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10mm cobalt jobber drill bit straw bronze finish split point 135 degree angle

Cleveland Golf

Cleveland Golf Jobber Drill 10mm Cobalt 135° NAS 907

SKU CH-WS8M-BA6MZ

Cobalt steel jobber drill with 135° split point for precision drilling in tough materials

  • Product typeAngle, Pitch & Slope Locators
  • 10 mm cobalt steel resists heat and wear
  • 135° split point starts on contact without walking
  • NAS 907 Grade J meets aerospace inspection requirements
  • 133 mm overall length reaches deep holes
  • 87 mm flute clears chips efficiently

Precision 10 mm Cobalt Drill

The Cleveland Golf Jobber Drill is a 10 mm cobalt steel bit built to NAS 907 Type J standards. Its 135 degree split point reduces walking and starts holes cleanly in hard metals. The straw-bronze finish identifies the heavy-duty cobalt grade. Right-hand spiral flutes clear chips efficiently during deep drilling.

Replaces Worn High-Speed Bits

Switch to this bit when standard high-speed steel drills dull quickly in stainless steel, titanium or high-temperature alloys. The cobalt substrate holds hardness at elevated temperatures, extending life between resharpening. The upgrade pays off in repeated production runs where bit changes cost downtime.

Fits Standard 10 mm Chucks

The 10 mm straight shank seats directly in any drill press or hand drill accepting 10 mm capacity. No reduced shank or sleeve is needed. The 87 mm flute length and 133 mm overall length reach through thick plate while leaving clearance for the chuck. Non-coolant-through design suits flood or mist lubrication.

How it compares

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

Price $12.99
Cheaper than about 73% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameCleveland
Product typeAngle, Pitch & Slope Locators

Questions about this item

What chuck size fits the 10 mm shank on this NAS 907 drill bit?

The shank diameter is 10.00 mm, so a 10 mm drill chuck or collet is required for a secure grip.

How do I start the hole correctly with the 135° split point?

Apply steady pressure at the centre mark; the 135° split point self-centres and cuts on contact without a centre punch.

When should I replace this cobalt jobber drill?

Replace the bit when the cutting lips show visible rounding or when drilling 10 mm holes requires noticeably more feed force.

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