Choosing a 4-flute solid carbide end mill pack in the tooling cutters and abrasives aisle often comes down to a trade-off between enough cutter for the job and not buying more tool than you need. The core decisions are cutting diameter, length of cut, coating, pack count, and country of origin. These four 4-flute solid carbide end mill packs span from a 1/8" cut to a 3/8" cut and cover uncoated, TiAlN, and AlTiN coatings.
Quick take
All four options are new, solid-carbide 4-flute square end mills. The 1/8" TiAlN set with a 1/2" length of cut sits at the small-diameter end. The 3/8" stub-length set is the only one that steps up to a 3/8" cutting diameter. A compact AlTiN-coated set covers shorter reaches, and a 1/8" uncoated set offers a bright finish.
Listed-price comparison
Listed prices in this group run from $34.59 to $147.95, a spread of $113.36.
| Product | Listed price | Price bar |
|---|---|---|
| 10Pcs 4 Flute 3/32" x 1/8" x 3/8" x 1-1/2" End Mills Solid Carbide AlTiN Coated | USD 38.90 | |
| 5 Pack 3/8" Solid Carbide End Mills - 4 Flute Stub Length TiAlN Coated USA | USD 147.95 | |
| 1/8" Solid Carbide End Mills TiAlN Coated 4 Flute 1/2" LOC 1-1/2" OAL 10PCS | USD 34.59 | |
| 5 Pack 1/8" Solid Carbide End Mills - 4 Flute Center Cutting CNC USA Made | USD 36.65 |
What to weigh before you buy
- Cutting diameter and length of cut: a 1/8" cutter suits detail and finishing; the 3/8" stub-length set uses a 5/8" length of cut for heavier material removal. The 1/8" TiAlN set and the 1/8" uncoated set use a 1/2" length of cut, while the AlTiN-coated set uses a 3/8" length of cut.
- Coating: AlTiN on the compact set, TiAlN on the 1/8" TiAlN set and the 3/8" stub-length set, and uncoated on the 1/8" bright-finish set.
Decision matrix
| If you need... | Pick this set | Why it fits |
|---|---|---|
| Light finishing in a small diameter with TiAlN | 1/8" TiAlN Coated 4 Flute Square End Mills | 1/8" cutting diameter, 1/2" LOC, TiAlN |
| Heavier cutting with a larger stub-length tool | 3/8" Stub Length TiAlN Coated End Mills | 3/8" cutting diameter, 5/8" LOC, TiAlN |
| Compact coated geometry | 3/32" x 1/8" AlTiN Coated End Mills | AlTiN, 30° helix, solid carbide |
| Uncoated 1/8" tooling for general CNC work | 1/8" Uncoated CNC End Mills | Bright finish, 4-flute |
Product notes
10Pcs 4 Flute 3/32" x 1/8" x 3/8" x 1-1/2" End Mills Solid Carbide AlTiN Coated
At a glance, this is the compact AlTiN-coated option of the group. It uses a 4-flute solid carbide body with a 30° helix and a 1-1/2" overall length, so it is designed for close-quarter work rather than deep passes. The 3/8" length of cut puts a clear limit on how much depth you can engage; for deeper material removal, you would need a longer length of cut. The AlTiN coating is described as helpful in harder materials or high-temperature situations, which gives it a different edge profile than uncoated tooling. If you tend to wear out small end mills quickly, the compact body is easy to keep on hand. Keep it for light profiling and detail cuts.
5 Pack 3/8" Solid Carbide End Mills - 4 Flute Stub Length TiAlN Coated USA
This is the only 3/8" solid carbide end mill in this comparison. This 5-pack from S4e1e-YPSM is a stub-length tool, with a 5/8" length of cut and a 2" overall length, and it is TiAlN coated. The larger diameter and shorter length make it a better structural match for heavier machining than a 1/8" tool. The trade-off is that it is more cutter than fine detail work needs, and five tools per order is a smaller spare supply than some larger-count sets. If your machine can handle the bigger diameter, this set is the one that changes the depth-of-cut conversation.
1/8" Solid Carbide End Mills TiAlN Coated 4 Flute 1/2" LOC 1-1/2" OAL 10PCS
The 1/8" cutting diameter, 1/2" length of cut, and 30° helix put this TiAlN-coated 4-flute square end mill squarely in light finishing territory. It has a 1-1/2" overall length, which keeps the tool short enough for stable cuts in shallower workpieces. TiAlN coating adds hardness and heat resistance, useful when spindle speeds climb. Its main limitation is the small diameter: a 1/8" cutter cannot carry the same chip load as a 3/8" tool, so don't plan on heavy roughing with it. For small end mill work in finishing cuts and detail operations, this set matches the intended range.
5 Pack 1/8" Solid Carbide End Mills - 4 Flute Center Cutting CNC USA Made
An uncoated, bright-finish 1/8" end mill from S4e1e-YPSM, this 5-pack is the center-cutting option in the 1/8" group. It is a 4-flute tool with 1/2" length of cut and 1-1/2" overall length, so it can plunge into the work and create square slots. The lack of coating is not a flaw for every job; uncoated carbide can give clean edges on softer materials and avoid the added frictional heat management of coated tools. The main limitation is the pack count: five tools instead of ten means fewer spares if you work through small cutters quickly. Pick this one for the center-cutting capability in a 1/8" format.
Final recommendation
By use case, start with the 1/8" Solid Carbide End Mills TiAlN Coated 4 Flute 1/2" LOC 1-1/2" OAL 10PCS at $34.59 for light finishing and detail work. If the job needs a larger cut width and more rigidity, move up to the 5 Pack 3/8" Solid Carbide End Mills - 4 Flute Stub Length TiAlN Coated USA at $147.95. For the USA-made 1/8" option, choose the 5 Pack 1/8" Solid Carbide End Mills - 4 Flute Center Cutting CNC USA Made at $36.65. If you want a compact AlTiN-coated set with a 3/8" length of cut, the 10Pcs 4 Flute 3/32" x 1/8" x 3/8" x 1-1/2" End Mills Solid Carbide AlTiN Coated at $38.90 rounds out the selection.
