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End MillRouterMade in USA

HB-401-08

2+2 Flute Short Tip Compression Herringbone Router for Wood

0.25-in Dia 2-Flute End Mill, 0.75-in LOC, 0.25-in Shank, 2.5-in OAL

2+2 Flute Short Tip Compression Herringbone Router for Wood — HB-401-08
Series photo — representative of the HB-401 family
OAL 2.5″Flute 0.75″Shank Ø0.25″Cutter Ø0.25″Square
Scaled drawing — true to this tool's dimensions (inch)
Speeds & FeedsDialed to this exact tool — free
Free CAD & DataSTEP 3DDXF 2DISO CSVCAM library
RobbJack HB-402 herringbone compression router showing opposed up-shear and down-shear flute sections

2+2 flute herringbone compression routers — up-shear tip meets down-shear body so both faces of the panel stay clean.

  • 2+2 flute herringbone (compression) geometry: two up-shear flutes at the tip, two down-shear flutes above, meeting in the middle of the panel
  • HB-401 short-tip: upshear lengths of just 3/16"-3/8" for thin materials, sizes 1/4"-3/4"
  • HB-402 compression: upshear lengths 1/2"-3/4" for standard panel stock, sizes 1/4"-3/4"
  • HB-404 long-length: 1/2" dia with 1-5/16" flute, 3/4" upshear, 3-1/2" OAL
  • 30° helix, square end with chamfer option
  • DLC (Diamond-Like Carbon) coating available
  • Materials: wood, aluminum, copper, magnesium, brass
  • Tolerances: cutting dia +.000/-.002 (to 1/4") and +.000/-.003 (9/32"-3/4"), OAL +/-.060

From the RobbJack Applications Guide.

About this series

HB Herringbone Compression Routers

2+2 flute herringbone routers for clean edges on both faces

The HB series is a 2+2 flute compression herringbone router with a square end, 30 degree helix, for wood and plastics. HB-401 is the short-tip version, HB-402 is the standard compression version (short upshear length for thin materials), and HB-404 is the long-length compression version. Offered uncoated with optional DLC coating.

  • 2+2 flute compression herringbone design
  • Square end, 30 degree helix
  • HB-402 short upshear length suited to thin materials
  • DLC coating available

Wood, aluminum, copper, magnesium, brass

Headline spec

2+2 flute compression, 30 degree helix

Best for

  • Slotting and side milling
  • Helical interpolation and ramping
  • Roughing and semi-finishing

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 HandFHH
Right-hand
Cut Direction
Right-hand cut
End Type
Square End
Center Cutting
Yes — plunges
Shear Direction
Compression (up + down)
Series
HB-401 — 2+2 Flute Short Tip Compression Herringbone Router for Wood

Cuts these materials

Wood

Applications

ConventionalHigh PerformanceFinishingDry

See it run

Tolerances

TypeMinMax
Cutting Diameter0-0.002
Overall Length+0.06+0.06
Shank Diameter-0.0001-0.0002
Starting at$90.05

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 Diamond-Like Carbon (DLC) · $103.35 — our pick for your material. Choose another finish below.

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Download ISO 13399 data (.csv)

Proven in the field

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Finishes (2)

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Starting at

$90.05

Performance guaranteed

More in the HB-401 series

Same series, different size — what changes from this tool is shown in red.