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Undercutting End Mills
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Undercutting Cut Style |
These end mills have a long shank and a cutting edge that curves around the top of the ball end, allowing them to reach into pockets to create undercuts. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. A titanium aluminum nitride (TiAlN) coating allows them to dissipate heat better than other end mills, especially at high speeds. At high temperatures, the coating creates a layer of aluminum oxide that transfers heat to the chips, keeping the tool cool, even when used without lubrication. All are center cutting, allowing plunge cuts into a surface.
Mill | Neck | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dia. Tolerance | Shank Dia. | Dia. | Lg. | Lg. of Cut | Overall Lg. | Flute Spacing | Helix Angle | Tip Angle | For Use On | End Mill Type | Cut Style | Each | |||
Titanium Aluminum Nitride (TiAlN)-Coated Carbide | ||||||||||||||||
4 Flutes | ||||||||||||||||
| 1/8" | -0.002" to 0.000" | 1/8" | 0.094" | 0.18" | 3/32" | 1 1/2" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A31 | 000000 | ||
| 1/8" | -0.002" to 0.000" | 1/8" | 0.094" | 0.18" | 3/32" | 3" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A32 | 00000 | ||
| 1/8" | -0.002" to 0.000" | 1/8" | 0.094" | 1" | 0.084" | 3" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A45 | 00000 | ||
| 3/16" | -0.002" to 0.000" | 3/16" | 0.141" | 0.195" | 9/64" | 2" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A33 | 00000 | ||
| 3/16" | -0.002" to 0.000" | 3/16" | 0.141" | 0.195" | 9/64" | 3" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A34 | 00000 | ||
| 3/16" | -0.002" to 0.000" | 3/16" | 0.141" | 1" | 0.126" | 3" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A42 | 00000 | ||
| 1/4" | -0.002" to 0.000" | 1/4" | 0.188" | 0.21" | 3/16" | 2 1/2" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A35 | 00000 | ||
| 1/4" | -0.002" to 0.000" | 1/4" | 0.188" | 0.21" | 3/16" | 4" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A36 | 00000 | ||
| 1/4" | -0.002" to 0.000" | 1/4" | 0.188" | 1 1/2" | 0.168" | 4" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A43 | 00000 | ||
| 3/8" | -0.002" to 0.000" | 3/8" | 0.281" | 0.241" | 9/32" | 2 1/2" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A37 | 00000 | ||
| 3/8" | -0.002" to 0.000" | 3/8" | 0.281" | 0.241" | 9/32" | 4" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A38 | 00000 | ||
| 3/8" | -0.002" to 0.000" | 3/8" | 0.281" | 1 1/2" | 0.252" | 4" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A46 | 000000 | ||
| 1/2" | -0.002" to 0.000" | 1/2" | 0.375" | 0.271" | 3/8" | 3" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A39 | 000000 | ||
| 1/2" | -0.002" to 0.000" | 1/2" | 0.375" | 0.271" | 3/8" | 6" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A41 | 000000 | ||
| 1/2" | -0.002" to 0.000" | 1/2" | 0.375" | 2" | 0.336" | 6" | Equal | 15° | 220° | Hardened Steel, Iron, Nickel, Stainless Steel, Steel, Titanium | Center Cutting | Undercutting | 8892A44 | 000000 | ||
Finishing Carbide Square End Mills
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Intersecting flutes create a fine finish, making these end mills good for operations requiring light stock removal, such as deburring, profiling, and finishing. Made of solid carbide, they’re harder, stronger, and more wear resistant than high-speed steel and cobalt steel end mills for the longest life and best finish on hard material. Since they have a fine pitch, they last longer than coarse-pitch end mills and produce smaller chips for better performance on harder metal, such as hardened steel and tool steel. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. All are center cutting, allowing plunge cuts into a surface.
Mill | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dia. Tolerance | Shank Dia. | Lg. of Cut | Overall Lg. | Flute Pitch | Flute Spacing | Helix Angle | For Use On | End Mill Type | Cut Style | Each | |||
Uncoated Carbide | ||||||||||||||
4 Flutes | ||||||||||||||
| 1/8" | -0.003" to 0.000" | 1/8" | 1/2" | 1 1/2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A41 | 000000 | ||
| 5/32" | -0.003" to 0.000" | 3/16" | 9/16" | 2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A42 | 00000 | ||
| 3/16" | -0.003" to 0.000" | 3/16" | 5/8" | 2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A43 | 00000 | ||
| 1/4" | -0.003" to 0.000" | 1/4" | 3/4" | 2 1/2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A44 | 00000 | ||
| 5/16" | -0.004" to 0.000" | 5/16" | 13/16" | 2 1/2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A45 | 00000 | ||
| 3/8" | -0.004" to 0.000" | 3/8" | 1" | 2 1/2" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A46 | 00000 | ||
| 1/2" | -0.004" to 0.000" | 1/2" | 1" | 3" | Fine | Equal | 15° | Hardened Steel, Steel, Tool Steel | Center Cutting | Square | 28685A48 | 00000 | ||
Carbide Square End Mills for Honeycomb Panels
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5 Flutes |
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6 Flutes |
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8 Flutes |
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9 Flutes |
Cut into the sides and make slots in honeycomb panels without damaging any layers. Honeycomb panels are commonly used in aerospace and automotive applications because they’re strong yet lightweight, but these same qualities make them difficult to machine. Unlike normal end mills, these have a left-hand helix and push material downward as they cut, preventing layers of the composite material from separating. The serrated edges break the honeycomb into small pieces, minimizing uncut fibers that can occur in composite material. A diamond coating on these end mills allows them to machine abrasive material, such as carbon fiber, fiberglass, and graphite.
