Square End Mills

Square End Mills

Square end mills — also called flat end mills — are the standard milling cutter for profiling, slotting, shouldering and pocket milling. The sharp 90° corner geometry produces clean square shoulders and flat floors, making them the right tool wherever a ball nose or corner-radius profile is not required.

Sutton Tools and Bordo

AIMS stocks solid carbide VHM square end mills from Sutton Tools and Bordo. Sutton's E600 2-flute series offers slot drill centre-cutting capability for direct plunge entry. The E603 and E604 add TiAlN coating in 2 and 4 flute configurations, extending tool life in steel and stainless machining. The E609 extra-long 4-flute series handles deep-reach applications. For very small diameters and ultra-short geometries, the E444 single-flute Ultra series provides rigidity in micro-milling work.

Flute Count

2-flute end mills (slot drills) allow centre cutting and better chip clearance, suited to slotting, plunging and full-width cuts in softer materials. 4-flute end mills carry higher feed rates and produce better surface finishes in profiling, peripheral milling and finishing passes in steel. For aluminium and non-ferrous materials, 2-flute or 3-flute designs are preferred to prevent chip re-cutting.

TiAlN Coating

TiAlN (titanium aluminium nitride) coating significantly increases tool life by improving surface hardness and oxidation resistance at elevated temperatures. It enables higher cutting speeds and works well in dry or minimum-quantity lubrication conditions, particularly in hardened steels, stainless and heat-resistant alloys.

Reach Options

AIMS stocks end mills in short, regular and extra-long reach configurations. Short reach provides maximum rigidity for high-feed work in shallow features. Regular is the general-purpose choice. Extra-long is for deep pockets, tall workpieces and die cavities where a standard reach tool cannot reach the floor — though extra reach requires reduced feeds and depths of cut to manage deflection.

Metric Sizes

All square end mills in the AIMS range are metric diameter. Sizes cover the most common CNC and manual milling requirements from small-diameter profiling up to general-purpose shoulder milling. Match cutter diameter to your toolholder collet or Weldon shank holder.