end mill - side view

End Mills are solid shank milling tools designed to use side cutting flute edges to machine most materials. There are two cutting styles. Non-center cutting (side cutting only) and center cutting (side and end plunge cutting). End mills listed here are to be considered center cutting except where non-center cutting is indicated.

The ends come in many shapes depending on the type of plunge/center cut or side/contouring cut needed. Available with two flutes, three flutes, four flutes, six flutes and even eight flutes for cutting. More flutes reduces chip load and can improve the surface finish. End mills may have cutting surfaces on one (single end) or both ends (double end). There are a variety of flute lengths and overall lengths including stub length, regular length, long flute, long length, extra long flute, and extended length.

CHOOSE AN END MILL CATEGORY/TYPE
MILLING MACHINE ADAPTERS
Milling Machine Adapters are designed to adapt cutting tool shanks.
Milling Adapters page
SQUARE END
square cut cross section
Square End Style Cut
Square Cut Style End Mills are the most common type of end mill. They are designed to mill square slots, pockets, and edges. Single end mills have one cutting end, while double end mills have two cutting ends, doubling the life of the tool. Most of our end mills are also available with a Titanium Nitride (TiN) Coating for working in harder material and for longer production runs. They are more resistant to wear than uncoated end mills. Other coatings are available where indicated.
HIGH SPEED STEEL
2 FLUTE
Using two flutes allows for maximum chip ejection. All our high speed steel 2 flute end mills are center cutting.
REGULAR LENGTH
Single End - 2 Flute - HSS page 254
Single End - 2 Flute - HSS - METRIC page 257
Double End - 2 Flute - HSS page 255
Double End - 2 Flute - HSS - METRIC page 257
Aluminum Cutting
Designed with a higher helix angle, these end mills clear more chips and generate less heat, making them ideal for milling softer materials, such as aluminum, brass and bronze. Also available in Zirconium Nitride (ZrN) Coating to minimize packing of chips in the flutes and for very fast removal of material. Zirconium nitride can be subjected to higher operating temperatures and is an ideal coating for aluminum cutting end mills.

Single End - 2 Flute - HSS - Aluminum Cutting page 262
Keyway Tolerance
Keyway Tolerance End Mills are commonly used to make keyways in rotary shafts, these end mills have a -0.0015" to 0.0000" mill diameter tolerance for creating a precise fit.

Single End - 2 Flute - HSS - Keyway Tolerance page 254
LONG FLUTE
Long flute style end mills are used when a deeper cut or longer reach is required to mill slots or pockets.

Single End - 2 Flute - HSS - Long Flute page 255
EXTRA FLUTE
Extra flute style end mills are used when an even deeper cut than long flutes can produce is required.

Single End - 2 Flute - HSS - Extra Flute page 255
EXTRA LENGTH
Extra length style end mills are used when an extra deep cut or extra long reach is required.

Single End - 2 Flute - HSS - Extra Length page 255

3 FLUTE
Three flutes remove more material per revolution than two flute end mills. They track straighter, mill at very high feed rates, and create a smoother finish than 2 flute end mills.
REGULAR LENGTH
Single End - 3 Flute - HSS page 263B
Aluminum Cutting
Designed with a higher helix angle, these end mills clear more chips and generate less heat, making them ideal for milling softer materials, such as aluminum, brass and bronze. Also available in Zirconium Nitride (ZrN) Coating to minimize packing of chips in the flutes and for very fast removal of material. Zirconium nitride can be subjected to higher operating temperatures and is an ideal coating for aluminum cutting end mills.

