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1/16 vs 1/8 Inch End Mill: Which One Should You Buy?

Three end mills compared by cutting size, nose shape, shank and coating, with two 1/16 examples and one 1/8 example.

LaserEngraveHQ Editorial
By LaserEngraveHQ Editorial · 4 min read
1/16 vs 1/8 Inch End Mill: Which One Should You Buy?
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Top picks at a glance

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  1. 15/16 Inch Shank Carbide Square End Mill5/16 Inch Shank Carbide Square End Mill9.7/10View on Amazon
  2. 2SpeTool 1/8 Inch Spiral Router Bits Up Down Compression BitSpeTool 1/8 Inch Spiral Router Bits Up Down Compression Bit9.7/10View on Amazon
  3. 3SpeTool Spiral Router Bits Down Cut 1/4 inch Cutting DiameterSpeTool Spiral Router Bits Down Cut 1/4 inch Cutting Diameter9.7/10View on Amazon
  4. 4SPEED TIGER Micrograin Carbide Square End MillSPEED TIGER Micrograin Carbide Square End MillView on Amazon
  5. 5LU&MN Carbide Square End MillLU&MN Carbide Square End MillView on Amazon
  6. 61/16" Carbide Square End Mill1/16" Carbide Square End MillView on Amazon
  7. 71/8" Carbide Square End Mill for Aluminum Copper Applications1/8" Carbide Square End Mill for Aluminum Copper ApplicationsView on Amazon
  8. 81/16" 4 Flute Carbide Ball Nose End Mill 1/8" Shank Diameter1/16" 4 Flute Carbide Ball Nose End Mill 1/8" Shank DiameterView on Amazon
  9. 91/16" 4-Flute Square End Mill AlTiN Coated Carbide1/16" 4-Flute Square End Mill AlTiN Coated CarbideView on Amazon

A sign that needs fine lettering, a 3D carving with tight curves, and a steel bracket that needs a clean edge: the bit you pick changes what each job can do. This comparison looks at the 1/16 vs 1/8 inch end mill question through three listings, two on the 1/16 side and one on the 1/8 side.

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Verdict: pick the 1/16 side for fine detail and 3D carving work, where the SpeTool tapered ball nose and the HOZLY flat nose set are listed; pick the 1/8 side for the steel machining the SHARPRO square end mill is listed for. Neither side wins on a shared spec outright: the listings state different figures in most places, and all three list 2 flutes.

Machines on the list

#ProductHQ ScoreBuy
1SpeTool Tapered Ball Nose End Mill 1/4" ShankSpeTool Tapered Ball Nose End Mill 1/4" Shank9.6/10Buy on Amazon
21/8 End Mills 1/8 Inch Shank1/8 End Mills 1/8 Inch Shank9.6/10Buy on Amazon
3CNC Router Bits 1/8" Shank CNC Bit End Mill 1/16"CNC Router Bits 1/8" Shank CNC Bit End Mill 1/16"9.5/10Buy on Amazon
SpeTool Tapered Ball Nose End Mill 1/4" Shank

SpeTool Tapered Ball Nose End Mill 1/4" Shank

SpeTool9.6/10 HQ Score
i
The HQ Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

The SpeTool tapered ball nose end mill has a 1/16 inch cutting radius, a 1/4 inch shank, 2 flutes, a 1 inch cutting length and a ZrN coating, for 3D carving and fine detail work.

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Pros

  • Tapered ball nose for 3D carving and fine detail work
  • ZrN coating with HRC55 hardness stated
  • 2 flutes for smooth cutting through varied materials
  • Stated for hardwood, plywood, MDF, aluminum and acrylic

Cons

  • Title states a 1/16 inch radius while the spec table lists a 0.13 inch cutting diameter
  • Spec table size name reads Dia.=1/8, mixing radius and diameter figures
  • No warranty term is stated
  • Single bit only, not a set
1/8 End Mills 1/8 Inch Shank

1/8 End Mills 1/8 Inch Shank

SHARPRO9.6/10 HQ Score
i
The HQ Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

The SHARPRO square end mill has a 1/8 inch shank, 2 flutes, an AlCrN coating and unequal cutting edge spacing, for alloy steel, stainless steel and cast iron.

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Pros

  • Square end for machining alloy steel, stainless steel and cast iron
  • Unequal edge spacing to reduce vibration
  • Precision within plus or minus 0.02mm stated
  • AlCrN coating for high-temperature machining

Cons

  • Title says AlCrN while the spec table lists AlTiCrN
  • No warranty term is stated
  • Steel-only stated materials; wood is not stated
  • Single bit only, not a set
CNC Router Bits 1/8" Shank CNC Bit End Mill 1/16"

CNC Router Bits 1/8" Shank CNC Bit End Mill 1/16"

HOZLY9.5/10 HQ Score
i
The HQ Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

The HOZLY set holds 5 flat nose carbide end mills with a 1/16 inch cutting diameter, a 1/8 inch shank and a 1/2 inch flute length, for carving, cutting and engraving.

