Chicago-Latrobe
Chicago-Latrobe 46627 Jobber Drill Bit 27/64 in 135° Split Point Cobalt
A 27/64-inch cobalt jobber drill bit with a 135° split point for self-centering starts in metal
- TypeDrill Bits
- MaterialHAWA
- Cobalt construction resists heat and wear for longer life
- 135° split point starts on contact without walking
- 27/64 in diameter suits precise fractional-inch drilling
- Jobber length gives standard reach for general-purpose work
- Straw bronze finish reduces friction and improves chip flow
Chicago-Latrobe 46627 Cobalt Jobber Bit
This Chicago-Latrobe 46627 drill bit is a cobalt jobber-length tool sized at 27/64 inch with a 135-degree split point. It is built for machinists and maintenance technicians who need a durable bit for drilling hard metals such as stainless steel and high-strength alloys. The cobalt construction provides high heat resistance and extended wear life in demanding applications.
Split-point geometry reduces walking
The 135-degree split point is self-centring, so the bit starts accurately on contact without a centre punch. This saves setup time on a drill press or handheld drill and reduces the risk of damaging the workpiece surface. Because the bit is non-coolant-through with zero coolant holes, the operator must supply cutting fluid externally when drilling deep holes or tough materials to manage heat and chip evacuation.
27/64 inch fractional capacity
The bit creates a hole with a decimal equivalent of .4219 inch, suitable for tapping 1/2-13 threads or clearing specific fastener shanks. Cobalt steel handles high cutting temperatures better than high-speed steel, giving more holes per sharpening in abrasive or work-hardening metals. It is not designed for non-ferrous materials like aluminium or brass where the aggressive split point can grab, nor for coolant-through spindles that require internal fluid delivery.
Highlights
- Cobalt construction resists heat and wear for longer life
- 135° split point starts on contact without walking
- 27/64 in diameter suits precise fractional-inch drilling
- Jobber length gives standard reach for general-purpose work
- Straw bronze finish reduces friction and improves chip flow
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How does the 135-degree split point affect drilling performance in hard materials?
The 135-degree split point centres the bit without a centre punch and reduces walking on hard surfaces such as stainless steel.
Does the cobalt material generate more heat during extended drilling sessions?
Cobalt steel retains hardness at higher temperatures so the bit stays sharp longer under sustained use.
What shank size does the 27/64-inch bit need for my drill chuck?
The jobber-length bit has a straight shank that fits any standard three-jaw chuck accepting 27/64-inch capacity.
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