Chicago-Latrobe
Chicago-Latrobe 43631 31/64 in 135° Split-Point Drill Bit
A 31/64 in jobber length drill bit with a 135° split point for accurate starts in metal
- TypeDrill Bits
- MaterialHAWA
- 31/64 inch size matches exact fractional requirements
- 135-degree split point starts on contact without wandering
- High-speed steel with TiCN coating resists heat and wear
- Jobber length gives standard reach for general drilling
- Decimal equivalent 0.4844 simplifies metric conversion
Chicago-Latrobe 43631 Jobber Drill Bit
This Chicago-Latrobe 43631 is a jobber-length drill bit made from high-speed steel with a TiCN coating. It features a 135-degree split-point tip designed for accurate starting and reduced walking. The fractional size is 31/64 inch with a decimal equivalent of .4844 inches. It is a non-coolant-through tool with zero coolant holes.
Suited for general-purpose drilling in metal
The split-point geometry and TiCN coating suit users drilling steel, cast iron or non-ferrous alloys where heat resistance and tool life matter. Builders who need coolant-fed drilling for deep holes or high-volume production should look at coolant-through alternatives. The fractional sizing fits standard imperial tooling requirements.
31/64 inch diameter with 135-degree split point
The 31/64 inch cutting diameter determines the hole size this bit produces. The 135-degree split-point angle controls self-centering behaviour and chip formation in harder materials. Verify that your chuck capacity and workpiece thickness match the jobber-length format before purchase.
Highlights
- 31/64 inch size matches exact fractional requirements
- 135-degree split point starts on contact without wandering
- High-speed steel with TiCN coating resists heat and wear
- Jobber length gives standard reach for general drilling
- Decimal equivalent 0.4844 simplifies metric conversion
Specifications
| Brand | CHICAGO-LATROBE |
|---|---|
| Type | Drill Bits |
| Material | HAWA |
Questions about this item
How deep can the 31/64 in jobber-length flute drill before chip packing becomes the limiting factor?
The jobber-length flute on the 31/64 in bit provides standard reach for general-purpose drilling; chip evacuation remains effective until the flutes fill, at which point the bit must be withdrawn to clear swarf.
Does the TiCN-coated high-speed steel bit run hotter or louder than an uncoated bit during all-day production drilling?
TiCN coating reduces friction and heat buildup compared with uncoated high-speed steel, so the bit runs cooler and with no increase in noise during extended drilling cycles.
What shank style does the 43631 bit have so I know whether my drill chuck will accept it?
The 43631 features a straight round shank that fits any standard three-jaw drill chuck sized for 1/2 in capacity or larger.
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