Chicago-Latrobe
Chicago-Latrobe 44928 135 Degree Cobalt Drill Bit
A 7/16 inch cobalt jobber drill bit with a 135 degree split point and TiAlN coating for heavy-duty drilling
- TypeDrill Bits
- MaterialHAWA
- 135-degree split point starts on contact without wandering
- Cobalt steel resists heat during heavy-duty drilling
- TiAlN coating reduces friction and extends edge life
- Jobber length reaches deeper holes in one pass
- 7/16 in fractional size fits standard chucks
Jobber Length Drill Bit
The Chicago-Latrobe 44928 is a heavy-duty cobalt drill bit built for professional metalworking. Its jobber length suits standard drilling depths in steel and tough alloys. Machinists and maintenance technicians choose it for repeatable hole accuracy in production or repair work.
Installation and common issues
The 135 degree split point is self-centering and reduces walking on hard surfaces, so no centre punch is needed in most materials. Cobalt construction resists heat, yet excessive speed or insufficient lubrication will still dull the cutting edges. The TiAlN coating adds wear resistance but does not eliminate the need for proper chip evacuation.
7/16 inch fractional size
This bit cuts a precise 0.4375 inch diameter hole, matching the 7/16 inch fractional standard. The 135 degree point angle is optimised for stainless steel and high-tensile alloys rather than soft metals. Buyers who need a different diameter or a coolant-through design must select another part number.
Highlights
- 135-degree split point starts on contact without wandering
- Cobalt steel resists heat during heavy-duty drilling
- TiAlN coating reduces friction and extends edge life
- Jobber length reaches deeper holes in one pass
- 7/16 in fractional size fits standard chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How can I confirm the 135-degree split point is cutting correctly after I start drilling?
The split point should self-centre immediately and produce short, curled chips in steel without the bit walking across the surface.
What comes in the package and what must I supply separately?
The box contains only the 44928 cobalt jobber bit; you will need a compatible drill chuck and cutting fluid for the material you are drilling.
Which specification should I match when choosing between available versions of this bit?
Select the version whose fractional size and decimal equivalent (.4375) match the hole diameter required by your application.
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