They have a square end for milling square-bottomed slots, pockets, and edges. All are center cutting, allowing plunge cuts into a surface. They are good for long production runs. They run twice as fast as other carbide end mills and last up to 30 times longer.
Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking.
End mills with fewer flutes provide better chip clearance for high-volume, high-speed plunge, slotting, and roughing cuts; end mills with more flutes provide a finer finish and operate with less vibration when run at high speeds.
Mill, mm | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dia. Tolerance | Shank Dia., mm | Lg. of Cut, mm | Overall Lg., mm | Flute Spacing | Helix Angle | For Use On | End Mill Type | Cut Style | Each | |||
Diamond-Coated Carbide | |||||||||||||
5 Flutes | |||||||||||||
| 6 | -0.02 to 0.08 | 6 | 18 | 70 | Equal | 15° | Carbon Fiber, Fiberglass, Graphite | Center Cutting | Square | 8388N11 | 0000000 | ||
6 Flutes | |||||||||||||
| 8 | -0.02 to 0.08 | 8 | 24 | 80 | Equal | 15° | Carbon Fiber, Fiberglass, Graphite | Center Cutting | Square | 8388N12 | 000000 | ||
8 Flutes | |||||||||||||
| 10 | -0.02 to 0.08 | 10 | 30 | 90 | Equal | 15° | Carbon Fiber, Fiberglass, Graphite | Center Cutting | Square | 8388N13 | 000000 | ||
9 Flutes | |||||||||||||
| 12 | -0.02 to 0.08 | 12 | 36 | 110 | Equal | 15° | Carbon Fiber, Fiberglass, Graphite | Center Cutting | Square | 8388N14 | 000000 | ||
Carbide Ball End Mills for Tool Steel, Hardened Steel, and Iron
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Ball Cut Style |
Flutes have a low helix angle to provide the cutting forces required for difficult-to-machine material, such as hardened steel and iron. Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent the end mill from breaking. They have a ball end for milling rounded slots, slopes, and contours. All are center cutting, allowing plunge cuts into a surface.
Aluminum Titanium Nitride (AlTiN)-Coated Carbide—An aluminum titanium nitride (AlTiN) or aluminum chromium nitride (AlCrN) coating allows them to dissipate heat better than other end mills, especially at high speeds. At high temperatures, the coating creates a layer of aluminum oxide that transfers heat to the chips, keeping the tool cool, even when used without lubrication. This makes these good for aggressive machining while roughing or making interrupted cuts.
Mill | For Maximum Hardness Rockwell C52 | For Maximum Hardness Rockwell C62 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dia. Tolerance | Shank Dia. | Lg. of Cut | Overall Lg. | Flute Spacing | Helix Angle | For Use On | End Mill Type | Cut Style | Each | Each | ||||
Aluminum Titanium Nitride (AlTiN)-Coated Carbide | |||||||||||||||
2 Flutes | |||||||||||||||
| 1/16" | -0.001" to 0.000" | 1/4" | 1/16" | 2 1/2" | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A12 | 000000 | 8942A42 | 0000000 | ||
| 1/8" | -0.001" to 0.000" | 1/4" | 1/8" | 3" | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A14 | 00000 | 8942A44 | 000000 | ||
| 1/4" | -0.001" to 0.000" | 1/4" | 1/4" | 3" | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A16 | 000000 | 8942A46 | 000000 | ||
| 3/8" | -0.001" to 0.000" | 3/8" | 3/8" | 3" | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A18 | 000000 | 8942A48 | 000000 | ||
| 1/2" | -0.001" to 0.000" | 1/2" | 1/2" | 4" | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A21 | 000000 | 8942A51 | 000000 | ||
| 1 mm | -0.001" to 0.000" | 6 mm | 1 mm | 64 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A28 | 00000 | ——— | 0 | ||
| 2 mm | -0.001" to 0.000" | 6 mm | 2 mm | 64 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A29 | 00000 | ——— | 0 | ||
| 3 mm | -0.001" to 0.000" | 6 mm | 3 mm | 64 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A31 | 00000 | ——— | 0 | ||
| 4 mm | -0.001" to 0.000" | 6 mm | 4 mm | 64 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A32 | 000000 | ——— | 0 | ||
| 6 mm | -0.001" to 0.000" | 6 mm | 6 mm | 64 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A34 | 000000 | ——— | 0 | ||
| 8 mm | -0.001" to 0.000" | 8 mm | 8 mm | 80 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A35 | 000000 | ——— | 0 | ||
| 10 mm | -0.001" to 0.000" | 10 mm | 10 mm | 82 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A36 | 000000 | ——— | 0 | ||
| 12 mm | -0.001" to 0.000" | 12 mm | 12 mm | 100 mm | Equal | 15° | Hardened Steel, Iron, Tool Steel | Center Cutting | Ball | 8942A37 | 000000 | ——— | 0 | ||
