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Cylindrical silver drill bit with spiral flutes, 33/64 inch size

Cobra Carbide

Cobra Carbide 55987 3xD Non-Coolant Drill Bit 33/64

SKU CH-YGJC-4XD06

A 33/64-inch high-performance drill bit with a 3xD non-coolant design for efficient drilling

  • 3xD drilling depth reduces cycle time
  • Non-coolant design simplifies setup and chip removal
  • 33/64 inch diameter suits precise hole sizing
  • Cobra Carbide construction resists wear in tough materials
  • Model 55987 identifies the exact tool for reordering

Application & Purpose

The Cobra Carbide 55987 is a 33/64 inch diameter drill bit built for 3xD depth drilling without through-coolant. It suits machine shops and maintenance teams that need a solid-carbide tool for short-hole work in steel, cast iron or similar alloys where flood coolant is unavailable or impractical.

Thermals, Noise & Power Draw

As a non-coolant solid-carbide bit, heat is managed by the tool substrate and chip evacuation rather than external fluid. Normal cutting parameters keep the tip temperature in a range that preserves edge life, while the rigid shank minimises vibration and the associated acoustic signature on standard CNC or manual machines.

Sustained Load Behaviour

In continuous 3xD drilling the flute geometry evacuates chips reliably, preventing packing that would spike torque or deflect the bit. The carbide construction resists wear at the margins so hole size stays consistent through repeated cycles, and the absence of coolant channels eliminates the risk of internal blockage during long runs.

How it compares

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

Price $134.99
Pricier than about 89% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCOBRA CARBIDE

Questions about this item

How do I install the 55987 33/64 drill bit without damaging the shank?

Tighten the chuck evenly on the smooth shank; the step people get wrong is over-tightening one jaw first, which bends the 3xD body.

What maintenance will the 55987 33/64 bit need later?

Resharpen the cutting edges when holes become oversized; no coolant passages to clean because it is a non-coolant design.

What limit appears first on the 55987 33/64 bit during sustained drilling?

The 3xD flute length fills with chips, so chip evacuation stops the cut before the carbide wears out.

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