Chicago-Latrobe
Chicago-Latrobe 47725 135 Degree Cobalt Jobber Drill Bit 25/64 in
Cobalt jobber drill bit with a 135-degree split point for 25/64 inch holes
- TypeDrill Bits
- MaterialHAWA
- Cobalt steel resists heat during heavy-duty drilling
- 135-degree split point starts on contact without walking
- 25/64 inch diameter matches precise fractional sizing
- Jobber length provides standard reach for general use
- Straw bronze finish identifies genuine cobalt construction
Chicago-Latrobe 47725 Cobalt Jobber Bit
The Chicago-Latrobe 47725 is a 135-degree split-point jobber drill bit made from cobalt steel. It has a 25/64 inch fractional diameter with a .3906 decimal equivalent. The straw bronze finish identifies the heat-treated HAWA material. This accessory targets metalworking tasks in automotive and general maintenance.
Suited for hard-metal drilling.
The 135-degree point and cobalt construction suit mechanics and fabricators drilling stainless steel, cast iron or other abrasive alloys where high-speed steel dulls quickly. The split point reduces walking on hard surfaces. Buyers who need through-coolant capability or a different diameter should look at something else.
Fits standard chucks; frees up cutting speed
The straight shank fits common three-jaw drill chucks without adapters. Cobalt hardness lets the bit run at higher speeds in tough alloys, reducing cycle time per hole. The jobber length reaches standard depths in plate or structural sections. No coolant holes means external lubrication must be supplied by the operator.
Highlights
- Cobalt steel resists heat during heavy-duty drilling
- 135-degree split point starts on contact without walking
- 25/64 inch diameter matches precise fractional sizing
- Jobber length provides standard reach for general use
- Straw bronze finish identifies genuine cobalt construction
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Does the 135 degree split point start accurately on hard metals without a centre punch?
Yes, the 135 degree split point is designed to self-centre and reduce walking on tough materials such as stainless steel.
Will the 25/64 inch shank fit a standard 3/8 inch drill chuck?
The 25/64 inch diameter is 0.3906 inch, which exceeds a 3/8 inch chuck capacity; a 1/2 inch or larger chuck is required.
How can I confirm the cobalt bit is cutting correctly after the first hole?
A clean, round hole with minimal burr and consistent chip formation shows the 135 degree point is performing as intended.
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