EX-204-08
2 Flute Extra Length Tuffy Grade Carbide End Mill
0.25-in Dia 2-Flute End Mill, 0.625-in LOC, 0.25-in Shank, 3-in OAL, 2-in Reach
2 flute Tuffy grade carbide end mills in extra length and extra-length extended reach -- necked designs with up to 4 inches of reach for deep non-ferrous work.
- Necked square-end design with 30-degree helix -- the reach dimension is called out separately from flute length
- EX-204 (2 flute extra length): 1/8" to 1/2" diameters with 2" to 2-1/2" reach and 3" to 4" overall length
- EX-206 (2 flute extra length extended reach): 1/2" to 1" diameters, all with 4" reach and 6" overall length
- Shank flats on the 3/8" and 1/2" EX-204 sizes; other sizes come without flats, and NF versions are listed for the flat sizes
- Applications: slotting, side milling, helical interpolation, roughing, semi-finishing, and finishing; run wet, cold air, or spray mist
- Materials: aluminum, copper, magnesium, plastics, brass, and wood
- Tolerances: cutting diameter -.001/-.002 at 1/8" and +.001/-.000 from 3/16" to 1", shank diameter -.0001/-.0002, flute length +.060/-.000, OAL +/-.060
- Have chatter? The guide points to RobbJack's FM Series (guide page 16)
From the RobbJack Applications Guide.
About this series
EX Extra Length Tuffy Grade Carbide End Mills
2 flute extended-reach, necked square-end mills
The EX series is a 2 flute, extra-length, square-end Tuffy Grade carbide end mill with a 30 degree helix and necked design. EX-204 is the extra-length version and EX-206 is the extra-length extended-reach version, with reach up to 4" and overall lengths up to 6". Tools are available with or without flats (add 'NF').
- 2 flute square end, 30 degree helix, necked
- Extended reach (EX-206 reaches 4" with 6" OAL)
- Available with or without flats
Aluminum, copper, magnesium, plastics, brass, wood
Headline spec
Extra length, necked, 2 flute, 30 degree helix
Best for
- Slotting and side milling
- Helical interpolation
- Roughing through finishing
Specifications
US machining terms with ISO 13399 codes.
- Cutting DiameterDC
- 0.25″
- Diameter ToleranceDC tol
- 0.0010/0.0000
- Max Cutting DiameterDCX
- 0.251″
- Shank DiameterDMM
- 0.25″
- Length of Cut (LOC)APMX
- 0.625″
- Reach (LBS)SDL
- 2″
- Neck DiameterND
- 0.2375″
- Overall Length (OAL)OAL
- 3″
- Number of FlutesNOF
- 2
- Helix AngleFHA
- 30°
- Helix HandFHH
- Right-hand
- Cut Direction
- Right-hand cut
- Blend Angle (neck→shank)
- 15°
- Feather Blend
- 10°
- End Type
- Square End
- Center Cutting
- Yes — plunges
- Series
- EX-204 — 2 Flute Extra Length Tuffy Grade Carbide End Mill
Cuts these materials
Applications
Features
See it run
Tolerances
| Type | Min | Max |
|---|---|---|
| Cutting Diameter | +0.001 | 0 |
| Length of Cut | +0.06 | 0 |
| Overall Length | +0.06 | -0.06 |
| Shank Diameter | -0.0001 | -0.0002 |
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 Uncoated · $115.10 — 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 (1)
Uncoated
EX-204-08
$115.10
Available to order
Starting at
$115.10
Performance guaranteed
More in the EX-204 series
Same series, different size — what changes from this tool is shown in red.
- EX-204-04$99.35Ø 0.125″LOC 0.375″2 FLreach 2″
- EX-204-06$101.70Ø 0.1875″LOC 0.5″2 FLreach 2″
- EX-204-10$188.95Ø 0.3125″LOC 0.75″reach 2.125″2 FL
- EX-204-12$180.65Ø 0.375″LOC 0.75″OAL 3.5″2 FL
- EX-204-14$209.85Ø 0.4375″LOC 0.75″reach 2.25″OAL 3.75″
- EX-204-16$227.95Ø 0.5″LOC 1″reach 2.5″OAL 4″
- EX-206-16$442.65Ø 0.5″LOC 1″reach 4″OAL 6″
- EX-206-20$414.30Ø 0.625″LOC 1.375″reach 4″OAL 6″
- EX-206-24$808.95Ø 0.75″LOC 1.625″reach 4″OAL 6″
- EX-206-32$751.85Ø 1″LOC 2″reach 4″OAL 6″