Chicago-Latrobe
Chicago-Latrobe 50821 Screw Machine Drill Bit 3/8 in 135° Split Point Cobalt
Cobalt screw-machine bit with 135° split point drills 3/8 in holes in hard metals
- TypeDrill Bits
- 3/8 in cobalt construction resists heat and wear
- 135° split point starts on contact without walking
- Right-hand cutting clears chips efficiently in machine use
- .3750 decimal equivalent ensures precise hole sizing
- Screw machine length suits high-speed production drilling
Chicago-Latrobe 50821 Cobalt Drill Bit
The Chicago-Latrobe 50821 is a screw machine drill bit built from cobalt steel for hardness and heat resistance. It targets machinists and maintenance technicians who need a durable bit for drilling tough alloys and stainless steel. The 135 degree split point reduces walking and lowers thrust requirements during operation. This right-hand cutting tool is designed for standard drilling applications.
Check Shank Fit and Material Compatibility
Verify that your drill chuck or collet accepts a straight shank with a decimal equivalent of .3750 before ordering. Confirm the workpiece material suits cobalt tooling; this bit excels in high-tensile steels but is not intended for soft non-ferrous metals or wood. Ensure your machine delivers right-hand rotation and that coolant strategy matches the non-coolant-through design.
Upgrade From General-Purpose Bits
This bit replaces standard high-speed steel twist drills when tool life and hole accuracy in hard metals become critical. The jump is worth it when frequent resharpening of lesser bits slows production or when work hardening causes premature failure. It is not for buyers who need coolant-fed drilling or left-hand cutting direction.
Highlights
- 3/8 in cobalt construction resists heat and wear
- 135° split point starts on contact without walking
- Right-hand cutting clears chips efficiently in machine use
- .3750 decimal equivalent ensures precise hole sizing
- Screw machine length suits high-speed production drilling
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
Does the Chicago-Latrobe 50821 3/8 in cobalt drill bit come as a single bit or in a set, and is a drill chuck included?
The item is a single screw-machine drill bit; a drill chuck or driver is not included and must be supplied separately.
Should I choose the 3/8 in cobalt split-point version or a different size for general metal drilling?
The 3/8 in (0.3750 decimal) cobalt bit with 135° split point is designed for drilling hard metals such as stainless steel; select a different diameter only if the hole size must change.
How does the 135° split-point geometry affect drilling performance in a handheld drill?
The 135° split point reduces walking, starts holes faster and lowers thrust force, making the bit easier to control in a handheld drill when cutting tough alloys.
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