Chicago-Latrobe
Chicago-Latrobe 47726 13/32 in 135 Degree Cobalt Jobber Drill Bit
13/32 in cobalt jobber drill bit with 135-degree split point for hard-metal drilling
- TypeDrill Bits
- MaterialHAWA
- 13/32 in jobber length drills deep holes
- 135-degree split point starts on contact without walking
- Cobalt steel resists heat in hard metals
- Straw bronze finish reduces friction during cutting
- Decimal equivalent .4063 matches precise specifications
Chicago-Latrobe 47726 Cobalt Jobber Drill Bit
The Chicago-Latrobe 47726 is a jobber-length drill bit made from cobalt steel for drilling hard metals such as stainless steel. It suits professional mechanics and maintenance technicians who need a durable bit for repetitive heavy-duty work.
135-Degree Split Point and Straw Finish
The 135-degree split point reduces walking and starts holes on contact without a centre punch. The straw bronze surface treatment identifies the cobalt grade and adds lubricity to help clear chips during deep cuts.
Straight Shank Fits Standard Chucks
The straight shank fits any standard three-jaw chuck without adapters. The bit has no coolant holes so it cannot be used with through-spindle coolant systems. Oversized chucks may not grip the 13/32 inch shank securely.
Highlights
- 13/32 in jobber length drills deep holes
- 135-degree split point starts on contact without walking
- Cobalt steel resists heat in hard metals
- Straw bronze finish reduces friction during cutting
- Decimal equivalent .4063 matches precise specifications
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How often will the cobalt jobber bit need resharpening when drilling hardened steel?
The 135-degree split point on the cobalt alloy holds its edge longer than high-speed steel, so resharpening intervals are extended for typical job-shop workloads.
At what point does the 13/32-inch flute geometry limit chip evacuation in deep holes?
Once hole depth approaches several times the 0.4063-inch diameter, the standard jobber flutes can pack with chips and require frequent pecking to clear.
How much heat builds up in the shank during continuous drilling with this 47726 bit?
Cobalt dissipates heat into the chips rather than the shank, keeping the tool cooler during sustained cuts, though the straw-bronze surface will still warm noticeably under load.
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