 6.00 mm in diameter with an h5 tolerance, making it compatible with standard collet and shrink-fit toolholders. This tool is intended for use by machinists and toolroom professionals working on CNC milling equipment.

Key Features

0.0315 inch (0.80 mm) ball diameter with a nose radius of 0.40 mm for precise contour milling
Solid micrograin carbide construction for rigidity and dimensional stability at small diameters
HXT PVD coating rated for hard material applications, improving wear resistance and heat management
Extended-reach design with 1.60 mm reach length and 0.76 mm neck diameter for recessed feature access
28-degree medium helix, right-hand cut, right-hand flute for effective chip evacuation
Single-end configuration with 50.00 mm overall length and 6.00 mm straight-cylindrical shank

Compatibility

Designed for use in CNC milling applications targeting hard material workpieces (material code H). The 6.00 mm straight-cylindrical shank with h5 tolerance fits standard collet chucks and shrink-fit holders dimensioned for that shank size. Manufacturer catalog reference: JMB112008G1BZ2.0-HXT.

Installation Notes

Installation should be performed by a qualified machinist following the toolholder manufacturer’s runout and clamping specifications. Maximum TIR is 0.01 mm verify runout at setup before cutting. Coolant-through is not supported; external coolant or air blast should be directed at the cutting zone. Inspect the cutting edge under magnification before each use, as small-diameter carbide tools are susceptible to chipping if mishandled or dropped.