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Cobalt steel jobber drill bit, black oxide finish, split point, 135 degree angle

Cleveland Golf

Cleveland Golf Angle Pitch Slope Locator 3780 135 Deg .5000

SKU CH-4VWK-8XWDD

Measures angles, pitch and slope with a 135 degree split point on a cobalt steel jobber drill bit .5000 inches in diameter

  • TypeAngle, Pitch & Slope Locators
  • Precision drilling with 135° split-point geometry
  • Cobalt steel construction handles alloy and stainless steels
  • Black oxide finish resists wear during heavy-duty use
  • Jobber-length design suits 4×D depth-to-diameter ratio
  • Right-hand spiral flutes clear chips efficiently

Jobber Drill Bit 3780

The Cleveland Golf Angle Pitch Slope Locator 3780 is a fractional inch jobber drill bit sized at .5000 inch. It is made from cobalt steel with a black oxide finish for heavy duty drilling in alloy, carbon, stainless and tool steel. The split point design aids accurate starting.

135 Degree Point Angle Constraint

The 135 degree point angle suits harder materials but reduces centering precision on very soft stock compared to sharper points. Cobalt steel handles heat well yet remains brittle if the drill wanders or feed pressure fluctuates. A rigid setup and steady feed are required to prevent chipping.

Upgrade From Standard High Speed Steel

This bit replaces general purpose high speed steel drills when tool life in tough alloys falls short. The step is worthwhile when hole counts rise and work hardening dulls lesser bits quickly. It is not for buyers who need coolant through capability or left hand cutting direction.

Highlights

  • Precision drilling with 135° split-point geometry
  • Cobalt steel construction handles alloy and stainless steels
  • Black oxide finish resists wear during heavy-duty use
  • Jobber-length design suits 4×D depth-to-diameter ratio
  • Right-hand spiral flutes clear chips efficiently

Specifications

BrandCleveland
TypeAngle, Pitch & Slope Locators

Questions about this item

Should I choose the 135 degree split-point version or a different point angle for alloy and stainless steel?

The 135 degree split-point geometry is designed for alloy, carbon, stainless and tool steel, reducing walk and cutting efficiently in those materials.

How does the 135 degree point angle perform once the drill is in a machine spindle?

The 135 degree split point centres quickly without a centre punch, lowering thrust and heat when drilling alloy, carbon, stainless and tool steel up to four diameters deep.

What does the straight 1/2 inch shank mean for tool-holding and depth capability?

The 1/2 inch straight shank fits standard drill chucks and collets, while the 2-1/4 inch flute length supports the 4xD depth-to-diameter ratio in a single pass.

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