Robbjack SR-2-031 Square End Mill 1/32 in 2 Flute Carbide

Product Description

The ROBBJACK SR-2-031 is a square end mill designed for precision milling in tight geometries and small-feature work. Manufactured from solid carbide in the Tuffy material grade, it delivers the rigidity and wear resistance needed for demanding cuts in ferrous and non-ferrous materials. The cutter measures 0.031 inches in diameter with a 0.093-inch length of cut and a 1/8-inch straight cylindrical shank, giving a compact profile suited for micro-milling applications. A 30-degree helix angle and spiral flute geometry promote efficient chip evacuation. This tool is installed and operated by machinists and CNC tooling professionals on vertical machining centers and CNC mills.

The SR-2-031 is built for small-feature profiling, slotting, and contouring where minimal cutter diameter is required. Its centercutting design allows plunge entry, expanding its use in pocketing operations. The uncoated finish makes it well suited for non-ferrous metals, plastics, and composites where coating adhesion or heat buildup is not a primary concern. The regular-length configuration and 1-1/2-inch overall length keep deflection low in precision fixtures and small-part setups.

Key Features

• 0.031-inch mill diameter with plus or minus 0.0005-inch diameter tolerance for tight dimensional control
• Solid carbide Tuffy grade construction for rigidity and extended tool life
• 30-degree helix spiral flute promotes smooth chip flow and reduces cutting forces
• Centercutting geometry enables direct plunge entry into workpiece material
• Right-hand cut and right-hand flute configuration for standard spindle operation
• 1/8-inch straight cylindrical shank fits standard collets and toolholders

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide square end mill for CNC machining centers and manual mills accepting a 1/8-inch straight shank collet or toolholder.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the spindle is fully stopped and locked out before changing tooling. Seat the shank fully in the collet to the minimum grip depth recommended by the toolholder manufacturer to prevent pullout. At 0.031 inches in diameter, feeds and speeds must be dialed conservatively to avoid tool breakage - do not exceed the cutter manufacturer's recommended parameters for the workpiece material.