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End MillMade in USA

MB-333-08

3 Flute Ball End Standard Length Metric Tuffy Grade Carbide End Mill

8mm Dia 3-Flute Metric End Mill 16mm LOC, 8mm Shank, 63mm OAL, 4mm CR

OrderingMB-333-08·Uncoated·$94.45Change finish

3 Flute Ball End Standard Length Metric Tuffy Grade Carbide End Mill — MB-333-08
Series photo — representative of the MB-333 family
OAL 63 mmFlute 16 mmShank Ø8 mmCutter Ø8 mmBall
Scaled drawing — true to this tool's dimensions (mm)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack B-203-12 two-flute Tuffy grade carbide ball end mill, 3/8-inch diameter

Tuffy grade carbide ball end mills — 2, 3 and 4 flute, from 1/16-inch to 3/4-inch

  • B-203 2 flute ball end, standard length: fourteen inch sizes from 1/16-in to 3/4-in on 1-1/2-in to 4-in OALs
  • MB-203 metric line: 2 mm to 20 mm ball diameters, 38–104 mm overall lengths
  • B-300 3 flute ball end stub length and B-330 3 flute standard length: 1/8-in to 3/4-in, listed in the Steel & Hi-Temp Alloys section
  • B-440 4 flute ball end standard length with 40-degree helix (also MB-440 metric) for hardened-material finishing
  • Tuffy sub-micrograin carbide grade across the family
  • Coatings available on every size: TiN (-T), TiCN (-C), AlTiN (-A) and DLC (-DLC)

From the RobbJack Applications Guide.

About this series

MB Metric Tuffy Grade Carbide Ball End Mills

Metric honed-edge ball end mills for 3-D work

MB is the metric variant of the B Series: Tuffy Grade carbide ball end mills with T-Process honed edge. Available as MB-440 (4 flute, 40 degree helix standard length), uncoated or TiN, TiCN, AlTiN coated, in 3-20 mm sizes.

  • 4 flute ball end (MB-440), 40 degree helix
  • T-Process honed edge
  • Available uncoated or TiN, TiCN, AlTiN coated
  • Metric sizes 3 mm to 20 mm

Cast iron, steel, stainless steel and super alloys. Slotting, side milling, helical interpolation, ramping, 3-D, roughing and finishing.

Headline spec

Metric Tuffy Grade carbide ball end mill with T-Process honed edge

Best for

  • Metric 3-D and die/mold machining
  • Steel, stainless and super alloys

Specifications

US machining terms with ISO 13399 codes.

Cutting DiameterDC
8 mm
Diameter ToleranceDC tol
0.000/-0.075
Shank DiameterDMM
8 mm
Length of Cut (LOC)APMX
16 mm
Overall Length (OAL)OAL
63 mm
Corner RadiusRE
4 mm
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
MB-333 — 3 Flute Ball End Standard Length Metric Tuffy Grade Carbide End Mill

Cuts these materials

AluminumCopper & BrassMagnesiumCast IronPlasticsWood

Applications

SlottingSide MillingHelical InterpolationConventionalRampingHigh Performance3-DRoughingSemi-FinishingFinishingMiniature

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$94.45

Part MB-333-08

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 MB-333-08 · Uncoated · $94.45

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

Proven in the field

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Uncoated

$94.45

MB-333-08

Starting speeds & feeds for the MB-333-08

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 MB-333-08
MaterialOperationSFMRPMFeed (IPM)Chip load / toothDOC (in)WOC (in)
6061(T4-T6) AluminumRoughing — full slot99012,000291.6.00810.3150.3150
6061(T4-T6) AluminumFinishing99012,000144.00400.3150.0157
Free-Cutting BrassRoughing — full slot7509,096109.2.00400.3150.3150
Free-Cutting BrassFinishing7509,09654.6.00200.3150.0157
AcetalRoughing — full slot99012,000291.6.00810.3150.3150
AcetalFinishing99012,000144.00400.3150.0157

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 MB-333 series

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