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Cobalt jobber drill, straw finish, parabolic flutes, #3 size, 135-degree point

Cleveland Golf

Cleveland Golf Jobber Drill Parabolic #3 Cobalt 135° 0.2130 2075

SKU CH-B0MY-102XW

Cobalt jobber drill with a 135° parabolic flute for stainless steel and high-strength alloys

  • Parabolic flute improves chip evacuation and coolant flow
  • 135° notched point increases stability and reduces work hardening
  • Cobalt steel construction suits hard alloys and stainless steel
  • TiAlN coating resists oxidation and extends drill life
  • California Proposition 65 warning applies to this product

Cleveland Cobalt Jobber Drill #3

The Cleveland Cobalt Jobber Drill #3 is a high-performance cutting tool engineered for precision drilling in demanding materials. Its parabolic flute design and 135-degree notched point target professional machinists and maintenance technicians who require tight hole tolerances in tough alloys. The straw-finished cobalt steel construction suits workshops processing stainless steel, tool steels, and high-strength alloys.

Parabolic flute coolant flow chip control

The parabolic flute form combines with wider flute spacing to improve coolant flow directly to the cutting zone during operation. This geometry produces tighter, more manageable chips while actively reducing chip packing in deep holes. The modified notched point increases drilling stability and lessens work hardening, contributing to consistent performance and extended tool life under high temperatures.

0.2130 inch diameter wire gauge #3

This drill measures 0.2130 inches in decimal equivalent, corresponding exactly to wire gauge size #3 with a matching shank diameter. The overall length is 3-3/4 inches with a 2-1/2 inch flute length, defined by list number 2075. Buyers needing a different diameter, a longer flute, or a non-cobalt substrate must select an alternative tool.

How it compares

Measured against everything we stock in Utility & Specialty Hand Tools, at today’s prices. Recalculated every night.

Price $13.99
Cheaper than about 70% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameCleveland

Questions about this item

How do I install the #3 parabolic jobber drill correctly, and what step is commonly missed?

Chuck the 0.2130 inch shank securely in a drill press or lathe, then verify the 135 degree notch point runs true before starting — skipping the run-out check causes wandering holes.

What maintenance or replacement will this cobalt drill need over time?

The TiAlN coating resists oxidation, but once the straw finish wears and the 135 degree notch point dulls beyond resharpening limits, replace the bit to maintain hole tolerance.

Which limit appears first during sustained drilling in stainless steel?

Heat buildup at the cutting edges degrades the cobalt substrate faster than chip packing, so the 135 degree parabolic flute's coolant flow becomes the controlling factor for tool life.

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