Duhadaway Tool
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02 · Carbide end mills supplier

Carbide end mills picked by the metal you cut, and inserts matched to the body you already own.

Solid carbide end mills and indexable milling inserts for CNC shops across the United States. End mills are priced per piece with box pricing on 5 or more; inserts per box of 10. All quoted on inquiry, typical lead 1 to 5 business days. No regrinds sold as new.

Typ. 1–5 business days TiAlN · AlCrN · ZrN · Uncoated
Send an inquiry (302) 366-0113
A carbide end mill slotting aluminium under flood coolant with chips flying
Full slot in 6061, three flutes, flood coolant. Chips leave curled and bright, not welded.
Item 01 / 02
Solid carbide end mills with different flute counts and coatings on a bench
Gold is TiN-family, dark grey is AlTiN. The coating tells you what it was built to cut.

Solid carbide · h6 shank

Solid carbide end mills

Aluminium wants room for chips. That means 3 flutes, a polished flute face and either no coating or ZrN, because aluminium sticks to titanium-based coatings and welds itself to the edge. Steel wants the opposite: 4 or 5 flutes for a stronger core and more edges sharing the load, and an AlTiN or TiAlN coating that forms an oxide layer as it heats. Stainless and titanium go to AlCrN or a high-aluminium AlTiN with a variable helix to kill chatter.

Tell us the material, the diameter and the length of cut you need, and whether you are slotting or side milling at a light radial step. Those four facts pick the tool. We supply from 1/16 in to 1 in and metric equivalents. Every box says whether the tool is new or reground. We will sell a regrind if you ask for one, at a regrind price, marked as a regrind. We will never slip one in as new, because its diameter is smaller and your offsets need to know.

Aluminium
3-flute, uncoated or ZrN, 35–45° helix
Mild and alloy steel
4 or 5-flute, AlTiN / TiAlN
Stainless, titanium
4 or 5-flute variable helix, AlCrN
Sizes
1/16–1 in, 1–25 mm; stub, standard, long reach
Shank
h6 plain, Weldon flat on request

Price basisPer piece, box pricing on 5 or more, quoted on inquiry

Typical lead 1–5 business days

Coatings by material

The coating is chosen by what you cut.

Wrong coating on the right geometry fails early, usually by built-up edge in aluminium or by crater wear in steel.

End mill coating and flute choice, starting points
MaterialCoatingFlutesTypical SFMFailure we see most
6061 aluminiumUncoated or ZrN3800+Chips welded in the flute from a coated tool
1018 mild steelTiAlN4350Edge chipping from runout, not the tool
4140 pre-hardAlTiN4–5250Crater wear from running too slow and dry
304 stainlessAlCrN4–5200Work hardening from rubbing at low chip load
Gray cast ironTiAlN or TiCN4300Abrasive flank wear
Ti-6Al-4VAlCrN5+120Heat. Always heat.

SFM figures match the defaults in the cut-load calculator. They are starting points; the maker's chart for the exact tool wins.

Item 02 / 02
A carbide insert being screwed into a face mill body
Clean the pocket before you seat a new edge. A chip under an insert breaks it.

ISO 1832 · box of 10

Indexable milling inserts

Indexable milling inserts get matched by the full ISO code and the grade, to the cutter body already on your spindle. Not by shape. A square insert that is 0.2 mm thicker will seat, clamp and then sit proud of every other edge in the body, and it takes the whole load until it breaks.

Read the code off the old box. If the box is gone, the body usually carries the insert family on its side, and the pocket gives us shape, size and thickness. Grade is the half people skip. A P-grade for steel in a stainless job runs, but it runs a third of the edge life. Tell us the material and we match grade and chip breaker to it. Inserts come in boxes of 10; mixed grades in one box are not something we do.

Match by
Full ISO code, grade, chip breaker
Shapes
S, R, O, A, T; face, shoulder and high-feed bodies
Grades
ISO P, M, K, N, S, H application groups
Screws
Clamp screws and Torx drivers matched to body

Price basisPer box of 10, quoted on inquiry

Typical lead 1–5 business days

ISO insert code decoded

SEKT 1204 AFTN, one character at a time.

Each position means one thing. Get the first six right and it fits the pocket. Get the grade right and it lasts.

SShape: square, 90°
EClearance angle: 20°
KTolerance class on thickness and inscribed circle
TType: single-sided, screw hole with countersink
12Cutting edge length: 12 mm
04Thickness: 4.76 mm
AFCorner / wiper facet geometry
TNEdge prep and cutting direction

After the code comes the maker's grade, for example a P25 carbide with PVD coating. Two makers' inserts with the same ISO code will fit the same pocket. They will not always cut the same.

How an order runs

Tell us the material. The tool follows.

  1. Send material, diameter, length of cut and operation, or the insert code off the old box.
  2. We reply the same working day where we can, with part number, coating or grade, typical lead time and price basis.
  3. You confirm quantity. Five or more end mills of one size moves you to box pricing.
  4. It ships. Typical lead 1 to 5 business days for standard sizes; long reach and odd grades take longer and the reply says so.

Straight answers

Before you order cutters.

My end mills keep chipping. Is it the tool?

Usually it is runout. Check the holder and collet with an indicator first. On a 1/4 in carbide tool, 0.001 in of runout puts nearly all the load on one flute. See toolholding for collets with a stated class.

Will a bigger cutter stall my machine?

Maybe. Put the numbers into the spindle horsepower calculator before you buy a 3 in face mill for a 10 hp machine. It gives the required horsepower from your depth, width and feed.

Who should not buy cutters here?

Anyone needing special form tools ground to a print. That is a grinding shop's work and we will tell you so. Also anyone buying hundreds of one catalogue number at the lowest possible price per piece; go direct to the maker on volume.

Cutting tools inquiry

Material, diameter, operation. That is enough to start.

Also in the catalogue: soft jaws and clamp kits and all sixteen lines.

Send an inquiry

Nothing is ordered until you confirm the quote.

Prices on the reply are indicative until you confirm them.