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End MillMade in USA

MTS-401-04

4 Flute Stub Length Metric Tuffy Grade Carbide End Mill

4mm Dia 4-Flute Metric End Mill 8mm LOC, 4mm Shank, 50mm OAL

OrderingMTS-401-04·Uncoated·$37.80Change finish

4 Flute Stub Length Metric Tuffy Grade Carbide End Mill — MTS-401-04
Series photo — representative of the MTS-401 family
OAL 50 mmFlute 8 mmShank Ø4 mmCutter Ø4 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 TS-201 2-flute stub length Tuffy grade carbide end mill

Stub-length Tuffy grade square end mills in 2, 3, and 4 flute — short, rigid general-purpose cutters offered in five coating options.

  • Square end stub-length Tuffy grade carbide in three flute counts: TS-201 (2 flute), TS-301 (3 flute), TS-401 (4 flute), all with 30° helix
  • Stub flute lengths for rigidity — e.g. 1/4" diameter carries only a 1/2" flute length on a 2" OAL
  • Inch sizes 1/16"–3/4" (2 and 4 flute; 3 flute runs 1/16"–1/2"); metric MTS-401 4 flute covers 2–20 mm
  • Five coating options across the line: Uncoated, TiN, TiCN, AlTiN, and Diamond-Like Carbon (DLC) — ordered by suffix (-T, -C, -A, -DLC)
  • 2 and 3 flute rated for slotting, side milling, and helical interpolation; 4 flute optimized for side milling
  • Broad material range: aluminum, copper, titanium, magnesium, cast iron, steel, brass (plus wood on 2/3 flute)
  • High-performance roughing, semi-finishing, and finishing — dry, wet, cold air, or spray mist
  • Tolerances: cutting dia +.000/−.002 (1/16"–1/4") and +.000/−.003 (5/16"–3/4"); shank −.0001/−.0002; MTS cutting dia +.000/−.075 mm

From the RobbJack Applications Guide.

TS-301 3-flute stub length Tuffy grade carbide end mill
TS-401 4-flute stub length Tuffy grade carbide end mill

About this series

MTS Metric Stub Length Tuffy Grade Carbide End Mills

Metric 4 flute stub-length square-end mills

MTS-401 is the metric, 4 flute, stub-length, square-end Tuffy Grade carbide end mill version of the TS series, with a 30 degree helix. Offered in 2 mm through 20 mm cutting diameters, uncoated or with TiN, TiCN, AlTiN and DLC coatings.

  • Metric sizes 2 mm to 20 mm
  • 4 flute square end, 30 degree helix
  • Uncoated or TiN, TiCN, AlTiN, and DLC coated

Aluminum, copper, titanium, magnesium, cast iron, steel, brass

Headline spec

Metric, stub length, 4 flute, 30 degree helix

Best for

  • Side milling
  • High performance roughing through finishing

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
4 mm
Diameter ToleranceDC tol
0.000/-0.075
Shank DiameterDMM
4 mm
Length of Cut (LOC)APMX
8 mm
Overall Length (OAL)OAL
50 mm
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
MTS-401 — 4 Flute Stub Length Metric Tuffy Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassTitaniumMagnesiumCast IronSteel

Applications

Side MillingHigh PerformanceRoughingSemi-FinishingFinishingDryWetCold AirSpray Mist

See it run

Tolerances

TypeMinMax
Cutting Diameter0-0.075
Length of Cut+0.5+1.5
Overall Length+1-1
Shank Diameter-0.002-0.005

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$37.80

Part MTS-401-04

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 MTS-401-04 · Uncoated · $37.80

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

Proven in the field

See the case studies →

Uncoated

$37.80

MTS-401-04

Starting speeds & feeds for the MTS-401-04

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 MTS-401-04
MaterialOperationSFMRPMFeed (IPM)Chip load / toothDOC (in)WOC (in)
6AL-4V TitaniumRoughing — full slot2305,57917.9.00080.0787.1575
6AL-4V TitaniumFinishing2305,5798.9.00040.1575.0039

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 MTS-401 series

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