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Cleveland Golf cobalt jobber drill bit, straw bronze finish, parabolic flutes, 135 degree point

Cleveland Golf

Cleveland Golf Jobber Drill #12 Cobalt 135° Parabolic

SKU CH-PE4E-TCFMQ

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

  • TypeAngle, Pitch & Slope Locators
  • Cobalt steel construction withstands high heat when drilling tough alloys
  • 135-degree split point starts on contact without walking across the surface
  • Parabolic flute geometry clears chips efficiently from deep holes
  • #12 wire gauge (0.1890 in.) suits precision fastening tasks
  • 8 mm shank fits standard drill chucks for quick changeover

Cobalt Jobber Drill #12

The Cleveland Golf Jobber Drill #12 is a cobalt steel cutting tool built for high-performance drilling. Its 135-degree notch point and parabolic flute design suit professionals machining tough alloys. It targets machinists and maintenance teams who need reliable hole-making in difficult materials.

0.1890 inch diameter capacity

The drill handles chilled cast iron, high-speed steel, high-strength alloy steel, stainless steel and tool steels. The parabolic flute clears chips efficiently in deep holes up to its 2-5/16 inch flute length. It runs out when hole depth exceeds the flute length or when material hardness surpasses cobalt steel capability.

3-1/2 inch overall length fit

The 4.8mm shank diameter fits standard drill chucks and collets without adapters. Right-hand cutting direction matches conventional machine spindle rotation. Non-coolant-through design frees up coolant system complexity for simpler shop setups. California Proposition 65 warning applies.

Highlights

  • Cobalt steel construction withstands high heat when drilling tough alloys
  • 135-degree split point starts on contact without walking across the surface
  • Parabolic flute geometry clears chips efficiently from deep holes
  • #12 wire gauge (0.1890 in.) suits precision fastening tasks
  • 8 mm shank fits standard drill chucks for quick changeover

Specifications

BrandCleveland
TypeAngle, Pitch & Slope Locators

Questions about this item

Will the 135-degree point angle and cobalt steel work with my older drill press?

The 135-degree notch point and cobalt steel construction suit standard drill presses and handle chilled cast iron, high-speed steel, high-strength alloy steel, stainless steel and tool steels.

How can I confirm the #12 size is cutting correctly after setup?

Check that the drill produces clean chips and the hole matches the 0.1890 decimal equivalent; the parabolic flute design aids chip evacuation in deep holes.

Does the box include any coolant or cutting fluid for the parabolic flutes?

The drill bit is sold individually as a non-coolant-through tool; cutting fluid or coolant must be purchased separately for the intended materials.

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