Chicago-Latrobe
Chicago-Latrobe 50846 Screw Machine Drill Bit Q Size 135° Split Point Cobalt
Cobalt screw-machine drill bit with a 135° split point for self-centering starts in hard metals
- TypeDrill Bits
- 135° split point starts on contact without wandering
- Cobalt construction resists heat for longer cutting life
- Screw-machine length fits tight spaces in production runs
- Right-hand cut clears chips efficiently in standard drills
- Decimal equivalent .3320 matches Q-size specifications exactly
Precision drilling with cobalt construction
The Chicago-Latrobe 50846 is a screw-machine drill bit made from cobalt steel for hardness and heat resistance. It targets machinists and maintenance technicians who need accurate holes in tough alloys. The split-point tip reduces walking on hard surfaces. This bit suits production runs where tool life matters.
Consistent cutting under sustained load
Cobalt material keeps its edge longer than high-speed steel when feed rates stay high. The 135-degree split point centres the cut without a centre punch, lowering thrust force during extended cycles. Right-hand cutting direction matches standard machine spindles. Non-coolant-through design means chips clear through the flutes alone.
Q size with .3320 decimal equivalent
The single specification that decides fit is the Q letter size, which equals a .3320 inch diameter. No other diameter or metric conversion is supplied. Buyers needing a different letter size or a tighter tolerance class must select another bit.
Highlights
- 135° split point starts on contact without wandering
- Cobalt construction resists heat for longer cutting life
- Screw-machine length fits tight spaces in production runs
- Right-hand cut clears chips efficiently in standard drills
- Decimal equivalent .3320 matches Q-size specifications exactly
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
Questions about this item
How much heat does the cobalt material generate during extended drilling sessions?
Cobalt construction resists heat buildup better than standard high-speed steel, maintaining hardness at higher temperatures.
What chuck size is needed to hold the 0.3320 inch shank?
A drill chuck with at least 3/8 inch capacity will grip the 0.3320 inch shank securely.
Will the 135 degree split point start cleanly on hardened steel that older bits struggle with?
The 135 degree split point reduces walking and provides faster penetration in tough materials including hardened steel.
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