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End MillRouterMade in USA

C1-401-18

4 Flute Standard Length C-2 Grade Carbide End Mill

0.5625-in Dia 4-Flute End Mill, 1.25-in LOC, 0.5625-in Shank, 3.5-in OAL

4 Flute Standard Length C-2 Grade Carbide End Mill — C1-401-18
Series photo — representative of the C1-401 family
OAL 3.5″Flute 1.25″Shank Ø0.5625″Cutter Ø0.5625″Square
Scaled drawing — true to this tool's dimensions (inch)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack C1-201-16 two flute C-2 grade carbide end mill, 1/2 inch diameter standard length

C-2 grade carbide end mills — the economical 30° helix workhorse for aluminum, plastics and composites.

  • 2 flute (C1-201), 3 flute (C1-301) and 4 flute (C1-401) standard-length square end, all 30° helix
  • C-2 grade carbide substrate
  • 15 inch sizes per flute count from 1/16" to 3/4" diameter, shank matches cutting diameter from 5/32" up
  • DLC (Diamond-Like Carbon) coated versions of every size (-DLC)
  • Metric MC1-201/MC1-301 from 2mm to 25mm diameter
  • Materials: aluminum, copper, magnesium, plastics, composites, brass
  • Tolerances: cutting dia +.000/-.002, shank dia -.0001/-.0002, OAL +/-.060
  • 2 flute rated for slotting, side milling and helical interpolation; 3 and 4 flute for side milling

From the RobbJack Applications Guide.

About this series

C1 C-2 Grade Carbide Standard Length End Mills

Standard-length C-2 carbide end mills in 2, 3, and 4 flute.

The C1 series is an inch-sized line of standard length C-2 grade solid carbide end mills offered in 2-flute (C1-201), 3-flute (C1-301), and 4-flute (C1-401) styles with a 30-degree helix and square end. Cutting diameters range from 1/16 inch up to 3/4 inch.

  • C-2 grade carbide
  • Standard length
  • 30-degree helix
  • Square end
  • 2, 3, and 4 flute versions

Aluminum, Copper, Magnesium, Plastics, Composites, Brass. Diamond-Like Carbon (DLC) coating available; dry, wet, cold air, or spray mist.

Headline spec

Cutting diameters 1/16 inch to 3/4 inch; C-2 grade carbide, standard length.

Best for

  • Slotting
  • Side Milling
  • Helical Interpolation
  • Conventional machining
  • High Performance machining
  • Roughing
  • Semi-Finishing
  • Finishing

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
0.5625″
Diameter ToleranceDC tol
0.0000/-0.0020
Max Cutting DiameterDCX
0.5625″
Shank DiameterDMM
0.5625″
Length of Cut (LOC)APMX
1.25″
Overall Length (OAL)OAL
3.5″
Number of FlutesNOF
4
Helix AngleFHA
30°
Helix HandFHH
Right-hand
Cut Direction
Right-hand cut
End Type
Square End
Center Cutting
Yes — plunges
Series
C1-401 — 4 Flute Standard Length C-2 Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassMagnesiumPlasticsComposites

Applications

Side MillingConventionalHigh PerformanceRoughingSemi-FinishingFinishingDryWetCold AirSpray Mist

See it run

Tolerances

TypeMinMax
Cutting Diameter0-0.003
Length of Cut+0.060
Overall Length+0.06-0.06
Shank Diameter-0.0001-0.0002
Starting at$204.75

Made & shipped in the USA · lead time confirmed at order. Buy at retail or through your distributor.

Performance guaranteed. Run it against the tool you use today — if it doesn't beat it, we'll make it right.

Adds Diamond-Like Carbon (DLC) · $231.80 — our pick for your material. Choose another finish below.

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Download ISO 13399 data (.csv)

Proven in the field

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Finishes (2)

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Starting at

$204.75

Performance guaranteed

More in the C1-401 series

Same series, different size — what changes from this tool is shown in red.