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Cobalt jobber drill bit with gold TiN coating and split point

Chicago-Latrobe

Chicago-Latrobe 54066 135 Degree Cobalt Jobber Drill Bit

SKU CH-PT73-KFTC9

Cobalt jobber drill bit with a 135-degree split point for accurate drilling in hard metals

  • Product typeDrill Bits
  • Main materialHAWA
  • 135-degree split point starts on contact without wandering
  • Cobalt construction resists heat during heavy-duty drilling
  • TiN coating reduces friction for longer bit life
  • Jobber length handles standard-depth holes in metal
  • 3/8 inch diameter matches common fastener sizes

135° Cobalt Jobber Drill Bit

The Chicago-Latrobe 54066 is a heavy-duty jobber-length drill bit made from cobalt steel with a TiN coating. Its 135-degree split point reduces walking and starts holes cleanly in hard materials. The fractional 3/8-inch size suits general workshop and automotive tasks.

Split Point and TiN Coating

The split-point geometry centres the bit without a centre punch, saving time on repetitive drilling. TiN coating lowers friction and heat, extending edge life when cutting stainless steel or other tough alloys. No coolant holes are present, so external lubrication is recommended for deep holes.

3/8-Inch Fractional Size

This bit measures exactly .3750 inches in diameter, matching standard 3/8-inch fractional specifications. Buyers needing metric diameters or larger fractional sizes will need a different bit. The jobber length provides standard reach for most bench and handheld drilling operations.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 73% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits
Size & build
Main materialHAWA

Questions about this item

How often will the 135-degree split point need resharpening when drilling hard metals?

The cobalt construction and TiN coating resist wear longer than standard high-speed steel, so resharpening intervals are extended under typical jobber-length use.

What limits continuous drilling before the bit overheats?

The 135-degree split point reduces thrust and heat buildup, but the non-coolant-through design means chip evacuation and cutting fluid supply become the practical limits during sustained cuts.

Does the TiN coating change the noise or heat profile during all-day drilling?

The coating lowers friction at the cutting edges, which can slightly reduce generated heat and cutting noise compared with an uncoated cobalt bit of the same geometry.

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