Chicago-Latrobe
Chicago-Latrobe 46612 Jobber Length Drill Bit 3/16 in Cobalt 135° Split Point
Cobalt jobber drill bit, 3/16 in with 135° split point for precise starts
- TypeDrill Bits
- MaterialHAWA
- Cobalt construction resists heat and wear
- 135-degree split point starts on contact without wandering
- Jobber length suits general-purpose drilling tasks
- 3/16-inch diameter covers common fastener sizes
- Decimal equivalent .1875 simplifies precision layout
3/16 in Cobalt Jobber Bit
The Chicago-Latrobe 46612 is a 3/16 inch cobalt drill bit built for jobber length applications. Its 135 degree split point design reduces walking and starts holes cleanly in metal. The straw bronze finish identifies the cobalt construction. It suits maintenance technicians and metal fabricators who need reliable drilling in tough alloys.
Heat resistance and cutting action
Cobalt steel retains hardness at the elevated temperatures generated when drilling stainless steel or high-strength alloys. The split point geometry lowers thrust requirements, which reduces heat buildup and extends edge life. No coolant holes are present, so external lubrication is recommended for deep cuts. The design balances cutting speed with bit longevity in normal shop use.
Shank fit and everyday handling
The fractional 3/16 inch diameter matches standard drill chucks and quick-change adapters without sleeves. Jobber length provides sufficient reach for most bench and handheld tasks while keeping the bit rigid. The non-coolant-through body simplifies resharpening on a standard grinder. Decimal equivalent .1875 aids quick reference against tap charts.
Highlights
- Cobalt construction resists heat and wear
- 135-degree split point starts on contact without wandering
- Jobber length suits general-purpose drilling tasks
- 3/16-inch diameter covers common fastener sizes
- Decimal equivalent .1875 simplifies precision layout
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How do I install the 3/16 in cobalt drill bit with a 135° split point in my drill chuck?
Insert the shank fully into the chuck jaws and tighten securely; the split point centres itself so the step people get wrong is leaving a gap that lets the bit wander.
What maintenance or replacement will the cobalt HAWA jobber bit need later?
Cobalt steel resists heat but the cutting edges still dull; resharpen the 135° split point on a bench grinder or replace the bit when holes become oversized.
What limit appears first when drilling steel continuously with the 0.1875 in split-point bit?
Heat builds up at the tip because there are no coolant holes, so the bit loses hardness before the cobalt alloy reaches its wear limit.
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