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End MillMade in USA

T6-402-03

4 Flute Standard Length Tuffy Grade Carbide End Mill

0.09375-in Dia 4-Flute End Mill, 0.375-in LOC, 0.1875-in Shank, 2.5-in OAL

OrderingT6-402-03·Uncoated·$92.70Change finish

4 Flute Standard Length Tuffy Grade Carbide End Mill — T6-402-03
Series photo — representative of the T6-402 family
OAL 2.5″Flute 0.375″Shank Ø0.1875″Cutter Ø0.0938″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 T6 Series double-ended Tuffy grade carbide end mill on a 3/16 inch shank

2 and 4 flute double-ended Tuffy grade carbide end mills -- every size on a 3/16" shank for strength, with tight plus/minus diameter tolerance and cutting diameters from 1/16" to 3/16" in 64th increments.

  • Double-ended carbide end mills on 3/16" shanks -- two cutting ends per tool, with all sizes on 3/16" shanks for strength
  • Four sub-series: T6-200 (2 flute stub), T6-202 (2 flute standard), T6-400 (4 flute stub), T6-402 (4 flute standard), all Tuffy grade with square end and 30-degree helix
  • Cutting diameters from 1/16" to 3/16" in 64th-inch increments (02 through 06, including half sizes)
  • Tight plus/minus tolerances: cutting diameter +/-.0005, shank diameter -.0001/-.0002, flute length +.030/-.000, OAL +/-.060
  • The 3/16" cutting diameter size is single end only, to allow the plus/minus tolerance
  • Available uncoated or in TiN, TiCN, AlTiN, and DLC coatings
  • 2 flute versions cover slotting, side milling, helical interpolation, ramping, roughing, semi-finishing, and finishing; 4 flute versions are for side milling, semi-finishing, and finishing
  • Materials: aluminum, copper, titanium, magnesium, cast iron, steel, stainless steel, brass, and wood; run dry, wet, cold air, or spray mist

From the RobbJack Applications Guide.

About this series

T6 Tuffy Grade Carbide End Mills

Double-ended carbide end mills on strong 3/16" shanks

The T6 is a double-ended, square-end Tuffy Grade carbide end mill available in 2-flute (T6-200 stub, T6-202 standard) and 4-flute (T6-400 stub, T6-402 standard) configurations. All sizes are built on 3/16" shanks for strength. Cutting diameters run from 1/16" to 3/16"; the 3/16" size is single-ended only to allow plus/minus tolerance.

  • 2 and 4 flute, square end
  • 30 degree helix
  • Double ended
  • All sizes on 3/16" shanks for strength
  • Tight tolerances
  • Cutting Dia. tolerance +/-.0005"

Available uncoated and in TiN, TiCN, AlTiN, and Diamond-Like Carbon (DLC) coatings

Headline spec

Cutting diameters 1/16"-3/16"; 3/16" shank; 2-1/2" OAL (2" on single-ended 3/16")

Best for

  • Slotting
  • Side milling
  • Helical interpolation
  • Ramping
  • Roughing
  • Semi-finishing
  • Finishing
  • Aluminum, copper, titanium, magnesium, cast iron, steel, stainless steel, brass and wood

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
0.0938″
Diameter ToleranceDC tol
0.0005/-0.0005
Max Cutting DiameterDCX
0.0943″
Shank DiameterDMM
0.1875″
Length of Cut (LOC)APMX
0.375″
Overall Length (OAL)OAL
2.5″
Number of FlutesNOF
4
Helix AngleFHA
30°
Helix HandFHH
Right-hand
Cut Direction
Right-hand cut
Shank Blend Angle
15°
End Type
Square End
Center Cutting
Yes — plunges
Series
T6-402 — 4 Flute Standard Length Tuffy Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassTitaniumMagnesiumCast IronSteelStainless Steel

Applications

Side MillingSemi-FinishingFinishingDryWetCold AirSpray Mist

See it run

Tolerances

TypeMinMax
Cutting Diameter+0.0005-0.0005
Length of Cut+0.030
Overall Length+0.06-0.06
Shank Diameter-0.0001-0.0002

Choose the finish(5 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$92.70

Part T6-402-03

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 T6-402-03 · Uncoated · $92.70

Calculate Speeds & Feeds
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Download ISO 13399 data (.csv)

Proven in the field

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Uncoated

$92.70

T6-402-03

Starting speeds & feeds for the T6-402-03

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 T6-402-03
MaterialOperationSFMRPMFeed (IPM)Chip load / toothDOC (in)WOC (in)
6AL-4V TitaniumRoughing — full slot2309,36718.7.00050.0469.0938
6AL-4V TitaniumFinishing2309,3677.5.00020.0938.0023
Gray IronRoughing — full slot29512,00057.6.00120.0469.0938
Gray IronFinishing29512,00028.8.00060.0938.0023
4140 SteelRoughing — full slot2208,95910.8.00030.0469.0938
4140 SteelFinishing2208,9597.2.00020.0938.0023

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 T6-402 series

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