Cleveland Golf
Cleveland Golf Parabolic Cobalt Jobber Drill 1/4 In 135 Deg 2075
A cobalt steel jobber drill bit with a 135-degree point and parabolic flutes for efficient chip removal in deep holes
- TypeAngle, Pitch & Slope Locators
- 135° notch point starts on contact without walking
- Parabolic flutes clear chips faster in deep holes
- Cobalt steel edge holds hardness at high heat
- 1/4″ shank fits standard drill chucks directly
- High-performance grade rated for stainless and alloys
Precision Jobber Drill Bit
The Cleveland Golf Parabolic Cobalt Jobber Drill 1/4 In 135 Deg 2075 is a fractional-inch cutting tool for metalworking professionals and maintenance technicians. Its cobalt steel construction and 135-degree notch point suit high-performance drilling in tough alloys. The parabolic flute geometry aids chip evacuation during deep-hole operations. Right-hand cutting direction matches standard machine tooling.
Parabolic Flute Chip Limits
The parabolic flute design improves chip flow compared with standard twist drills, yet it has practical limits in extremely deep or interrupted cuts. Coolant is not fed through the tool, so external flood or mist cooling is required to manage heat in abrasive materials. The 135-degree point angle reduces walk on hard surfaces but demands rigid setups to prevent corner breakdown. Operators must match feed rates to the flute capacity.
Cobalt Steel Build Quality
Cobalt steel substrate retains hardness at elevated temperatures, extending tool life in stainless steel and high-tensile alloys. The straw/bronze finish indicates heat treatment rather than a coating, so edge integrity remains consistent after resharpening. A 1/4-inch straight shank fits standard drill chucks and collets without adapters. The 4-inch overall length and 2-3/4-inch flute length balance reach and rigidity for general shop use.
Highlights
- 135° notch point starts on contact without walking
- Parabolic flutes clear chips faster in deep holes
- Cobalt steel edge holds hardness at high heat
- 1/4″ shank fits standard drill chucks directly
- High-performance grade rated for stainless and alloys
Specifications
| Brand | Cleveland |
|---|---|
| Type | Angle, Pitch & Slope Locators |
Questions about this item
Which drill bit size matches the 0.2500 decimal equivalent listed?
The 1/4 inch drill bit corresponds to the 0.2500 decimal equivalent shown in the specifications.
How does the 135 degree point angle affect drilling performance?
A 135 degree point angle reduces walking and improves centring on hard materials like stainless steel.
What does the cobalt steel material mean for tool life?
Cobalt steel maintains hardness at higher temperatures, extending bit life when drilling tough alloys.
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