Cleveland C61907 4-Flute Carbide Square End Mill .625 in

Cleveland C61907 carbide end mill

This Cleveland C61907 is a 4-flute square end mill made from solid carbide for general-purpose milling. The .625 inch cutting diameter and 1.25 inch length of cut suit slotting and profiling in steel, cast iron and non-ferrous alloys. The straight shank matches a 5/8 inch holder for direct mounting in a milling chuck or collet. Uncooked carbide keeps the edge sharp for short runs and low-volume work.

Thermal performance and power draw

Carbide conducts heat away from the cutting zone faster than high-speed steel, so the flutes stay cooler during continuous cuts. The uncoated surface avoids the insulation effect of some coatings, letting chips carry heat out of the slot. Four flutes spread the load, reducing peak force on each tooth and lowering spindle power demand per revolution. No internal coolant passages means the tool relies on flood or mist coolant from the machine.

Build quality and daily use

The solid carbide body resists deflection better than steel shank tools, holding tighter tolerances on deep pockets. A straight 5/8 inch shank fits standard ER collets and Weldon flats without adapters. Square end geometry leaves a flat bottom, useful for roughing and finishing passes without tool changes. Non-coolant-through design simplifies setup on machines without through-spindle coolant. Uncoated finish means no coating wear to monitor, just resharpen when the edge dulls.