Single End - 3 Flute - HSS - Aluminum Cutting page 262B
LONG LENGTH
Single End - 3 Flute - HSS - Long Flute page 263B
Aluminum Cutting
Single End - 3 Flute - HSS - Long Flute - Aluminum Cutting page 262B
EXTRA LONG LENGTH
Single End - 3 Flute - HSS - Extra Long Length - Aluminum Cutting page 262B
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds. 4 flute end mills are center cutting except where indicated.
REGULAR LENGTH
Single End - 4 Flute - HSS (non-center cuting) page 258
Single End - 4 Flute - HSS page 260
Single End - 4 Flute - HSS - Metric (non-center cuting) page 263
Single End - 4 Flute - HSS - Metric page 263A
Double End - 4 Flute - HSS (non-center cuting) page 261
Double End - 4 Flute - HSS page 261
Double End - 4 Flute - HSS - Metric (non-center cuting) page 263
Double End - 4 Flute - HSS - Metric page 263A
LONG FLUTE
Single End - 4 Flute - HSS - Long Flute (non-center cuting) page 259
Single End - 4 Flute - HSS - Long Flute page 260
EXTRA LONG FLUTE
Single End - 4 Flute - HSS - Extra Long Flute (non-center cuting) page 259
Single End - 4 Flute - HSS - Extra Long Flute page 260
6 and 8 FLUTE
Using six or eight flutes provides a finer finish than four flutes and operates with less vibration when run at high speeds. Our high speed steel 6 and 8 flute end mills are non-center cutting.
REGULAR LENGTH
Single End - 6 Flute - HSS (non-center cuting) page 258
Single End - 8 Flute - HSS (non-center cuting) page 258
SOLID CARBIDE
2 FLUTE
Using two flutes allows for maximum chip ejection. All our solid carbide 2 flute end mills are center cutting.
STUB LENGTH
Double End - 2 Flute - Solid Carbide - Metric page 274
REGULAR LENGTH
Single End - 2 Flute - Solid Carbide page 270
Single End - 2 Flute - Solid Carbide - Metric page 274
Double End - 2 Flute - Solid Carbide page 270
LONG LENGTH
Long length style end mills are used when a longer reach is required to mill slots or pockets.

Single End - 2 Flute - Solid Carbide - Long Length page 271
3 FLUTE
Three flutes remove more material per revolution than two flute end mills. They track straighter, mill at very high feed rates, and create a smoother finish than 2 flute end mills. All 3 flute end mills are center cutting.
REGULAR LENGTH
Single End - 3 Flute - Solid Carbide page 276
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds. All solid carbide 4 flute end mills are center cutting.
STUB LENGTH
Double End - 4 Flute - Solid Carbide - Stub Length page 273
Double End - 4 Flute - Solid Carbide - Stub Length - Metric page 274
REGULAR LENGTH
Single End - 4 Flute - Solid Carbide page 272
Double End - 4 Flute - Solid Carbide page 272
LONG LENGTH
Single End - 4 Flute - Solid Carbide - Long Length page 273
EXTRA LONG LENGTH
Single End - 4 Flute - Solid Carbide - Extra Long Length page 273
SUPER COBALT
2 FLUTE
Using two flutes allows for maximum chip ejection. All our solid carbide 2 flute end mills are center cutting.
REGULAR LENGTH
Single End - 2 Flute - Super Cobalt page 266
Double End - 2 Flute - Super Cobalt page 266
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds. All super cobalt 4 flute end mills are center cutting.
REGULAR LENGTH
Single End - 4 Flute - Super Cobalt page 267
Double End - 4 Flute - Super Cobalt page 267
LONG LENGTH
Single End - 4 Flute - Super Cobalt - Long Length page 267
6 FLUTE
Using six flutes provides a finer finish than four flutes and operates with less vibration when run at high speeds.
REGULAR LENGTH
Single End - 6 Flute - Super Cobalt page 267
LONG LENGTH
Single End - 6 Flute - Super Cobalt - Long Length page 267
BALL END
ball end cross section
Ball End Style Cut
The Ball Nose End Style is used for round bottom holes or slots, and contour milling. Most of our end mills are also available with a Titanium Nitride (TiN) Coating for working in harder material and for longer production runs. They are more resistant to wear than uncoated end mills. Other coatings are available where indicated.
HIGH SPEED STEEL
2 FLUTE
Using two flutes allows for maximum chip ejection.
REGULAR LENGTH
Single Ball End - 2 Flute - HSS page 256
Double Ball End - 2 Flute - HSS page 256
Aluminum Cutting
Designed with a higher helix angle, these end mills clear more chips and generate less heat, making them ideal for milling softer materials, such as aluminum, brass and bronze.

