End Mills

4-Flute Square End Mill — AlCrN

The general-purpose workhorse. Four flutes, a 38° helix and an AlCrN coating that holds up in dry and minimum-lubrication machining of steel.

Material grade Sub-micron carbide, K20–K30
Coating AlCrN
Flutes 4
Diameter range Ø1–20 mm
Helix angle 38°
Tolerance h6, ±0.005 mm
Shank h6 ground, HA
Application Roughing and finishing

Reply within 24 hours on business days · Samples available before volume · NDA on request

About this tool

A four-flute square end mill that covers most of what a job shop does in a week: slotting, shoulder milling, pocketing and finishing. The 38° helix and a sub-micron carbide substrate give it a wide working window, and the AlCrN coating lets it run dry or with minimum lubrication without giving up tool life.

Where it works

Steel, cast iron and stainless at moderate to high cutting speeds. A good first choice where the setup is rigid and the operation changes from part to part.

Cutting data — starting point

Starting values for a rigid setup with a good coolant supply. Treat them as a first trial, then adjust to the machine, the holder and the actual condition of the material.

Work material Cutting speed vc Feed Depth of cut
Carbon steel (P) 180–260 m/min 0.03–0.06 mm/tooth 0.5×D
Stainless (M) 90–140 m/min 0.02–0.04 mm/tooth 0.3×D
Cast iron (K) 150–220 m/min 0.03–0.05 mm/tooth 0.4×D
Hardened steel 45–55 HRC (H) 70–110 m/min 0.015–0.03 mm/tooth 0.2×D

What you can specify

  • Diameter, corner radius and flute count ground to your drawing
  • Coating — AlCrN, AlTiN, TiAlN, DLC or uncoated, matched to the workpiece
  • Shank — h6 ground, HA / HB / whistle-notch
  • Laser-marked part number, or blank shanks for distributor stock

Not sure about the geometry? Send the drawing or a photo of the part. We recommend the profile, the coating and the starting cutting data — and quote from there.

Why it works

  • Sub-micron carbide balances wear resistance and edge toughness
  • AlCrN coating resists oxidation to 1,100 °C — comfortable dry machining
  • 38° helix evacuates chips cleanly in steel and cast iron
  • Centre-cut, so it plunges as well as it side-cuts
  • Ground and inspected against the drawing before it ships
Related

Other tools in End Mills

View category

3-Flute Square End Mill — Aluminium

Polished three-flute geometry with a high helix, built for aluminium and non-ferrous work at high spindle speeds.

Ø3–16 mm · 3 · Uncoated / polished

Can't find the geometry you need?

Most of what we ship is ground to a drawing. Send yours — we quote within 24 hours.