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End MillRouterMade in USA

SB-301-04

3 Flute Ball End Stub Length Tuffy Grade Carbide End Mill

0.125-in Dia 3-Flute End Mill, 0.25-in LOC, 0.125-in Shank, 1.5-in OAL, 0.0625-in CR

3 Flute Ball End Stub Length Tuffy Grade Carbide End Mill — SB-301-04
Series photo — representative of the SB-301 family
OAL 1.5″Flute 0.25″Shank Ø0.125″Cutter Ø0.125″Ball
Scaled drawing — true to this tool's dimensions (inch)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack SB Series Tuffy grade carbide ball end mill, stub length

2 and 3 flute Tuffy grade carbide ball end mills in stub length -- rigid short-flute ball tools for 3-D work from 1/16" to 3/4" inch and 1.5 mm to 20 mm metric.

  • Ball end, stub-length flutes for rigidity: SB-201 (2 flute) and SB-301 (3 flute), both 30-degree helix
  • Inch sizes from 1/16" to 3/4"; metric MSB-201 from 2 mm to 20 mm and MSB-301 from 1.5 mm to 20 mm
  • Applications: slotting, side milling, helical interpolation, conventional and ramping 3-D work, high performance, roughing, semi-finishing, and finishing
  • Materials: aluminum, copper, magnesium, cast iron, plastics, brass, and wood
  • New coatings available -- uncoated, TiN, TiCN, AlTiN, and DLC
  • Tolerances: cutting diameter +.000/-.002 (1/16" to 1/4") or +.000/-.003 (9/32" to 3/4"), shank diameter -.0001/-.0002, flute length +.030/-.000 (1/16" to 5/16") or +.060/-.000 (3/8" to 3/4"), OAL +/-.060; MSB cutting diameter +.000/-.075 mm

From the RobbJack Applications Guide.

About this series

SB / MSB Ball End Stub Length Tuffy Grade Carbide End Mills

2 and 3 flute ball-end mills for 3-D, die and mold work

The SB series is a ball-end, stub-length Tuffy Grade carbide end mill with a 30 degree helix, offered in 2 flute (SB-201) and 3 flute (SB-301) configurations. MSB is the metric equivalent. Available uncoated and with TiN, TiCN, AlTiN and DLC coatings.

  • Ball end, stub length, 30 degree helix
  • 2 and 3 flute configurations
  • Inch (SB) and metric (MSB) versions
  • Uncoated or TiN, TiCN, AlTiN, and DLC coated

Aluminum, copper, magnesium, cast iron, plastics, brass, wood

Headline spec

Ball end, stub length, 30 degree helix, 2/3 flute

Best for

  • 3-D machining
  • Slotting and side milling
  • Helical interpolation, conventional and ramping
  • High performance roughing through finishing

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
0.125″
Diameter ToleranceDC tol
0.0000/-0.0020
Max Cutting DiameterDCX
0.125″
Shank DiameterDMM
0.125″
Length of Cut (LOC)APMX
0.25″
Overall Length (OAL)OAL
1.5″
Corner RadiusRE
0.0625″
Number of FlutesNOF
3
Helix AngleFHA
30°
Helix HandFHH
Right-hand
Cut Direction
Right-hand cut
End Type
Ball End
Center Cutting
Yes — plunges
Series
SB-301 — 3 Flute Ball End Stub Length Tuffy Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassMagnesiumCast IronPlastics

Applications

SlottingSide MillingHelical InterpolationConventionalRampingHigh Performance3-DRoughingSemi-FinishingFinishing

See it run

Tolerances

TypeMinMax
Cutting Diameter0-0.002
Length of Cut+0.030
Overall Length+0.06-0.06
Shank Diameter-0.0001-0.0002
Starting at$33.30

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 Aluminum Titanium Nitride (AlTiN) · $35.10 — 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 (5)

Compare tool coatings →

Starting at

$33.30

Performance guaranteed

More in the SB-301 series

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