WU1-203-08
2 Flute Standard Length Solid Carbide Up Shear Router
0.25-in Dia 2-Flute End Mill, 0.75-in LOC, 0.25-in Shank, 2.5-in OAL
OrderingWU1-203-08·Uncoated·$66.75Change finish
2 Flute Solid Carbide Upshear Spiral Router — W Precision Spiral Routers for CNC Production
- 2 flute solid carbide upshear (up-cut) spiral router — flutes pull chips UP and out of the cut for maximum chip evacuation in deep slots and pockets
- 30° helix, square end with corner chamfer
- WU1-201 stub length (3/16"–3/4" dia., 2"–4" OAL) and WU1-203 standard length (1/8"–3/4" dia., 1-1/2"–5-1/4" OAL, plus 16mm metric: 16mm dia. × 55mm flute × 118mm OAL)
- Cutting dia. tolerance +.000/−.002 (1/16"–1/4") and +.000/−.003 (9/32"–3/4"); shank dia. −.0001/−.0002; OAL ±.060
- Applications: slotting, side milling, helical interpolation, ramping, roughing, semi-finishing — run dry, wet, cold air, or spray mist
- Materials: wood, aluminum, copper, magnesium, brass, plastics
- Diamond-Like Carbon (DLC) coating available
- Guitar building: the WU1 Series is RobbJack's pick for bodies and shaping, neck and carving (Applications Guide p.194)
- WU1-310 variant: 3 flute, 10° helix, standard length upshear router for aluminum aircraft skins (1/2"–3/4" dia., p.71) — mirror edge, chatter reduction
From the RobbJack Applications Guide.
About this series
WU1 Solid Carbide Upshear Routers
2 flute upshear spiral routers for wood, plastics and aluminum aircraft skins
The WU1 series is a 2 flute solid carbide upshear spiral router with a square end and 30 degree helix, offered in stub (WU1-201) and standard (WU1-203) lengths for wood and plastics CNC production. A 3 flute standard-length 10 degree helix version (WU1-310) is offered for routing aluminum aircraft skins, available with Mirror Edge for chatter reduction. DLC coating available.
- 2 flute upshear, square end, 30 degree helix
- Stub and standard lengths
- WU1-310 3 flute, 10 degree helix version for aluminum aircraft skins
- DLC coating available; Mirror Edge option for aircraft-skin version
Wood, aluminum, copper, magnesium, brass, plastics
Headline spec
Upshear, 2 flute, 30 degree helix
Best for
- Slotting and side milling
- Helical interpolation and ramping
- Roughing and semi-finishing
- Routing aluminum aircraft skins (WU1-310)
Specifications
US machining terms with ISO 13399 codes.
- Cutting DiameterDC
- 0.25″
- Diameter ToleranceDC tol
- 0.0000/-0.0020
- Max Cutting DiameterDCX
- 0.25″
- Shank DiameterDMM
- 0.25″
- Length of Cut (LOC)APMX
- 0.75″
- Overall Length (OAL)OAL
- 2.5″
- Number of FlutesNOF
- 2
- Helix AngleFHA
- 30°
- Helix HandFHH
- Right-hand
- Cut Direction
- Right-hand cut
- End Type
- Square End
- Center Cutting
- Yes — plunges
- Shear Direction
- Up-shear
- Series
- WU1-203 — 2 Flute Standard Length Solid Carbide Up Shear Router
Cuts these materials
Applications
See it run
Tolerances
| Type | Min | Max |
|---|---|---|
| Cutting Diameter | 0 | -0.002 |
| Length of Cut | +0.03 | 0 |
| Overall Length | +0.06 | -0.06 |
| Shank Diameter | -0.0001 | -0.0002 |
Choose the finish(2 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 WU1-203-08
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
$66.75
WU1-203-08
Starting speeds & feeds for the WU1-203-08
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) |
|---|---|---|---|---|---|---|---|
| Hardwoods | Roughing — full slot | 786 | 12,000 | 153.6 | .00640 | .2500 | .2500 |
| Hardwoods | Finishing | 786 | 12,000 | 76.8 | .00320 | .2500 | .0125 |
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 WU1-203 series
Same series, different size — what changes from this tool is shown in red.
- WU1-203-04$26.00Ø 0.125″LOC 0.47″OAL 1.5″2 FL
- WU1-203-06$41.25Ø 0.1875″LOC 0.595″OAL 2″2 FL
- WU1-203-12$207.40Ø 0.375″LOC 1″2 FLOAL 2.5″
- WU1-203-16$207.40Ø 0.5″LOC 1.5″OAL 3.5″2 FL
- WU1-203-20$333.40Ø 0.625″LOC 2″OAL 4.625″2 FL
- WU1-203-24$520.05Ø 0.75″LOC 2.1875″OAL 5.25″2 FL
- WU1-201-06$36.70Ø 0.1875″LOC 0.345″OAL 2″2 FL
- WU1-201-08$36.70LOC 0.47″OAL 2″Ø 0.25″2 FL
- WU1-201-12$207.40Ø 0.375″LOC 0.625″OAL 2″2 FL
- WU1-201-16$179.40Ø 0.5″LOC 1.25″OAL 3.25″2 FL
- WU1-201-20$262.35Ø 0.625″LOC 1.5″OAL 3.5″2 FL
- WU1-201-24$426.40Ø 0.75″LOC 1.5″OAL 4″2 FL