Chicago-Latrobe
Chicago-Latrobe 54108 135° Cobalt Jobber Drill Bit .2720 pneumatic accessory
A 135° split-point cobalt jobber drill bit with TiN coating drills precisely at .2720 inch
- TypeDrill Bits
- MaterialHAWA
- 135° split point reduces walking on hard metals
- Cobalt steel with TiN coating resists heat and wear
- .2720 inch jobber length fits standard chucks
- Size I letter drill covers common automotive tasks
- Heavy-duty construction handles high-torque pneumatic tools
Chicago-Latrobe 54108 Cobalt Drill Bit
The Chicago-Latrobe 54108 is a jobber length drill bit made from cobalt steel with a TiN coating for extended wear resistance. It features a 135 degree split point design that starts on contact and reduces walking. This bit suits maintenance technicians and metalworkers who need reliable hole-making in hard alloys.
Upgrading from standard high-speed steel bits
Standard high-speed steel bits dull quickly in stainless steel or titanium, forcing frequent changes. The cobalt construction here maintains hardness at higher temperatures, so the jump pays off when drilling tough materials repeatedly. It replaces worn general-purpose bits that struggle with work hardening.
Installation fits standard chucks
The straight shank seats in any three-jaw chuck sized for the .2720 inch diameter. The split point centres itself, so no centre punch is needed in most metals. The main issue arises if the chuck is undersized or worn, causing slippage under heavy feed pressure.
Highlights
- 135° split point reduces walking on hard metals
- Cobalt steel with TiN coating resists heat and wear
- .2720 inch jobber length fits standard chucks
- Size I letter drill covers common automotive tasks
- Heavy-duty construction handles high-torque pneumatic tools
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What chuck size fits the .2720 inch diameter shank?
The .2720 inch shank fits a standard 3/8 inch or larger drill chuck; tighten all three jaws evenly to prevent run-out.
How do I start the 135 degree split point without it walking?
Center-punch the work-piece, apply firm axial pressure, and begin at low RPM so the split point engages immediately.
When should I replace this cobalt bit?
Replace it when the cutting lips show visible rounding, the split point is chipped, or drilling force increases noticeably.
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