Chicago-Latrobe
Chicago-Latrobe 47273 4.2 mm 118° Jobber Drill Bit
A 4.2 mm high-speed steel jobber drill bit with a 118° conventional point and black oxide finish
- TypeDrill Bits
- MaterialHAWA
- 2 mm diameter drills precise metric holes
- 118° point angle centres quickly in steel
- High-speed steel body resists wear in daily use
- Black oxide finish reduces friction and corrosion
- Jobber length reaches deep workpieces without changing bits
4.2 mm jobber drill bit
This Chicago-Latrobe drill bit is a general-purpose cutting tool designed for metalworking tasks. The 4.2 mm diameter suits standard metric tapping and clearance drilling. Its jobber length provides a balanced reach for typical workshop and maintenance applications. The conventional point geometry allows reliable starting on flat surfaces.
Sustained cutting with black oxide finish
The high-speed steel construction resists heat buildup during extended drilling cycles. A black oxide surface treatment helps retain lubricant and reduces friction compared to bright finishes. The 118-degree point angle distributes cutting forces evenly across the lips. This combination supports consistent chip evacuation and tool life in repetitive operations.
Upgrade from worn or undersized bits
This bit replaces dull, damaged, or incorrectly sized jobber drills in a machinist's index. The jump is worthwhile when hole tolerance or surface finish degrades on current tooling. The metric sizing eliminates conversion errors common with fractional substitutes. Buyers needing coolant-through capability or specialised coatings for exotic alloys should look elsewhere.
Highlights
- 2 mm diameter drills precise metric holes
- 118° point angle centres quickly in steel
- High-speed steel body resists wear in daily use
- Black oxide finish reduces friction and corrosion
- Jobber length reaches deep workpieces without changing bits
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How much heat does the 4.2 mm drill bit generate when running all day in steel?
The 118-degree conventional point and high-speed steel construction are designed for general-purpose drilling, and the black oxide finish helps reduce friction and heat buildup during extended use.
What shank size or chuck capacity is needed to hold the 4.2 mm drill bit?
The 4.2 mm jobber-length bit has a straight shank that fits standard three-jaw drill chucks capable of gripping 4.2 mm or 0.1654 inch diameters.
Will the 47273 bit work in an older drill press with a 1/2 inch chuck?
Yes, the 4.2 mm straight shank fits any 1/2 inch or larger drill chuck, so it operates normally on older drill presses and handheld drills alike.
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