Chicago-Latrobe
Chicago-Latrobe 50740 118 Degree Heavy-Duty Extra Long Drill Bit
Extra long high-speed steel drill bit with a 118-degree notched point for deep-hole drilling up to 9 inches
- Extra-long reach for deep holes with 9 in maximum drilling depth
- 118-degree notched point starts cleanly on contact
- High-speed steel construction resists wear in general-purpose machining
- Black oxide finish reduces friction and chip welding
- 28-degree helix angle clears chips efficiently during deep cuts
Chicago-Latrobe 50740 5/16 Inch Extra Long Drill Bit
This Chicago-Latrobe 50740 drill bit is a heavy-duty cutting tool designed for deep-hole drilling tasks. It features a 5/16 inch fractional size and an extra-long body that achieves a maximum drilling depth of 9 inches. The high-speed steel construction with a black oxide finish provides durability for general-purpose machining applications.
Suited for deep drilling in general-purpose
Machinists and maintenance technicians who need to reach deep cavities in standard ferrous and non-ferrous metals will find this bit suitable. The 118-degree notched point offers reliable starting on flat surfaces. Buyers who require a split point for self-centring on curved stock or a specialised coating for high-temperature alloys should evaluate alternative geometries.
118-degree notched point angle determines start
The 118-degree point angle with a notched profile is the critical specification governing how the bit engages the workpiece. It centres adequately on flat surfaces but lacks the self-centring action of a split-point design. Select this bit when the application matches this specific point geometry.
Highlights
- Extra-long reach for deep holes with 9 in maximum drilling depth
- 118-degree notched point starts cleanly on contact
- High-speed steel construction resists wear in general-purpose machining
- Black oxide finish reduces friction and chip welding
- 28-degree helix angle clears chips efficiently during deep cuts
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
Which drill bit size should I select for a 5/16 inch hole?
Choose the 5/16 inch size listed in the product title; it matches the fractional inch specification for that exact diameter.
What does the 118 degree point angle mean when drilling metal?
The 118 degree point angle with a notched point is designed for general-purpose machining and helps centre the bit quickly in steel and other metals.
How does the straight shank interface limit the maximum drilling depth?
The straight shank fits standard drill chucks, and the flute length allows a maximum drilling depth of 9 inches as specified.
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