Chicago-Latrobe
Chicago-Latrobe 44425 25/64 in 118 Degree Left-Hand Helix Jobber Length Drill
A 25/64 inch high-speed steel jobber drill bit with a 118-degree left-hand helix for removing broken fasteners
- TypeDrill Bits
- MaterialHAWA
- 25/64 inch diameter suits 0.3906 inch clearance holes
- 118-degree conventional point centres quickly in steel and cast iron
- Left-hand helix extracts broken bolts and studs without tightening
- Jobber length provides standard reach for bench and handheld drilling
- Bright high-speed steel resists wear in general-purpose metalwork
Jobber drill bit for general-purpose drilling
The Chicago-Latrobe 44425 is a jobber-length drill bit sized at 25/64 in with a decimal equivalent of .3906 in. It features a 118-degree conventional point and a left-hand helix made from high-speed steel. The bright, uncoated finish suits general-purpose drilling in a range of materials.
Fits standard chucks and frees right-hand fastener
The bit uses a straight shank that fits common drill chucks without extra adapters. Its left-hand helix design allows the bit to back out when run in reverse, which helps free stuck right-hand fasteners or broken studs. No coolant holes are present, so external lubrication is used when needed.
Suits mechanics and machinists needing left-hand
This bit suits mechanics and machinists who need left-hand cutting action for extractor work or reverse drilling tasks. It is not for buyers who require coolant-through capability or a coated bit for high-heat production runs. Builders needing right-hand helix bits for standard forward drilling should look at something else.
Highlights
- 25/64 inch diameter suits 0.3906 inch clearance holes
- 118-degree conventional point centres quickly in steel and cast iron
- Left-hand helix extracts broken bolts and studs without tightening
- Jobber length provides standard reach for bench and handheld drilling
- Bright high-speed steel resists wear in general-purpose metalwork
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
Will the 118-degree point angle hold up when drilling through hardened steel all day?
The 118-degree conventional point is designed for general-purpose drilling in mild steel and softer materials; sustained use in hardened steel will dull the edge faster than a split-point or cobalt bit.
Does the bright uncoated finish run hotter or louder than a coated bit during continuous drilling?
The uncoated high-speed steel surface generates more friction heat than oxide or nitride coatings, so cutting fluid and slower feed rates are recommended for long sessions.
What shank size must my drill chuck accept for this 25/64-inch jobber-length bit?
The bit has a straight shank matching its 25/64-inch (0.3906 decimal) diameter, so a 3/8-inch or larger three-jaw chuck is required.
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