Chicago-Latrobe
Chicago-Latrobe 44931 31/64 in 135° Cobalt Drill Bit
A 31/64 inch cobalt jobber drill bit with a 135 degree split point for heavy-duty drilling
- TypeDrill Bits
- MaterialHAWA
- 31/64 inch size drills precise holes in metal
- 135° split point starts on contact without wandering
- Cobalt construction resists heat for longer edge life
- TiAlN coating reduces friction and extends bit durability
- Jobber length provides standard reach for general drilling
Chicago-Latrobe 44931 Cobalt Drill Bit
This 31/64 inch cobalt jobber length drill bit is built for heavy-duty drilling in tough materials such as stainless steel and high-strength alloys. The split point design provides accurate starting without a centre punch, reducing walk on hard surfaces. It suits professional mechanics and fabrication shops that need reliable performance in demanding applications.
135 Degree Split Point Capacity
The 135 degree split point handles high cutting forces and resists chipping when drilling abrasive or work-hardening metals. Cobalt construction maintains hardness at elevated temperatures, giving extended life in production runs. The bit reaches its limit in extremely deep holes where chip evacuation becomes difficult without coolant through holes.
Jobber Length Build Fit
Jobber length proportions fit standard drill chucks and quick-change adapters without requiring extended holders. The straight shank allows use in both portable drills and fixed drill presses. The TiAlN coating reduces friction and heat buildup, freeing the operator from frequent lubrication stops during repetitive drilling tasks.
Highlights
- 31/64 inch size drills precise holes in metal
- 135° split point starts on contact without wandering
- Cobalt construction resists heat for longer edge life
- TiAlN coating reduces friction and extends bit durability
- Jobber length provides standard reach for general drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will this 31/64 in cobalt bit fit the chuck on my older 1/2 in drill press?
The 31/64 in shank is just under 1/2 in, so it seats securely in any standard 1/2 in chuck found on older drill presses.
How do I verify the 135 degree split point is cutting correctly after I install it?
The split point should self-centre without a centre punch and produce short, curly chips in steel when the 135 degree angle is engaging properly.
Does the 44931 come with a case or just the single TiAlN coated bit?
Only the single 31/64 in cobalt jobber length drill bit is supplied; no case, index or additional accessories are included.
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