Chicago-Latrobe
Chicago-Latrobe 44028 118° Jobber Drill Bit 7/16 in HSS Black Oxide
General-purpose jobber drill bit with 118° point angle, 7/16 in size, high-speed steel construction, and black oxide finish
- TypeDrill Bits
- 118° point angle centres the bit quickly
- 7/16 in fractional size fits standard holes
- High-speed steel resists wear in tough materials
- Black oxide finish reduces friction and heat build-up
- Jobber length gives versatile reach for general drilling
Jobber Drill Bit for General Drilling
The Chicago-Latrobe 44028 is a 7/16 inch high-speed steel jobber drill bit built for general-purpose drilling in metal, wood and plastic. Its 118-degree conventional point starts cleanly without a pilot hole. The fractional size suits maintenance, fabrication and automotive tasks where imperial dimensions are specified. The black oxide finish reduces friction and resists corrosion during repeated use.
Practical Limits of the 118-Degree Point
The 118-degree point angle is optimised for softer materials and shallow holes; it can wander on hard alloys or curved surfaces without a centre punch. The conventional point lacks the self-centring split-point geometry found on bits designed for stainless steel or deep-hole work. No coolant-through channels are present, so chips must clear through the flutes alone. Continuous drilling in tough metals may require frequent withdrawal to prevent overheating.
Black Oxide Finish and Round Shank
The black oxide coating holds cutting lubricant and slows surface rust, extending bit life in damp shop conditions. The round shank fits standard three-jaw chucks and quick-change adapters without slippage when tightened correctly. Jobber-length proportions keep the bit rigid enough for hand-held drills while reaching through standard workpiece thicknesses. The bit is not coolant-through, so external flood or mist cooling must be arranged for high-volume production runs.
Highlights
- 118° point angle centres the bit quickly
- 7/16 in fractional size fits standard holes
- High-speed steel resists wear in tough materials
- Black oxide finish reduces friction and heat build-up
- Jobber length gives versatile reach for general drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Should I choose the 7/16 in bit or a different diameter for my job?
Select the 7/16 in bit when the hole must be exactly .4375 in. For other diameters, choose the matching fractional size.
What does the 118 degree point angle do in a real machine?
The 118 degree conventional point centres quickly in steel and wood, giving clean entry without a pilot hole.
How does the black oxide finish affect drilling performance?
Black oxide reduces friction and resists corrosion on the high speed steel, extending bit life in general purpose drilling.
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