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End MillRouterMade in USA

HB-404-16

2+2 Flute Long Length Compression Herringbone Router for Wood

0.5-in Dia 2-Flute End Mill, 1.3125-in LOC, 0.5-in Shank, 3.5-in OAL

OrderingHB-404-16·$251.25

2+2 Flute Long Length Compression Herringbone Router for Wood — HB-404-16
Series photo — representative of the HB-404 family
OAL 3.5″Flute 1.3125″Shank Ø0.5″Cutter Ø0.5″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
0.5″
Diameter ToleranceDC tol
0.0000/-0.0020
Max Cutting DiameterDCX
0.5″
Shank DiameterDMM
0.5″
Length of Cut (LOC)APMX
1.3125″
Overall Length (OAL)OAL
3.5″
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-404 — 2+2 Flute Long Length Compression Herringbone Router for Wood

Cuts these materials

Wood

Applications

ConventionalHigh-SpeedFinishingDry

See it run

Tolerances

TypeMinMax
Cutting Diameter0-0.003
Length of Cut+0.060
Overall Length+0.06-0.06
Shank Diameter-0.0001-0.0002
HB-404-16In stock$251.25
Uncoated · your price$251.25

Part HB-404-16

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.

Adds HB-404-16 · · $251.25

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Download ISO 13399 data (.csv)

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Starting at

$251.25

HB-404-16

Starting speeds & feeds for the HB-404-16

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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.

Starting speeds and feeds for RobbJack HB-404-16
MaterialOperationSFMRPMFeed (IPM)Chip load / toothDOC (in)WOC (in)
HardwoodsFinishing1,57212,000153.6.00640.5000.0250

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 HB-404 series

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