Chicago-Latrobe
Chicago-Latrobe 44424 3/8 in 118° Left-Hand Helix Jobber Drill Bit
3/8 inch high-speed steel jobber drill bit with 118-degree left-hand helix point for reverse drilling
- TypeDrill Bits
- MaterialHAWA
- Left-hand helix removes broken fasteners with reverse rotation
- 118° conventional point starts cleanly in steel and cast iron
- High-speed steel body resists wear during repeated drilling
- Bright uncoated finish allows easy inspection of cutting edges
- 3/8 in fractional size fits standard jobber-length chucks
Jobber Length 3/8 Inch Drill Bit
This Chicago-Latrobe 44424 jobber length drill bit measures 3/8 inch with a 118 degree point angle. It is made from high speed steel with a bright uncoated finish. The left hand helix design suits specific machining requirements. The decimal equivalent is .3750 inches.
Suits Left Hand Helix Applications
Machinists needing a left hand helix for reverse rotation tasks will find this bit appropriate. The conventional point works in standard drilling operations without coolant through holes. Buyers requiring coolant fed drilling or coated bits for extended wear should look at other designs. The fractional inch sizing fits imperial tooling systems.
High Speed Steel Capacity
The high speed steel construction handles general purpose drilling in metal, wood and plastic. The 118 degree point provides reliable centering in softer materials. The bright finish offers no thermal barrier so heat builds faster in hard alloys or deep holes. The jobber length gives standard reach for typical workshop tasks.
Highlights
- Left-hand helix removes broken fasteners with reverse rotation
- 118° conventional point starts cleanly in steel and cast iron
- High-speed steel body resists wear during repeated drilling
- Bright uncoated finish allows easy inspection of cutting edges
- 3/8 in fractional size fits standard jobber-length chucks
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
What size drill chuck is needed to hold the 3/8 inch shank on the 44424 bit?
A chuck that opens to at least 3/8 inch (0.3750 decimal) will grip the shank securely.
Can the left-hand helix on the 44424 bit be used in a standard right-hand drill motor?
No, the left-hand helix requires a drill or driver that runs in reverse (counter-clockwise) to cut correctly.
How can I verify the 118 degree point angle is cutting properly after I start drilling?
The bit should produce clean, continuous chips and a round hole at the 0.3750 diameter without wandering or excessive heat.
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