Chicago-Latrobe
Chicago-Latrobe 50835 Cobalt Screw Machine Drill Bit, F Size, 135° Point
Cobalt steel drill bit with a 135° split point for fast, accurate starts in hard metals
- TypeDrill Bits
- MaterialCobalt Steel
- Cobalt steel withstands high heat during drilling
- 135° split point reduces walking on hard materials
- Right-hand cutting clears chips efficiently
- Straw finish identifies cobalt composition
- Decimal size .2570 matches F letter drill standard
Cobalt Screw Machine Drill Bit
The Chicago-Latrobe 50835 is a screw machine drill bit made from cobalt steel. It features an F size diameter with a decimal equivalent of 0.2570 inches. The 135-degree split point is designed for self-centering and reduced walking. This bit suits metalworking tasks requiring heat resistance and durability.
Right-Hand Cutting and Split Point
The bit uses a right-hand cutting direction compatible with standard drill chucks. Its split point geometry helps start holes accurately without a centre punch. The straw finish indicates the cobalt heat treatment but offers no added lubricity. Ensure the workpiece is clamped securely to prevent the bit from grabbing in thin material.
Metalworkers Needing Cobalt Heat Resistance
This drill bit targets users drilling stainless steel or other hard alloys where high-speed steel wears quickly. It is not suited for buyers who need coolant-through capability for deep-hole drilling. Builders requiring coated bits for extended life in abrasive materials should look elsewhere. The non-coolant design limits use in high-volume production.
Highlights
- Cobalt steel withstands high heat during drilling
- 135° split point reduces walking on hard materials
- Right-hand cutting clears chips efficiently
- Straw finish identifies cobalt composition
- Decimal size .2570 matches F letter drill standard
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | Cobalt Steel |
Questions about this item
How do I confirm the 135-degree split point is cutting correctly after I start drilling?
The 135-degree split point should self-centre and produce short, curled chips in steel without walking; if the bit grabs or creates long stringy chips, the point may be dull or the feed pressure is wrong.
What comes in the package and do I need to buy anything else to use this cobalt bit?
The package contains the single F-size cobalt screw-machine drill bit, decimal equivalent .2570, right-hand cut, non-coolant-through; no extra accessories are required, just a compatible drill chuck.
When should I choose the F-size .2570 cobalt bit instead of another size or material?
Choose this F-size .2570 cobalt bit when the job calls for that exact fractional diameter in hard metals such as stainless or tool steel where cobalt’s heat resistance outperforms high-speed steel.
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