Chicago-Latrobe
Chicago-Latrobe 50596 118 Degree Heavy-Duty Extra Long Drill Bit
Extra-long 118-degree high-speed steel drill bit with notched point and black oxide finish for general-purpose machining
- 9 in maximum drilling depth for deep-hole applications
- 118-degree notched point angle improves centering and reduces walking
- High-speed steel construction with black oxide finish resists wear and corrosion
- 28-degree helix angle supports efficient chip evacuation
- Extra-long 4xD design reaches confined or deep work areas
Chicago-Latrobe 50596 118° Extra Long Bit
The Chicago-Latrobe 50596 is a high-speed steel drill bit with a 118-degree notched point and black oxide finish. It is designed for general-purpose machining tasks requiring extended reach. The fractional inch sizing suits standard imperial tooling setups.
Straight shank fits standard chucks without adapters
The straight shank allows direct insertion into common drill chucks, reducing setup time. The 118-degree point angle centres easily on flat surfaces but may wander on curved or hardened materials without a pilot mark. Chip evacuation can slow in deep holes if the flutes are not cleared periodically during operation.
Black oxide coating resists wear during sustained
The black oxide surface treatment helps retain lubricity and reduces galling when drilling at consistent feed rates over long periods. Heat builds gradually in the 9-inch flute length, so intermittent withdrawal aids cooling. The 28-degree helix angle supports steady chip flow without binding during continuous use.
Highlights
- 9 in maximum drilling depth for deep-hole applications
- 118-degree notched point angle improves centering and reduces walking
- High-speed steel construction with black oxide finish resists wear and corrosion
- 28-degree helix angle supports efficient chip evacuation
- Extra-long 4xD design reaches confined or deep work areas
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
How do I verify the 118 degree point angle is cutting correctly after setup?
The notched point should start on contact and produce even chips at the 28 degree helix; a clean, round 9/16 in hole to the full 9 in depth confirms proper geometry.
What comes in the box and is anything else required to use the 50596 bit?
The package contains the single extra-long high-speed steel bit with black oxide finish; a compatible 1/2 in or larger drill chuck is needed but not included.
When should I choose the 9/16 in fractional size over other diameters in this series?
Select the 9/16 in version when the finished hole must be exactly that diameter for bolt clearance or tapping; the 4xD length and 118 degree angle suit general-purpose machining in steel and cast iron.
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