Robbjack C1-301-07 Square End Mill 7/32 in 3 Flute Carbide

Product Description

The ROBBJACK C1-301-07 is a solid carbide square end mill designed for precision milling in metalworking and machining applications. Built to Series C1-301 standards, it features a 7/32 inch (0.2188 inch) cutting diameter, a 5/8 inch length of cut, and a 1/4 inch straight cylindrical shank. The three-flute, right-hand spiral geometry with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. This is an uncoated, centercutting tool, meaning it can be used for plunge cuts as well as peripheral milling. Machinists and tool-and-die professionals select this end mill for applications requiring tight dimensional control.

This end mill is suited for use on CNC machining centers, knee mills, and manual milling machines where a regular-length, small-diameter tool is required. The 2-1/2 inch overall length and 1/4 inch shank make it compatible with standard ER and collet-style toolholders commonly found in production and job-shop environments. It is appropriate for milling steel, cast iron, aluminum, and similar machinable materials at feed and speed parameters appropriate to C2-grade solid carbide. No extended reach is provided, keeping deflection low in close-tolerance work.

Key Features

• Solid carbide construction, C2 material grade, for rigidity and wear resistance
• Three right-hand spiral flutes with 30-degree helix angle for efficient chip evacuation
• Centercutting design allows plunge milling and slot entry without a pilot hole
• Uncoated finish suitable for use with cutting fluids on a wide range of workpiece materials
• Straight cylindrical shank fits standard 1/4 inch collets and ER toolholders
• Regular length geometry minimizes deflection in tight-tolerance slotting and profiling

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide end mill for milling applications requiring a 1/4 inch straight shank and 7/32 inch cutting diameter in standard collet or ER toolholding systems.

Installation Notes

Installation should be performed by a qualified machinist following the machine tool manufacturer guidelines for toolholder torque and runout specifications. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing or seating the end mill in the collet. Verify collet condition and cleanliness before clamping to maintain concentricity and protect the shank diameter tolerance of -0.0001/-0.0002 inch. Do not exceed the recommended depth of cut for the workpiece material and machine rigidity.