MSB-301-08
3 Flute Ball End Stub Length Metric Tuffy Grade Carbide End Mill
8mm Dia 3-Flute Metric End Mill 12mm LOC, 8mm Shank, 58mm OAL, 4mm CR
OrderingMSB-301-08·Uncoated·$90.35Change finish
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
- 8 mm
- Diameter ToleranceDC tol
- 0.000/-0.002
- Shank DiameterDMM
- 8 mm
- Length of Cut (LOC)APMX
- 12 mm
- Overall Length (OAL)OAL
- 58 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
- MSB-301 — 3 Flute Ball End Stub Length Metric Tuffy Grade Carbide End Mill
Cuts these materials
Applications
See it run
Tolerances
| Type | Min | Max |
|---|---|---|
| Cutting Diameter | 0 | -0.003 |
| Length of Cut | +0.03 | 0 |
| 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.
Part MSB-301-08
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.
Uncoated
$90.35
MSB-301-08
Starting speeds & feeds for the MSB-301-08
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.
| Material | Operation | SFM | RPM | Feed (IPM) | Chip load / tooth | DOC (in) | WOC (in) |
|---|---|---|---|---|---|---|---|
| 6061(T4-T6) Aluminum | Roughing — full slot | 990 | 12,000 | 291.6 | .00810 | .3150 | .3150 |
| 6061(T4-T6) Aluminum | Finishing | 990 | 12,000 | 144 | .00400 | .3150 | .0157 |
| Free-Cutting Brass | Roughing — full slot | 750 | 9,096 | 109.2 | .00400 | .3150 | .3150 |
| Free-Cutting Brass | Finishing | 750 | 9,096 | 54.6 | .00200 | .3150 | .0157 |
| Acetal | Roughing — full slot | 990 | 12,000 | 291.6 | .00810 | .3150 | .3150 |
| Acetal | Finishing | 990 | 12,000 | 144 | .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 MSB-301 series
Same series, different size — what changes from this tool is shown in red.
- MSB-301-01.5$38.55Ø 1.5 mmLOC 3 mmCR 0.75 mmOAL 38 mm
- MSB-301-02$37.30Ø 2 mmLOC 5 mmCR 1 mmOAL 38 mm
- MSB-301-03$37.30Ø 3 mmLOC 6 mmCR 1.5 mmOAL 38 mm
- MSB-301-04$49.90Ø 4 mmLOC 8 mmCR 2 mmOAL 50 mm
- MSB-301-05$71.45Ø 5 mmLOC 8 mmCR 2.5 mmOAL 50 mm
- MSB-301-06$84.00Ø 6 mmLOC 8 mmCR 3 mmOAL 50 mm
- MSB-301-10$111.25Ø 10 mmLOC 14 mmCR 5 mmOAL 66 mm
- MSB-301-12$290.25Ø 12 mmLOC 16 mmCR 6 mmOAL 73 mm
- MSB-301-16$325.55Ø 16 mmLOC 20 mmCR 8 mmOAL 82 mm
- MSB-301-20$377.95Ø 20 mmLOC 25 mmCR 10 mmOAL 92 mm
- MSB-201-02$37.30Ø 2 mm2 FLLOC 5 mmCR 1 mm
- MSB-201-03$37.30Ø 3 mm2 FLLOC 6 mmCR 1.5 mm