Single Ball End - 2 Flute - HSS - Aluminum Cutting page 262A
LONG LENGTH
Aluminum Cutting
Designed with a higher helix angle, these end mills clear more chips and generate less heat, making them ideal for milling softer materials, such as aluminum, brass and bronze.

Single Ball End - 2 Flute - HSS - Long Length - Aluminum Cutting page 262A
EXTENDED LENGTH
The extra length styles are used when a deeper cut or longer reach is required.

Single Ball End - 2 Flute - HSS - Extra Length page 256
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds.
REGULAR LENGTH
Single Ball End - 4 Flute - HSS page 261
LONG LENGTH
Single Ball End - 4 Flute - HSS - Long length page 261
SOLID CARBIDE
2 FLUTE
Using two flutes allows for maximum chip ejection.
STUB LENGTH
Single Ball End - 2 Flute - Solid Carbide - Stub Length page 271
Double Ball End - 2 Flute - Solid Carbide - Stub Length - Metric page 274
REGULAR LENGTH
Single Ball End - 2 Flute - Solid Carbide page 270
Single Ball End - 2 Flute - Solid Carbide - Metric page 270
Double Ball End - 2 Flute - Solid Carbide page 270
3 FLUTE
Three flutes remove more material per revolution than two flute end mills. They track straighter, mill at very high feed rates, and create a smoother finish than 2 flute end mills.
REGULAR LENGTH
Single Ball End - 3 Flute - Solid Carbide page 276
Single Ball End - 3 Tapered Flutes - Solid Carbide (non-center cutting) page 277
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds.
STUB LENGTH
Single Ball End - 4 Flute - Solid Carbide - Stub Length page 273
Double Ball End - 4 Flute - Solid Carbide - Stub Length - Metric page 275
REGULAR LENGTH
Single Ball End - 4 Flute - Solid Carbide page 275
Single Ball End - 4 Flute - Solid Carbide - Metric page 272
Double Ball End - 4 Flute - Solid Carbide page 272
SUPER COBALT
2 FLUTE
Using two flutes allows for maximum chip ejection.
REGULAR LENGTH
Single Ball End - 2 Flute - Super Cobalt page 266
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds.
REGULAR LENGTH
Single Ball End - 4 Flute - Super Cobalt page 267
TAPERED FLUTE
tapered flute cross section
Tapered Style Cut
Tapered End Mills are designed with a constant spiral to prevent chatter during use and to resist side thrusts and deflection. They are non-center cutting. Primarily for milling die and mold cavities. Sometimes referred to as Taper Degree End Mills or Tapered Milling Cutters.
SOLID CARBIDE
3 FLUTE
Three flutes remove more material per revolution than two flute end mills. They track straighter, mill at very high feed rates, and create a smoother finish than 2 flute end mills.
REGULAR LENGTH
Single End - 3 Tapered Flutes - Solid Carbide (non-center cutting) page 277
Single Ball End - 3 Tapered Flutes - Solid Carbide (non-center cutting) page 277
CORNER RADIUS
corner radius cross section
Corner Radius Style Cut
Corner Radius Style End Mills are designed to mill rounded grooves.
SOLID CARBIDE
Micro-Grain Solid Carbide Corner Radius End Mills were developed for machining tough work hardening metals, stainless steel, titanium, monel, inconel, and super alloys. It is extremely shock resistant.
2 FLUTE
Using two flutes allows for maximum chip ejection.
REGULAR LENGTH
Single End Corner Radius - 2 Flute - Solid Carbide page 279
4 FLUTE
Using four flutes provides a finer finish than two flutes and operates with less vibration when run at high speeds.
REGULAR LENGTH
Single End Corner Radius - 4 Flute - Solid Carbide page 279
CORNER ROUNDING
corner rounding cross section
Corner Rounding Style Cut
Corner Rounding Style End Mills are designed for milling convex (male) quarter round edges on most metals. Form relieved cutters have side and radial clearance and can be sharpened by grinding the face of the teeth without changing their form.
HIGH SPEED STEEL
4 FLUTE
REGULAR LENGTH
Corner Rounding - 4 Flute - HSS page 280
ROUGHING END MILLS
Roughing End Mills are designed for roughing or hogging large amounts of metal prior to a finish mill operation. They are also known as Hogging End Mills.
Roughing End Mills page
MINIATURE END MILLS
Some jobs require specialized miniature end mills to accomplish specific tasks such as working with jewelry, clocks or models.
Miniature End Mills page
DRILL MILLS
Multi-purpose tool for drilling, chamfering, spotting, side milling and countersinking.
Drill Mills page
SINGLE ANGLE CUTTERS
single chamfer cross section
Single Angle Cut
Single Angle Cutters are designed for chamfering or beveling parts, e.g., a 60° cutter can be used to mill a 30° angle. They can be used on manual or CNC machining centers. They are ground for cutting steel.
HIGH SPEED STEEL
Single Angle Shank Cutters - HSS page 284
DOUBLE ANGLE CUTTERS
double chamfer cross section
Double Angle Cut
Double Angle Cutters are designed for milling threads, V-grooves, serrations, and other angular surfaces. These cutters can mill a double angle cut in one pass and can be used on manual or CNC machining centers. They are ground for cutting steel.
HIGH SPEED STEEL
Double Angle Shank Cutters - HSS page 284
CONCAVE RADIUS SHANK CUTTERS
concave radius cross section
Concave Radius Cut
Concave Cutters are designed for milling concave (male) half circles in most metals and may be sharpened without changing their form by grinding the face of the teeth.
HIGH SPEED STEEL
Concave Shank Cutters - HSS page 280
CONVEX RADIUS SHANK CUTTERS
convex radius cross section
Convex Radius Cut
Convex Cutters are designed for milling convex (female) half circles in most metals and may be sharpened without changing their face by grinding the face of the teeth.
HIGH SPEED STEEL
Convex Shank Cutters - HSS page 280
DOVETAIL STYLE CUTTERS
dovetail cross section
Dovetail Style Cut
Dovetail Cutters are designed for milling angular surfaces special shapes, and dovetail slots for joining components.
Dovetail Cutters page
KEY SEAT CUTTERS (WOODRUFF)
key seat cross section
Key Seat Style Notch Cut
HIGH SPEED STEEL
Woodruff Key Seat (Shank) Cutters - Straight Teeth page 283
Woodruff Key Seat Cutters are designed to mill standard Woodruff keyways in steel and other metals.

