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Cleveland C41911 bright HSS square end mill with Weldon flat shank

Cleveland

Cleveland C41911 2-Flute HSS High Helix Square Single End Mill

SKU CH-MT05-KY0H9

A two-flute high-speed steel end mill with a high helix angle for efficient chip evacuation in milling operations

  • Product typeMilling
  • High-helix design improves chip evacuation in deep slots
  • Two-flute geometry provides generous flute space for efficient material removal
  • High-speed steel construction delivers reliable performance in general-purpose milling
  • Bright uncoated finish suits a wide range of ferrous and non-ferrous materials
  • Weldon flat shank ensures secure, non-slip clamping in standard holders

Cleveland C41911 end mill identity

The Cleveland C41911 is a 2-flute high-speed steel end mill with a high-helix square profile and a Weldon flat shank. It is built for machinists who need a single-end cutter for slotting or profiling in general-purpose milling work.

Sustained cutting behaviour

The high-helix geometry promotes efficient chip evacuation during extended cuts, helping to reduce heat buildup in the cutting zone. The uncoated high-speed steel substrate maintains toughness under continuous load, though it wears faster than carbide when used on abrasive or hardened materials.

Installation and common issues

The 1-inch Weldon flat shank locks securely into standard tool holders with a set screw, simplifying tool changes in the workshop. Ensure the holder is clean and the set screw engages the flat fully; insufficient clamping torque or a worn holder flat can cause the tool to pull out or chatter during heavy cuts.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $110.99
Pricier than about 85% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeMilling

Questions about this item

How much heat does the HSS high-helix end mill generate during extended milling sessions?

High-speed steel with a high helix angle reduces cutting forces and heat buildup compared to standard helix tools, helping the 1-inch diameter cutter stay cooler during long passes.

What tool holder or machine spindle is required to run this 1-inch Weldon-shank end mill?

A Weldon-compatible holder or a milling machine spindle that accepts a 1-inch diameter shank with a flat is needed to secure the cutter.

Will this bright uncoated 4-inch length-of-cut end mill work reliably on older manual knee mills?

Yes, the uncoated HSS construction and Weldon flat suit conventional knee mills, and the high helix geometry improves chip evacuation on lower-rigidity machines.

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