Chicago-Latrobe
Chicago-Latrobe 44965 135° Cobalt Jobber Drill Bit U .3680
Heavy-duty cobalt jobber drill bit with 135-degree split point and TiAlN coating for precision drilling at .3680 diameter
- TypeDrill Bits
- MaterialHAWA
- 135° split point starts on contact without walking
- Cobalt steel with TiAlN coating resists heat and wear
- Jobber length gives standard reach for general drilling
- Letter-size U (.3680) fits precise hole requirements
- Heavy-duty construction handles tough materials cleanly
Chicago-Latrobe 44965 Cobalt Jobber Bit
The Chicago-Latrobe 44965 is a heavy-duty cobalt jobber length drill bit manufactured for professional and industrial drilling tasks. It features a split point design that promotes accurate starting without a centre punch. The bit is constructed from HAWA cobalt material with a TiAlN coating for extended tool life in demanding applications.
Suited for hard metal drilling.
This bit suits machinists and maintenance technicians drilling work-hardening alloys such as stainless steel or titanium where cobalt hardness and the 135 degree point angle resist wear. It is not suited for operations requiring internal coolant delivery because the tool has zero coolant holes and a non-coolant-through design. Buyers needing through-tool coolant should look at a different drill style.
Critical spec: .3680 inch decimal equivalent
The single specification that decides fit is the .3680 inch decimal equivalent, which corresponds to a letter U drill size. This exact diameter determines whether the bit matches the hole requirement for tapping, reaming or clearance operations. Verify the .3680 inch size against your engineering drawing or tap chart before purchasing.
Highlights
- 135° split point starts on contact without walking
- Cobalt steel with TiAlN coating resists heat and wear
- Jobber length gives standard reach for general drilling
- Letter-size U (.3680) fits precise hole requirements
- Heavy-duty construction handles tough materials cleanly
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What happens when the TiAlN coating reaches its temperature limit during sustained drilling?
The TiAlN coating maintains hardness at higher temperatures than uncoated cobalt, delaying wear when drilling stainless steel or titanium alloys at jobber-length speeds.
How much heat and noise should I expect during all-day use?
Cobalt generates more heat than high-speed steel; use cutting fluid and expect typical drill-motor noise — the split point reduces thrust force, which lowers motor load and heat buildup.
What must my drill provide to run this bit?
A three-jaw chuck that opens to at least .3680 inch decimal equivalent and a spindle speed suitable for cobalt jobber drills in the material you are cutting.
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