Chicago-Latrobe
Chicago-Latrobe 47716 135° Cobalt Jobber Drill Bit 1/4 in
Cobalt jobber drill bit model 47716 has a 135-degree split point for heavy-duty drilling
- TypeDrill Bits
- MaterialHAWA
- 135° split point starts on contact without wandering
- Cobalt steel resists heat for longer cutting life
- 1/4 in fractional size fits standard chucks
- Jobber length reaches deeper holes in one pass
- Straw bronze finish reduces friction and chip welding
Chicago-Latrobe 47716 Cobalt Drill Bit
The Chicago-Latrobe 47716 is a jobber-length drill bit made from HAWA cobalt steel with a 135-degree split point. It measures 1/4 inch with a decimal equivalent of .2500 and features a straw-bronze finish. Designed for heavy-duty drilling tasks in metal, it requires no coolant through holes. This bit suits professional workshops and maintenance crews needing reliable performance in tough alloys.
Machinists drilling stainless or high-tensile steel
This bit serves machinists and fabricators who need a durable cobalt tool for hard metals. The split point reduces walking on hardened surfaces. It is not for buyers who want a coated bit for high-speed production runs, nor for those needing coolant-fed drilling for deep holes. Woodworkers and general DIY users will find standard HSS bits more economical for softer materials.
Cobalt steel holds edge under sustained heat
Under continuous load the cobalt substrate resists softening better than standard high-speed steel, keeping the cutting lips sharp during extended drilling cycles. The 135-degree point angle distributes pressure evenly, reducing chatter when feed rates stay consistent. Without internal coolant channels, heat builds in deep cuts, so periodic withdrawal clears chips and preserves tool life.
Highlights
- 135° split point starts on contact without wandering
- Cobalt steel resists heat for longer cutting life
- 1/4 in fractional size fits standard chucks
- Jobber length reaches deeper holes in one pass
- Straw bronze finish reduces friction and chip welding
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What drill chuck size do I need to hold the 1/4 in shank?
A 1/4 in or larger three-jaw chuck will grip the jobber-length shank securely.
Will the 135° split point start cleanly in the same steel my older HSS bits struggle with?
The cobalt alloy and 135° split point reduce walking and cut harder steel more easily than standard HSS.
How can I confirm the bit is cutting true after the first hole?
Check that the hole diameter matches the .2500 decimal equivalent and that the walls show no chatter marks.
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