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Cobra Carbide 55961 9.80 mm drill bit, silver finish

Cobra Carbide

Cobra Carbide 55961 3xD Non-Coolant Drill 9.80 mm .3858

SKU CH-4E25-6JJN1

A 9.80 mm solid-carbide drill with a 3xD flute length for non-coolant drilling

  • 3xD length gives deeper holes per pass
  • Non-coolant design suits dry machining setups
  • 80 mm diameter matches metric tooling standards
  • .3858 decimal equivalent simplifies imperial programming
  • Cobra Carbide construction resists wear in production use

Drill Bit 9.80 mm 3xD Length

The Cobra Carbide 55961 is a solid carbide drill bit with a 9.80 mm cutting diameter and a 3xD flute length. It is engineered for high-performance drilling without through-coolant channels. The decimal equivalent of the diameter is .3858 inches.

Suited for Short-Hole Drilling

Machinists drilling shallow holes in steel, cast iron or non-ferrous alloys will find this tool effective. It is not intended for deep-hole applications requiring coolant-fed flutes or for diameters outside the 9.80 mm specification.

Diameter 9.80 mm Decides Fit

The 9.80 mm metric diameter is the single specification that determines whether this bit matches the required hole size. Verify the target hole tolerance against this exact figure before ordering.

How it compares

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

Price $85.99
Pricier than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCOBRA CARBIDE

Questions about this item

How deep can the 55961 9.80 mm drill cut before chip evacuation becomes the limiting factor?

The 3xD design allows a drilling depth of roughly three times the 9.80 mm diameter before chips need clearing.

Does the non-coolant 55961 drill generate noticeably more heat or noise during continuous operation?

Without through-coolant the cutting zone runs hotter, so expect higher temperatures and more audible cutting noise on long runs.

What shank size must my drill chuck or collet accept for the 55961 to fit?

The 55961 uses a standard 9.80 mm (.3858 in) shank, so a holder that grips that exact diameter is required.

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