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Cleveland C42302 4-flute HSS left-hand helix square end mill, uncoated silver finish, Weldon flat shank

Cleveland

Cleveland C42302 4-Flute HSS Left-Hand Helix Square End Mill

SKU CH-7YQ5-3N6J8

Four-flute high-speed-steel left-hand helix square end mill with 0.375 inch diameter, 0.75 inch length of cut and Weldon flat shank

  • Product typeMilling
  • Left-hand helix clears chips in tough materials
  • Four flutes balance finish quality and material removal
  • High-speed steel handles general-purpose milling tasks
  • Weldon flat secures tool in standard holders
  • 375 in diameter suits common machining operations

Precision Milling Tool

The Cleveland C42302 is a 4-flute high-speed steel square end mill designed for general-purpose milling operations. Its left-hand helix and cut configuration directs chips away from the workpiece in specific applications. The uncoated finish suits a variety of ferrous and non-ferrous materials. A Weldon flat on the shank ensures secure clamping in standard tool holders.

Compatibility Check

Verify that your machine spindle and tool holder accept a 3/8 inch diameter shank with a Weldon flat. Confirm the 0.375 inch cutting diameter and 0.75 inch length of cut match the required profile and depth for your job. Ensure the 2 1/2 inch overall length clears the workpiece and fixture without interference. This tool is not for coolant-through systems.

Sustained Cutting Behaviour

High-speed steel construction maintains toughness during extended cuts but generates more heat than carbide alternatives. The 4-flute design distributes chip load evenly across the cutting edges during prolonged engagement. Uncoated surfaces require appropriate cutting fluids or air blast to manage temperature buildup. Left-hand helix geometry provides consistent chip evacuation in deep slots or pockets.

How it compares

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

Price $36.99
Pricier than about 59% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeMilling

Questions about this item

Does the Cleveland C42302 end mill include a tool holder or do I need to buy one separately?

The cutter is supplied as a single square end mill with a Weldon flat shank; a compatible Weldon tool holder must be purchased separately if you do not already have one.

How do I choose between the available sizes for this left-hand helix cutter?

This model is offered in a single configuration — 0.375 in milling diameter, 0.75 in length of cut and 3/8 in shank diameter — so no size selection is required.

What does the 0.375 in milling diameter mean when the tool is running in my milling machine?

It defines the width of cut the four-flute high-speed steel tool will produce in each pass, giving a 3/8 in slot or profile with the 0.75 in flute length engaged.

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