3/16 vs 1/4 Inch End Mill: Which One Should You Buy?

3/16 vs 1/4 inch end mill side by side

Specifications are manufacturer rated, as published on each listing and collected 25 October 2026.

Cutting diameter and shank

The cutting diameter is the size that separates the sides: the LingGan and LU&MN mills list a 3/16 cutting diameter, while the JMIATRY mill lists a 1/4 cutting diameter. Shank size does not follow the same split: the LingGan mill lists a 1/4 shank and the JMIATRY mill lists a 1/4 shank, while the LU&MN listing states no shank size. The LingGan listing pairs a 3/16 cutting diameter with a 1/4 shank, so diameter and shank are separate figures.

Materials

Material separates the 3/16 pair: the LU&MN mills are tungsten carbide, while the LingGan mills are high-speed steel. The JMIATRY mill on the 1/4 side is also high-speed steel by its title and bullets, though its spec table lists high-carbon steel. Materials stated across the listings include wood, aluminum, steel, titanium, alloy steel, cast iron, tool steel, rosewood, density board, acrylic and MDF. The JMIATRY listing also names die steel, carbon steel and PVC among its materials.

Flutes and cut type

All 3 mills list 4 flutes and a square end, so flute count does not separate them. Cut type does differ: the LingGan mill lists non-center cutting, the JMIATRY mill lists center cutting, and the LU&MN mill lists a square nose cut. The listings do not explain what each cut type suits, so treat cut type as a stated difference, not a win for either side.

Set size and value

Set size differs a lot: the JMIATRY set includes 8 pieces in a plastic storage box, the LingGan set includes 5 pieces, and the LU&MN set includes 2 pieces. A bigger set is not automatically better value, since the LU&MN set is carbide while the other sets are high-speed steel by their titles and bullets. The listings state no warranty term for any of the 3 mills.

Choose the 3/16 side if

• You want a carbide mill for alloy steels and hardened steel.
• You want a 5-piece high-speed steel set for wood, aluminum, steel and titanium.
• You want the narrower cutting diameter for smaller cuts.

Choose the 1/4 side if

• You want an 8-piece set in a plastic storage box.
• You want a stated shank diameter of 1/4 with a flute cutting length of 3/4 inch in the bullets (the spec table lists 1.14 inches).
• You want the wider cutting diameter for wider cuts.

Project Match

• Wood, aluminum, steel, titanium, foam and plastic: the LingGan 3/16 set lists all of these.
• Alloy steels, hardened steel, metal, plastic and composite materials: the LU&MN 3/16 set lists these.
• Die steel, carbon steel, alloy steel, cast iron, tool steel, titanium, aluminum, rosewood, density board, wood, acrylic, PVC and MDF: the JMIATRY 1/4 set lists these.
• Work areas or project sizes beyond the stated materials: Not stated.

FAQ: lasers and CNC

What is the difference between a 3/16 and a 1/4 inch end mill?

The cutting diameter: the LingGan and LU&MN mills list 3/16, while the JMIATRY mill lists 1/4. Shank size is separate: the LingGan and JMIATRY mills both list a 1/4 shank.

Which side offers carbide?

The 3/16 side: the LU&MN mills are tungsten carbide. The LingGan and JMIATRY mills are high-speed steel by their titles and bullets.

Do any of these mills state a warranty?

No. None of the 3 listings states a warranty term.

How many pieces come in each set?

The JMIATRY set includes 8 pieces, the LingGan set includes 5 pieces, and the LU&MN set includes 2 pieces.

What materials can these mills cut?

Materials stated include wood, aluminum, steel, titanium, alloy steel, cast iron, tool steel, rosewood, density board, acrylic and MDF. Check the listing for the material you plan to cut.

Related: ball nose vs flat end mill and best 2 flute carbide end mill.