NR-204-06
2 Flute Standard Length C-2 Grade Carbide End Mill
0.1875-in Dia 2-Flute End Mill, 0.625-in LOC, 0.1875-in Shank, 2-in OAL
OrderingNR-204-06·Uncoated·$44.15Change finish
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
NR-204 C-2 Grade Carbide End Mills
C-2 grade end mills available with or without flats
The NR is a square-end C-2 Grade carbide end mill offered in 2-flute (NR-204), 3-flute (NR-303) and 4-flute (NR-404) standard-length configurations. It comes in 64th sizes and is available both with flats and without flats (NF). Cutting diameters range from 1/16" to 1".
- 2, 3 and 4 flute, square end
- 30 degree helix
- Available with flats or no flats (NF)
- Comes in 64th sizes
- Cutting Dia. tolerance +.001/-.000
Available uncoated and in Diamond-Like Carbon (DLC) coating
Headline spec
Cutting diameters 1/16"-1"; shanks 1/8"-1"; 1-1/2" to 4" OAL
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
- 0.1875″
- Diameter ToleranceDC tol
- 0.0010/0.0000
- Max Cutting DiameterDCX
- 0.1885″
- Shank DiameterDMM
- 0.1875″
- Length of Cut (LOC)APMX
- 0.625″
- Overall Length (OAL)OAL
- 2″
- 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
- NR-204 — 2 Flute Standard Length C-2 Grade Carbide End Mill
Cuts these materials
Applications
See it run
Tolerances
| Type | Min | Max |
|---|---|---|
| Cutting Diameter | +0.001 | 0 |
| Length of Cut | +0.03 | 0 |
| Overall Length | +0.06 | -0.06 |
| Shank Diameter | -0.0001 | -0.0002 |
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.
Part NR-204-06
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.
Uncoated
$44.15
NR-204-06
Starting speeds & feeds for the NR-204-06
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.
| Material | Operation | SFM | RPM | Feed (IPM) | Chip load / tooth | DOC (in) | WOC (in) |
|---|---|---|---|---|---|---|---|
| 6061(T4-T6) Aluminum | Roughing — full slot | 590 | 12,000 | 115.2 | .00480 | .1875 | .1875 |
| 6061(T4-T6) Aluminum | Finishing | 590 | 12,000 | 57.6 | .00240 | .1875 | .0094 |
| Free-Cutting Brass | Roughing — full slot | 590 | 12,000 | 57.6 | .00240 | .1875 | .1875 |
| Free-Cutting Brass | Finishing | 590 | 12,000 | 28.8 | .00120 | .1875 | .0094 |
| Acetal | Roughing — full slot | 590 | 12,000 | 115.2 | .00480 | .1875 | .1875 |
| Acetal | Finishing | 590 | 12,000 | 57.6 | .00240 | .1875 | .0094 |
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 NR-204 series
Same series, different size — what changes from this tool is shown in red.
- NR-204-02$31.90Ø 0.0625″LOC 0.1875″OAL 1.5″2 FL
- NR-204-02.5$32.70Ø 0.0781″LOC 0.25″OAL 1.5″2 FL
- NR-204-03$31.90Ø 0.0937″LOC 0.375″OAL 1.5″2 FL
- NR-204-03.5$32.70Ø 0.1094″LOC 0.4375″OAL 1.5″2 FL
- NR-204-04$29.85Ø 0.125″LOC 0.5″OAL 1.5″2 FL
- NR-204-04.5$44.85Ø 0.1406″LOC 0.5″2 FLOAL 2″
- NR-204-05$44.30Ø 0.1562″LOC 0.5625″2 FLOAL 2″
- NR-204-05.5$50.00Ø 0.1719″2 FLLOC 0.625″OAL 2″
- NR-204-06.5$70.80Ø 0.2031″OAL 2.5″2 FLLOC 0.625″
- NR-204-07$71.50Ø 0.2188″OAL 2.5″2 FLLOC 0.625″
- NR-204-07.5$72.50Ø 0.2344″OAL 2.5″2 FLLOC 0.625″
- NR-204-08$72.50Ø 0.25″LOC 0.75″OAL 2.5″2 FL