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High Performance

3400Harmon-i-Cut.

3400 Harmon-i-Cut End Mill

Our Harmon-i-Cut high-performance end mill is designed with a variable helix, unequal index, and varying rake to help minimize the effect of harmonics and chatter in difficult-to-machine ferrous materials.

KCast IronMStainless SteelsNBrass & CopperPSteelsSSuper Alloys (Nickel based, Inconel)4 Flute
Harmon-i-Cut

The 3400 Harmon-i-Cut is a 4-flute, high-performance end mill designed for brass, copper, cast iron, steels, stainless steels, titanium, and nickel-based super alloys, including Inconel. Its variable helix, unequal flute spacing, and varying rake help reduce harmonics and chatter while supporting longer tool life and higher material-removal rates in difficult-to-machine materials.

Key Features
01
Variable Helix, Unequal Index, and Varying Rake helps reduce harmonics and chatter.
02
Capable to rough and finish with one tool.
03
Designed for difficult-to-machine ferrous materials.
3400 Harmon-i-Cut full length
04
4 Individually designed flutes.
05
FC-18 coating is built for high-speed machining with outstanding oxidation resistance, hot hardness, and wear resistance.
The Harmon-i-Cut Lineup/ 134 tools
Varies by Size
Cutting & Shank Diameter
0.1181"TO1.0000"
Neck Diameter
0.2200"TO0.7618"
Flute Length
0.2362"TO2.2500"
Overall Length
1.4961"TO6.0000"
Radius
0.0079"TO0.1200"
Reach
2.0000"TO3.5039"
Consistent Across the Series
GradeHigh Performance
Flutes4
Spiral DirectionRight Hand Spiral
Helix AngleVariable
Cutting TypeCenter
Shank Toleranceh6
Cutting Tolerance+.0000"/-.002"
Weldon FlatAvailable
CoatingFC18
Built to CutKCast IronMStainless SteelsNBrass & CopperPSteelsSSuper Alloys (Nickel based, Inconel)

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Resources

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Best Applications

How the Harmon-i-Cut maps across ISO-513 material groups and machining operations.

RghFinSlotPlngHEM
KCast Iron
NBrass & Copper
Also applicable Steels · Stainless · Super Alloys · Titanium
Not suitedCompositesPlastics

Frequently Asked Questions

It's designed for Brass & Copper, Cast Iron, Stainless Steels, Steels, Super Alloys (Nickel based, Inconel), and Titanium.

It's stocked with FC 18 coating. Our FC18 coating is built for high-speed machining with outstanding oxidation resistance, hot hardness, and wear resistance. Ideal for stainless steels, alloy steels, titanium, and hardened steels.

It's available in Ball, Corner Radius, Square.

The 3400 Harmon-i-Cut is a 4-flute tool.

The 3400 Harmon-i-Cut uses a variable helix angle.

The 3400 Harmon-i-Cut holds a shank tolerance of h6 and a cutter tolerance of +.0000"/-.002" | +0.00mm/-0.05mm.

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