Chicago-Latrobe
Chicago-Latrobe 46796 135° Cobalt Jobber Drill Bit Z .4130
A 135° split-point cobalt jobber drill bit in size Z with a .4130 decimal equivalent
- TypeDrill Bits
- MaterialHAWA
- Cobalt steel resists heat and wear for longer bit life
- 135° split point starts on contact and reduces wandering
- Jobber length gives standard reach for general drilling
- Size Z (.4130 in) fits precise fractional-hole requirements
- Heavy-duty construction handles tough materials in demanding applications
Chicago-Latrobe Cobalt Jobber Drill Bit
The Chicago-Latrobe 46796 is a heavy-duty cobalt jobber length drill bit sized to letter Z with a decimal equivalent of .4130. It targets professional mechanics and fabricators who need reliable hole-making in tough alloys and stainless steel.
135 Degree Split Point Reduces Walking
The 135 degree split point geometry centres the bit without a centre punch, lowering thrust force and heat build-up during drilling. Cobalt construction resists abrasion and maintains hardness at elevated temperatures for extended tool life.
Non-Coolant Through Design Simplifies Setup
This bit has zero coolant holes, so it runs with external flood or mist coolant only, keeping the toolholder and spindle clean. The straw bronze finish aids chip evacuation and lets the operator see wear at a glance.
Highlights
- Cobalt steel resists heat and wear for longer bit life
- 135° split point starts on contact and reduces wandering
- Jobber length gives standard reach for general drilling
- Size Z (.4130 in) fits precise fractional-hole requirements
- Heavy-duty construction handles tough materials in demanding applications
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How do I install the Chicago-Latrobe 46796 cobalt jobber bit in my drill chuck, and what step is often missed?
Open the chuck jaws wide, insert the straight shank fully, then tighten securely; the step many miss is verifying the split point runs true before drilling.
What maintenance or replacement will the 135° split-point cobalt bit need over time?
The HAWA cobalt steel resists wear, but the cutting edges will dull; plan to resharpen the 135° split point or replace the bit when holes become oversize.
What limit appears first when using the .4130-inch bit continuously in hard metal?
Heat buildup at the non-coolant-through design is the first limit; the straw/bronze surface helps, but sustained drilling requires pauses or cutting fluid.
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