End MillRouterMade in USA

S1-401-08

Name: RobbJack S1-401-08 — 4 Flute Stub Length C-2 Grade Carbide End Mill
Brand: RobbJack
SKU: S1-401-08
Price: 35.30 USD
Availability: MadeToOrder

4 Flute Stub Length C-2 Grade Carbide End Mill

0.25-in Dia 4-Flute End Mill, 0.5-in LOC, 0.25-in Shank, 2-in OAL

Scaled drawing — true to this tool's dimensions (inch)

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RobbJack S1 stub length C-2 grade carbide end mill for aluminum, square end, 30 degree helix

2, 3 & 4 Flute C-2 Grade Carbide End Mills — stub length workhorses for aluminum and non-ferrous milling

C-2 grade carbide end mills in stub length — 2 flute (S1-201), 3 flute (S1-301), and 4 flute (S1-401), all square end with 30° helix
S1-201 inch sizes 1/16"–3/4" cutting diameter; metric MS1-201 2 flute in 2mm–20mm cutting diameters (38mm–92mm OAL)
Applications: slotting, side milling, helical interpolation — from high performance roughing through semi-finishing and finishing, run dry, wet, cold air, or spray mist
Materials: aluminum, copper, magnesium, plastics, composites, brass
Uncoated or Diamond-Like Carbon (DLC) coated — every size in the series is offered in a -DLC version
S1 tolerances: cutting dia. +.000/−.002 (1/16"–1/4") and +.000/−.003 (9/32"–3/4"); shank dia. −.0001/−.0002; flute length +.030/−.000 (1/16"–5/16") and +.060/−.000 (3/8"–3/4"); OAL ±.060
MS1 tolerances: cutting dia. +.000/−.075mm; shank dia. −.002/−.005mm; flute length +0.500/+1.500mm; OAL ±10mm
Available with wiper flats (guide p.17), coolant grooves (guide p.16), and 45° chamfer (guide p.17)
S1-301/S1-401 available with shank flats to eliminate slippage in the tool holder (guide p.18)

From the RobbJack Applications Guide.

**S1-301 — 3 Flute** — 3 flute C-2 grade stub length, 1/16" to 1/2" cutting diameters (1-1/2" to 3" OAL), uncoated or DLC coated.

**S1-401 — 4 Flute** — 4 flute C-2 grade stub length, 1/16" to 3/4" cutting diameters (1-1/2" to 4" OAL), uncoated or DLC coated.

**Dimensions** — Overall length, flute length, shank diameter, and cutter diameter as tabulated per size in the Applications Guide.

About this series

S1 C-2 Grade Carbide Stub Length End Mills

Stub-length C-2 carbide end mills in 2, 3, and 4 flute.

The S1 series is an inch-sized line of stub length C-2 grade solid carbide end mills offered in 2-flute (S1-201), 3-flute (S1-301), and 4-flute (S1-401) styles with a 30-degree helix and square end. Cutting diameters range from 1/16 inch up to 3/4 inch. Available with wiper flats, coolant grooves, and a 45-degree chamfer option; flats are available to eliminate slippage in the tool holder.