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MNR-204-08

2 Flute Standard Length Metric C-2 Grade Carbide End Mill

8mm Dia 2-Flute Metric End Mill 16mm LOC, 8mm Shank, 63mm OAL

OrderingMNR-204-08·Uncoated·$91.60Change finish

2 Flute Standard Length Metric C-2 Grade Carbide End Mill — MNR-204-08
Series photo — representative of the MNR-204 family
OAL 63 mmFlute 16 mmShank Ø8 mmCutter Ø8 mmSquare
Scaled drawing — true to this tool's dimensions (mm)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack NR Series C-2 grade carbide end mill, standard length

2, 3, and 4 flute C-2 grade carbide end mills in standard length -- an economical non-ferrous line in 64th-inch sizes from 1/16" to 1", with explicit flats and no-flats part numbers and DLC coating.

  • C-2 carbide grade, square end, 30-degree helix, standard length in three flute counts: NR-204 (2 flute), NR-303 (3 flute), NR-404 (4 flute)
  • Comes in 64th-inch sizes -- 2 and 4 flute tables run from 1/16" to 1" including half sizes; 3 flute from 1/16" to 3/4"
  • Flats and no-flats versions carry distinct part numbers: sizes on 3/8" and 1/2" shanks (plus 5/8", 3/4", 1") are listed both with flats and as -NF no-flats tools; smaller sizes come without flats
  • Coating options are uncoated or DLC (Diamond-Like Carbon), in both flats and no-flats versions
  • Metric MNR-204 (2 flute) and MNR-303 (3 flute) run 2 mm to 25 mm; metric tools do not have flats
  • Applications: slotting, side milling, and helical interpolation (2 and 3 flute), side milling and high performance work from roughing through finishing; run dry, wet, cold air, or spray mist
  • Materials: aluminum, copper, magnesium, plastics, composites, brass, and wood
  • Tolerances: cutting diameter +.001/-.000, shank diameter -.0001/-.0002, flute length +.030/-.000 (1/16" to 5/16") or +.060/-.000 (21/64" to 1"), OAL +/-.060; MNR cutting diameter +.025/-.000 mm

From the RobbJack Applications Guide.

About this series

MNR Metric C-2 Grade Carbide End Mills

Metric C-2 grade standard-length end mills

The MNR is the metric version of the NR standard-length C-2 Grade carbide end mill, offered in 2, 3 and 4 flute configurations.

  • 2, 3 and 4 flute, square end
  • 30 degree helix
  • Cutting Dia. tolerance +.025/-.000 mm
  • Shank Dia. tolerance -.002/-.005 mm

Available uncoated and in Diamond-Like Carbon (DLC) coating

Best for

  • Side milling
  • Slotting
  • Helical interpolation
  • High-performance roughing
  • Semi-finishing
  • Finishing
  • Aluminum, copper, magnesium, plastics, composites, brass and wood

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
8 mm
Diameter ToleranceDC tol
0.025/0.000
Shank DiameterDMM
8 mm
Length of Cut (LOC)APMX
16 mm
Overall Length (OAL)OAL
63 mm
Number of FlutesNOF
2
Helix AngleFHA
30°
Helix HandFHH
Right-hand
Cut Direction
Right-hand cut
End Type
Square End
Center Cutting
Yes — plunges
Shank Flats
Standard
Series
MNR-204 — 2 Flute Standard Length Metric C-2 Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassMagnesiumPlasticsComposites

Applications

SlottingSide MillingHelical InterpolationHigh PerformanceRoughingSemi-FinishingFinishingDryWetCold AirSpray Mist

See it run

Tolerances

TypeMinMax
Cutting Diameter+0.0250
Length of Cut+0.5+1.5
Overall Length+1-1
Shank Diameter-0.002-0.005

Choose the finish(2 options)

Compare →

Each finish is a different part number and price.

Not sure? Compare tool coatings — or leave it uncoated, the most common choice for aluminum.

Uncoated · your price$91.60

Part MNR-204-08

Made & shipped in the USA · lead time confirmed at order. Test this tool in your spindle at retail, or get it through your RobbJack distributor.

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

Adds MNR-204-08 · Uncoated · $91.60

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Download ISO 13399 data (.csv)

Proven in the field

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Uncoated

$91.60

MNR-204-08

Starting speeds & feeds for the MNR-204-08

Dial in for your machine →

RobbJack's tested starting numbers for this exact tool, from the same engine and the same default machine as the calculator: a 12,000 RPM / 400 IPM / 30 HP machining center, rigid setup, full-depth cut. A faster or smaller spindle changes the RPM and feed — enter yours in the calculator and it re-governs every number.

Starting speeds and feeds for RobbJack MNR-204-08
MaterialOperationSFMRPMFeed (IPM)Chip load / toothDOC (in)WOC (in)
6061(T4-T6) AluminumRoughing — full slot99012,000194.4.00810.3150.3150
6061(T4-T6) AluminumFinishing99012,00096.00400.3150.0157
Free-Cutting BrassRoughing — full slot7509,09672.8.00400.3150.3150
Free-Cutting BrassFinishing7509,09636.4.00200.3150.0157
AcetalRoughing — full slot99012,000194.4.00810.3150.3150
AcetalFinishing99012,00096.00400.3150.0157

Read before you run

Recommendations are computed starting points based on typical conditions — not guarantees of performance, tool life, or fitness for your application. Machining involves inherent risk: you are solely responsible for safe operation, for verifying every parameter against your machine, spindle, toolholding, workholding, and guarding limits, and for proving all parameters on a test cut before production. RobbJack Corporation assumes no liability for tool breakage, machine damage, scrapped parts, production loss, or personal injury arising from use of these recommendations. By using this calculator you accept RobbJack's Terms & Conditions.

More in the MNR-204 series

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