We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Cobra Carbide 39673 3-flute drill bit, AlTiN coated, 39/64 inch

Cobra Carbide

Cobra Carbide 39673 3 Flute Drill AlTiN Coated 39/64

SKU CH-RGNT-M13F2

Three-flute drill bit with AlTiN coating cuts 39/64 inch holes at 0.6094 decimal equivalent

  • Three-flute geometry clears chips faster for smoother holes
  • AlTiN coating resists heat and wear for longer tool life
  • 39/64 inch size drills precise 0.6094 diameter holes
  • Solid carbide construction handles tough materials without flex
  • New condition guarantees full factory performance out of the box

Precision drill for 39/64 inch holes

The Cobra Carbide 39673 is a solid-carbide drill with an AlTiN coating, sized at 39/64 inch (decimal 0.6094). It is intended for machinists and maintenance teams who need accurate hole-making in ferrous and non-ferrous metals. The three-flute design improves chip evacuation and hole straightness compared with standard two-flute tools. California Proposition 65 warnings apply to this product.

Suited for dedicated 39/64 inch drilling

This drill suits shops that repeatedly produce 39/64 inch holes and want the wear resistance of an AlTiN coating. It is not for operators who need a range of diameters, step drilling or larger capacity in a single tool. Buyers requiring coolant-through capability or a different shank style should look at other product lines.

39/64 inch cutting diameter

The decisive specification is the 39/64 inch cutting diameter, which fixes the hole size this tool produces. If the drawing calls for a different diameter, this drill cannot be used and another size must be selected.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $279.99
Pricier than about 91% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCOBRA CARBIDE

Questions about this item

What shank size does the 39/64 drill require in the chuck?

The drill uses a 39/64 inch shank, matching its cutting diameter, so a chuck or collet that accepts 0.6094 inch is needed.

How do I install the 3-flute AlTiN drill without damaging the coating?

Clamp the shank firmly, use cutting fluid, start at low RPM to centre the point, then increase speed; do not tighten the chuck on the fluted section.

When should the 39673 drill be replaced?

Replace it when the AlTiN coating shows wear, the three cutting edges chip or dull, or hole tolerance exceeds the 0.6094 inch spec.

More in Bits, Hole Saws & Accessory Kits

Similar items