Robbjack MDM-201-04 Ball End Mill 4mm 2 Flute Carbide

Product Description

The ROBBJACK MDM-201-04 is a solid carbide ball end mill engineered for die and mold work in hard materials. Part of the MDM-201 series, this single-end mill features a 4 mm (0.1575 inches) cutting diameter, a 2-flute helical geometry with a 30-degree helix angle, and a 75 mm overall length. The 6 mm straight-cylindrical shank provides rigid tool holding in standard collets and end mill holders. An extended-length design allows reach into deeper cavities and pockets common in die and mold applications. This tool handles both roughing and finishing passes, making it a practical choice when tool changes need to be minimized.

The MDM-201-04 is suited for machining hard materials in die and mold environments, including hardened tool steels and similar high-hardness workpieces. The extended reach and 4 mm length of cut (reach length 4 mm) support contoured surfaces and deep-cavity floor finishing. It is intended for use in CNC machining centers by machinists and tooling professionals working in precision mold shops, tool rooms, and production environments where tight tolerances and surface finish are critical.

Key Features

• 4 mm ball nose cutting diameter with plus or minus 0.008 mm diameter tolerance for precision fitment
• 2-flute right-hand helical geometry at 30 degrees supports chip evacuation in hard material cuts
• Solid carbide construction delivers the rigidity and wear resistance required in hard material milling
• 75 mm overall length (plus or minus 1.00 mm tolerance) with extended reach for deep cavity access
• 6 mm straight-cylindrical shank fits standard collet chucks and shrink-fit holders
• Single-end design; optimized for both roughing and finishing operations in a single tool

Compatibility

Designed as an OEM-style replacement and standard tooling option within the ROBBJACK MDM-201 series for CNC machining centers requiring a metric 4 mm ball end mill with a 6 mm shank in hard material die and mold applications.

Installation Notes

Installation should be performed by a qualified machinist following shop safety protocols. Power down and lock out the spindle before loading or unloading the tool. Seat the shank fully in the collet or tool holder to the recommended gauge line and torque the retention nut per the tool holder manufacturer specifications. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates wear on small-diameter carbide tools.