MB-333-20
3 Flute Ball End Standard Length Metric Tuffy Grade Carbide End Mill
20mm Dia 3-Flute Metric End Mill 38mm LOC, 20mm Shank, 104mm OAL, 10mm CR
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
- 20 mm
- Diameter ToleranceDC tol
- 0.000/-0.075
- Shank DiameterDMM
- 20 mm
- Length of Cut (LOC)APMX
- 38 mm
- Overall Length (OAL)OAL
- 104 mm
- Corner RadiusRE
- 10 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
Applications
See it run
Tolerances
| Type | Min | Max |
|---|---|---|
| Cutting Diameter | 0 | -0.075 |
| Length of Cut | +0.5 | +1.5 |
| Overall Length | +1 | -1 |
| Shank Diameter | -0.002 | -0.005 |
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) · $429.50 — our pick for your material. Choose another finish below.
Proven in the field
- $548,290saved per year drilling carbon-fiber aircraft
- $216,000saved per year trimming aircraft skins
- 1,000%metal-removal increase in Inconel 718 (SPS)
Finishes (5)
Uncoated
MB-333-20
$411.60
Available to order
MB-333-20-A
$429.50
Available to order
MB-333-20-C
$427.55
Available to order
MB-333-20-T
$423.45
Available to order
MB-333-20-DLC
$452.80
Available to order
Starting at
$411.60
Performance guaranteed
More in the MB-333 series
Same series, different size — what changes from this tool is shown in red.
- MB-333-01.5$34.65Ø 1.5 mmLOC 6 mmCR 0.75 mmOAL 38 mm
- MB-333-02$35.60Ø 2 mmLOC 8 mmCR 1 mmOAL 38 mm
- MB-333-03$33.60Ø 3 mmLOC 12 mmCR 1.5 mmOAL 38 mm
- MB-333-04$50.60Ø 4 mmLOC 12 mmCR 2 mmOAL 50 mm
- MB-333-05$73.90Ø 5 mmLOC 14 mmCR 2.5 mmOAL 50 mm
- MB-333-06$78.30Ø 6 mmLOC 14 mmCR 3 mmOAL 57 mm
- MB-333-08$82.55Ø 8 mmLOC 16 mmCR 4 mmOAL 63 mm
- MB-333-10$106.05Ø 10 mmLOC 20 mmCR 5 mmOAL 72 mm
- MB-333-12$157.70Ø 12 mmLOC 25 mmCR 6 mmOAL 83 mm
- MB-333-16$285.75Ø 16 mmLOC 32 mmCR 8 mmOAL 92 mm
- MB-203-02$35.60Ø 2 mm2 FLLOC 8 mmCR 1 mm
- MB-203-03$33.60Ø 3 mm2 FLLOC 12 mmCR 1.5 mm