Chicago-Latrobe
Chicago-Latrobe 50078 135° Cobalt Jobber Drill Bit 9/16 in
Cobalt jobber drill bit with a 135-degree split point for 9/16-inch holes
- TypeDrill Bits
- MaterialHAWA
- 135° split point starts on contact
- Cobalt steel resists heat in tough metals
- 9/16 in fractional size for standard holes
- Jobber length reaches deeper work areas
- Straw bronze finish reduces friction and wear
Chicago-Latrobe 50078 Cobalt Jobber Bit
The Chicago-Latrobe 50078 is a heavy-duty jobber-length drill bit made from cobalt steel. Its 135-degree split point reduces walking and starts holes cleanly in hard materials. The fractional 9/16 inch size suits maintenance and fabrication tasks. Cobalt construction resists heat and wear during extended drilling sessions.
Suits hard-metal drilling.
This bit serves machinists and technicians drilling stainless steel, titanium and other tough alloys without through-coolant capability. The split-point geometry helps accuracy on curved or angled surfaces. Buyers needing internal coolant delivery or carbide-grade tooling should look at different tooling. The straw-bronze finish identifies the cobalt substrate.
135-degree split point starts holes on contact
The 135-degree split point is the decisive spec: it self-centres on hard metals without a centre punch. Decimal equivalent 0.5625 inch confirms the exact diameter for tight-tolerance work. Jobber length provides standard reach for general-purpose drilling. No coolant holes means external lubrication is required.
Highlights
- 135° split point starts on contact
- Cobalt steel resists heat in tough metals
- 9/16 in fractional size for standard holes
- Jobber length reaches deeper work areas
- Straw bronze finish reduces friction and wear
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What comes in the box with the Chicago-Latrobe 50078 drill bit?
The package contains the single 9/16 inch cobalt jobber drill bit with a 135 degree split point. No additional accessories or coolant hardware are included.
How do I choose the right version of the 50078 bit for my application?
This model is offered in a single 9/16 inch size with a 135 degree point angle and cobalt construction. Select it when you need that exact diameter and heavy-duty performance.
What does the 135 degree point angle mean when drilling?
The 135 degree split point reduces walking and starts the hole faster on hard materials, while the cobalt steel resists heat during extended use.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
