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End MillRouterMade in USA

SR-2-055-BN

2 Flute Ball End Standard Length Tuffy Grade Miniature End Mill

0.055-in Dia 2-Flute End Mill, 0.165-in LOC, 0.125-in Shank, 1.5-in OAL, 0.0275-in CR

2 Flute Ball End Standard Length Tuffy Grade Miniature End Mill — SR-2-055-BN
Series photo — representative of the SR-2-BN family
OAL 1.5″Flute 0.165″Shank Ø0.125″Cutter Ø0.055″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 SR-2-060 two-flute standard-length Tuffy grade miniature carbide end mill

Standard-length miniature end mills — deeper reach in every .001-inch size from stock

  • Every .001-inch diameter from .005 to .062 is standard — all shipped from stock (SR-2 table runs .010–.062)
  • Hand-selected to any diameter to the nearest .0002-inch under .062
  • Standard flute lengths (3x diameter, e.g. SR-2-010 has a .0300-in flute) for deeper miniature slots and walls
  • 2 flute, 30-degree helix, square end; ball end (SR-2BN) and 4 flute (SR-4) versions available
  • Tuffy grade sub-micrograin carbide, rated for materials up to 40 HRc
  • Tight tolerances: cutting diameter +/-.0005-in, shank diameter -.0001/-.0002-in, flute length +.003/-.000-in
  • Uniform 1/8-in shank and 1-1/2-in overall length across the range (metric MSR: 3 mm shank, 38 mm OAL)
  • Coatings available: TiN (-T), TiCN (-C), AlTiN (-A) and DLC (-DLC)

From the RobbJack Applications Guide.

About this series

SR Tuffy Grade Miniature End Mills

Standard-length miniatures for added reach — any size, hand-selected.

RobbJack SR standard-length Tuffy Grade miniature end mills offer longer flute lengths than the stub-length SS for reaching deeper features, in EVERY .001" diameter from .010" to .062" as standard. Like all RobbJack miniatures, sizes in between are available hand-selected to any diameter to the nearest .0002" under .062". Ball-end (SR-2BN) and 4-flute (SR-4) variants are also available.

  • Every .001" diameter from .010" to .062" is standard
  • Hand-selected to ANY diameter in .0002" steps under .062"
  • 2 flute, square end, 30° helix, standard length for reach
  • Ball-end (SR-2BN) and 4-flute (SR-4) variants
  • Cutting dia. tolerance ±.0005"

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

Headline spec

Cutting diameters .010"–.062" in .001" increments; 1/8" shank; 1-1/2" OAL

Best for

  • Deeper micro features
  • Dental & medical
  • Electronics
  • Die/mold detail

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
0.055″
Diameter ToleranceDC tol
0.0005/-0.0005
Max Cutting DiameterDCX
0.0555″
Shank DiameterDMM
0.125″
Length of Cut (LOC)APMX
0.165″
Overall Length (OAL)OAL
1.5″
Corner RadiusRE
0.0275″
Number of FlutesNOF
2
Helix AngleFHA
30°
Helix HandFHH
Right-hand
Cut Direction
Right-hand cut
Shank Blend Angle
15°
End Type
Ball End
Center Cutting
Yes — plunges
Hand-Select
Available — any diameter to the nearest .0002"
Series
SR-2-BN — 2 Flute Ball End Standard Length Tuffy Grade Miniature End Mill

Cuts these materials

AluminumCopper & BrassTitaniumMagnesiumCast IronSteelStainless SteelSuperalloys (Inconel…)PlasticsCompositesHardened 30–40 HRcWood

Applications

SlottingSide MillingHelical InterpolationConventionalRampingHigh Performance3-DRoughingSemi-FinishingFinishingDryWetCold AirSpray MistMiniature

See it run

Tolerances

TypeMinMax
Cutting Diameter+0.0005-0.0005
Length of Cut+0.0030
Overall Length+0.06-0.06
Shank Diameter-0.0001-0.0002
Starting at$33.50

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) · $35.30 — our pick for your material. Choose another finish below.

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Proven in the field

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Finishes (5)

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Starting at

$33.50

Performance guaranteed

More in the SR-2-BN series

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