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Chicago-Latrobe 45631 31/64 inch HSS jobber drill bit with black oxide finish

Chicago-Latrobe

Chicago-Latrobe 45631 31/64" HSS 135° Jobber Drill Bit

SKU CH-GE16-GR6A1

A 31/64 inch high-speed steel jobber drill bit with a 135-degree split point for accurate starts

  • TypeDrill Bits
  • MaterialHAWA
  • Precise 31/64" holes with 135° split point
  • High-speed steel construction resists wear and heat
  • Black oxide finish reduces friction and corrosion
  • Jobber length suits general-purpose drilling tasks

Chicago-Latrobe 45631 Jobber Drill Bit

The Chicago-Latrobe 45631 is a fractional jobber length drill bit made from high speed steel with a black oxide finish. It features a 135 degree split point designed for accurate starting and reduced walking in metal applications. The bit measures 31/64 inch, equivalent to .4844 inches decimal. It suits professional mechanics and maintenance technicians requiring reliable hole drilling.

Capacity and headroom for 31/64 inch drilling

This bit comfortably handles general purpose drilling in steel, cast iron and non-ferrous metals where a 31/64 inch hole is specified. The high speed steel construction provides adequate wear resistance for repetitive production tasks. It runs out when the application demands cobalt or carbide substrate for hardened alloys or high temperature operations. The jobber length limits reach in deep hole scenarios.

Highlights

  • Precise 31/64" holes with 135° split point
  • High-speed steel construction resists wear and heat
  • Black oxide finish reduces friction and corrosion
  • Jobber length suits general-purpose drilling tasks

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits
MaterialHAWA

Questions about this item

Will the 31/64" 135° split point bit work in my older 1/2" capacity drill chuck?

Yes, the straight shank on this jobber length bit fits any standard 1/2" three-jaw chuck, so it mounts securely in older drill presses and handheld drills alike.

How can I confirm the 135° split point is cutting correctly after I start drilling?

The split point should self-centre immediately without a centre punch, produce short curled chips in steel, and the hole diameter will measure .4844" when checked with a gauge.

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