Chicago-Latrobe
Chicago-Latrobe 54113 135° Cobalt Jobber Drill Bit .3020
135° cobalt jobber drill bit with split point, TiN coating and .3020 decimal size
- TypeDrill Bits
- 135° split point starts on contact without wandering
- Cobalt steel resists heat for longer edge life
- TiN coating reduces friction and extends cutting performance
- Jobber length reaches standard drilling depths efficiently
- Size N (.3020) matches precise letter-gauge requirements
Heavy-duty cobalt jobber bit
The Chicago-Latrobe 54113 is a new jobber-length drill bit made from cobalt steel with a TiN coating. It is sized for letter N with a decimal equivalent of .3020 and a 135-degree split point. This accessory targets mechanics and fabricators who need a durable bit for drilling hard metals in automotive or general workshop tasks.
Split-point geometry and coating
The 135-degree split-point tip reduces walking and starts holes cleanly without a centre punch. Cobalt construction resists heat and wear when cutting stainless steel, titanium or high-strength alloys. The TiN surface coating further lowers friction and extends cutting life. A straight shank fits standard three-jaw chucks on corded or cordless drill motors.
Heat resistance and cutting efficiency
Cobalt alloy retains hardness at elevated temperatures generated during deep or repetitive drilling. The split-point design decreases thrust force, which lowers motor load and heat buildup in the workpiece. No coolant holes are present, so external lubrication or peck drilling is recommended for sustained cuts in tough materials. The bit is ready for daily professional use.
Highlights
- 135° split point starts on contact without wandering
- Cobalt steel resists heat for longer edge life
- TiN coating reduces friction and extends cutting performance
- Jobber length reaches standard drilling depths efficiently
- Size N (.3020) matches precise letter-gauge requirements
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
What does the 135° split point mean for drilling accuracy?
The 135° split point reduces walking and lets the bit start on contact without a centre punch.
What shank size fits a standard drill chuck for the 54113 bit?
The jobber-length shank matches the .3020 diameter so it grips in any three-jaw chuck that accepts that size.
How do you install the cobalt bit without dulling the TiN coating?
Clamp the workpiece, apply cutting fluid, run at the correct RPM for cobalt, and ease the split point into the metal without forcing.
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