Woodruff Key Seat (Shank) Cutters - Staggered Teeth page 282
Woodruff Key Seat Cutters with staggered teeth are designed to mill standard Woodruff keyways in steel and other metals. A staggered teeth design cutter reduces chatter, has more chip clearance, and removes more metal at higher speeds than straight teeth cutters.
T-SLOT CUTTERS
t-slot cross section
T-Slot Style Cut
T-slot Cutters are designed to mill slots in machine tool tables and other workholding surfaces.
HIGH SPEED STEEL
T-Slot Cutters page 281
High Speed Steel T-Slot Cutters are designed for milling T-slots into tables and beds of machine tools and similar applications where a good surface finish is required. A vertical slot must be cut first so that neck and shank may enter the cut. Use with standard end mill arbors.
COBALT
Cobalt T-Slot Cutters page 281
Cobalt T-Slot Cutters are designed for milling T-slots into tougher materials where a good surface finish is required. They are used for machining hard, high strength materials up to a hardness of 40 RC. A vertical slot must be cut first so that neck and shank may enter cut. Use with standard end mill arbors.

Cobalt Roughing T-Slot Cutters page 281
Cobalt Roughing T-Slot Cutters are designed for rapid milling T-slots into tougher materials where finish is not as important. They are used for most metals, even hardened steel and aerospace alloys. A vertical slot must be cut first so that neck and shank may enter cut. Use with standard end mill arbors.