Chicago-Latrobe
Chicago-Latrobe 47730 15/32 in 135° Cobalt Jobber Drill Bit
15/32 inch cobalt jobber drill bit with 135-degree split point for hard metals
- TypeDrill Bits
- MaterialHAWA
- Cobalt construction resists heat during heavy drilling
- 135-degree split point starts holes without walking
- 15/32 inch diameter suits large fastener work
- Jobber length provides standard reach and rigidity
- Decimal equivalent .4688 simplifies size matching
Chicago-Latrobe 47730 Cobalt Jobber Bit
The Chicago-Latrobe 47730 is a heavy-duty jobber length drill bit made from cobalt steel. It is designed for drilling tough materials such as stainless steel and high-strength alloys. The 135 degree split point allows for accurate starting without a centre punch. This bit suits professional mechanics and metal fabrication shops.
Installation and common issues
The bit fits any standard drill chuck that accepts a 15/32 inch shank. Insert it fully and tighten the chuck securely to prevent slippage during high-torque drilling. Common problems include overheating if cutting fluid is not used on hard metals. The non-coolant through design requires frequent withdrawal to clear chips and manage heat buildup.
Who this suits and who should look elsewhere
This drill bit suits users who need a durable fractional inch bit for repetitive drilling in hard metals. The cobalt construction resists wear better than high-speed steel in abrasive materials. Buyers who need coolant-fed drilling for deep holes should look elsewhere. Those requiring metric sizes or smaller diameters for precision work will need different tooling.
Highlights
- Cobalt construction resists heat during heavy drilling
- 135-degree split point starts holes without walking
- 15/32 inch diameter suits large fastener work
- Jobber length provides standard reach and rigidity
- Decimal equivalent .4688 simplifies size matching
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How can I confirm the 135 degree split point is cutting correctly after setup?
The 135 degree split point should self-centre and produce short, curly chips in steel without wandering; if the bit walks or creates long stringy swarf, resharpen or replace it.
What comes in the box and what must I supply separately?
The box contains the single 15/32 inch cobalt jobber drill bit; you must supply a compatible drill chuck, cutting fluid if desired, and personal protective equipment.
Which version should I choose when only the 15/32 inch size is listed?
Choose the 15/32 inch version when your hole requirement matches the .4688 decimal equivalent; no other diameters or coatings are offered for this model.
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