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Pros

  • 5 bits in a storage case
  • Flat nose two-flute spiral upcut design
  • 1/2 inch flute length for relief and surface work
  • Wide stated materials including MDF, hardwood, acrylic and nylon

Cons

  • Short 1/2 inch flute length
  • Set shares one size, so no larger diameter is included
  • No coating is stated
  • No warranty term is stated

Other machines to compare

Side by side

End Mill HQ Score Cutting size Shank Flutes Coating
SpeTool Ball Nose 9.6/10 1/16 in. radius 1/4 in. 2 ZrN
SHARPRO Square End 9.6/10 1/8 in. 1/8 in. 2 AlCrN
HOZLY Flat Nose Set 9.5/10 1/16 in. 1/8 in. 2 Not stated

Specifications are manufacturer rated, as published on each listing and collected 24 October 2026.

1/16 vs 1/8 inch end mill: size and shape

Size labels are where the two sides differ most clearly, but radius and diameter are not the same figure: the SpeTool’s 1/16 inch figure is a cutting radius, while the HOZLY’s 1/16 inch figure is a cutting diameter. On the 1/16 side, the SpeTool is a tapered ball nose with a 1/16 inch cutting radius, a 1/4 inch shank, a 1 inch cutting length and a 2-1/2 inch overall length, while the HOZLY is a flat nose set with a 1/16 inch cutting diameter, a 1/8 inch shank, a 1/2 inch flute length and a 1-1/2 inch overall length. On the 1/8 side, the SHARPRO is a square end mill with a 1/8 inch shank and 2 flutes. The two 1/16 examples differ from each other too: a ball nose suits curved 3D surfaces, while a flat nose suits flat-bottomed cuts, so the side alone does not settle the choice. See our ball nose vs flat end mill guide for how nose shape changes a cut.

Materials each side lists

The listings point each side at different work. The SpeTool lists hardwood, plywood, MDF, aluminum and acrylic for 2D and 3D carving. The HOZLY lists MDF, ABS, PVC, acrylic, nylon, resin and hardwood for carving, cutting and engraving. The SHARPRO lists alloy steel from HB 125 to 400, stainless steel from HB 200 to 300, and cast iron from HB 155 to 260, with no wood or plastic named. That split is the real divide here: the 1/16 listings describe detail work across wood, plastic and metal, while the 1/8 listing describes steel machining. For steel work specifically, see our best end mill for steel guide.

Coatings and precision

Coating and precision claims split along listing lines, not side lines. The SpeTool states a ZrN coating and HRC55 hardness. The SHARPRO title states an AlCrN coating, while its spec table lists AlTiCrN instead, so trust the title figure and treat the coating as AlCrN with a spec table mismatch. The SHARPRO also states precision within plus or minus 0.02mm and cutting edges with unequal spacing to reduce vibration. The HOZLY states no coating, describing a solid carbide spiral upcut design for smooth cutting and fast chip removal. No listing on either side states a warranty term, and none states a safety certification, so both score zero on those criteria.

Choose the 1/16 side if

  • You want fine detail and 3D carving, where the SpeTool tapered ball nose is listed.
  • You want a set of flat nose bits for small cutting and engraving jobs, where the HOZLY set of 5 is listed.
  • Your work runs across hardwood, plywood, MDF and acrylic, as both 1/16 listings describe.

Choose the 1/8 side if

  • You machine alloy steel, stainless steel or cast iron, as the SHARPRO listing describes.
  • You want a square end for flat-bottomed cuts in metal.
  • Precision within plus or minus 0.02mm and vibration-reducing edge spacing matter for your jobs.

For more end mill comparisons, see 1/8 vs 1/4 inch end mill.

Project Match

  • Fine detail and 3D carving in hardwood, plywood, MDF or acrylic: the SpeTool tapered ball nose.
  • Small flat-nose cutting and engraving in MDF, hardwood or acrylic: the HOZLY set.
  • Machining alloy steel, stainless steel or cast iron: the SHARPRO square end mill.
  • Anything beyond the materials above: Not stated for these picks.

FAQ: lasers and CNC

Is the 1/16 side better for detail work?

The 1/16 listings name fine detail work, 3D carving and 3D relief sculpturing, while the 1/8 listing names steel machining. Neither side is better overall; the project decides.

What is the difference between the two 1/16 examples?

The SpeTool is a tapered ball nose with a 1/4 inch shank and a 1 inch cutting length, while the HOZLY is a flat nose set of 5 with a 1/8 inch shank and a 1/2 inch flute length. Nose shape and shank differ, so they suit different cuts even on the same side.

Can the 1/8 pick cut wood?

Not stated. The SHARPRO listing names alloy steel, stainless steel and cast iron only, with no wood named.

Do any of these state a warranty?

No. None of the three listings states a warranty term, so all three score zero on warranty.

Which shank sizes do these bits use?

The SpeTool uses a 1/4 inch shank, while the HOZLY and the SHARPRO each use a 1/8 inch shank.

Related: best end mill for aluminum, carbide vs high speed steel end mill, 1/8 vs 1/4 inch end mill and the CNC tooling hub.

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