We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Cobalt jobber drill bit, split point, gold TiN finish

Chicago-Latrobe

Chicago-Latrobe 54118 135° Cobalt Jobber Drill Bit .3480

SKU CH-BCM2-7YWFD

A 135-degree split-point cobalt jobber drill bit with TiN coating for precise drilling at .3480 inch diameter

  • TypeDrill Bits
  • 135° split point starts drilling instantly without walking
  • Cobalt steel with TiN coating resists heat and wear on hard metals
  • Jobber length gives standard reach for general-purpose drilling
  • Letter S size (.3480) matches precise hole specifications
  • Heavy-duty construction handles demanding shop applications

Chicago-Latrobe 54118 Cobalt Drill Bit

The Chicago-Latrobe 54118 is a heavy-duty jobber length drill bit manufactured from cobalt steel with a titanium nitride coating. It is designed for professional mechanics and metalworkers who require a durable cutting tool for drilling hard materials such as stainless steel and high-strength alloys.

135 Degree Split Point for Precision Starts

The 135 degree split point geometry allows the bit to self-center on contact, reducing the need for a centre punch and minimising walk on curved or hard surfaces. This point configuration frees up workflow by enabling faster, more accurate hole placement without additional layout steps or pilot drilling operations.

Upgrade from Standard High-Speed Steel Bits

This cobalt bit replaces general-purpose high-speed steel drills when tool life and heat resistance become critical factors. The jump is worth it for repetitive drilling in abrasive or work-hardening metals where standard bits dull quickly, though it is not for buyers who only drill wood, plastic or soft aluminium.

Highlights

  • 135° split point starts drilling instantly without walking
  • Cobalt steel with TiN coating resists heat and wear on hard metals
  • Jobber length gives standard reach for general-purpose drilling
  • Letter S size (.3480) matches precise hole specifications
  • Heavy-duty construction handles demanding shop applications

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits

Questions about this item

How does the 135-degree split point handle heat during extended drilling?

The 135-degree split point reduces thrust and generates less heat compared to standard points, helping maintain cutting efficiency during prolonged use.

Does the TiN coating on this cobalt bit reduce friction and heat buildup when running continuously?

Yes, the TiN coating lowers friction and improves wear resistance, which helps manage heat during all-day operation.

What chuck size is required to hold the .3480 diameter shank of this jobber bit?

A drill chuck capable of gripping a 0.3480-inch shank is needed; most standard 3/8-inch or 1/2-inch keyed or keyless chucks will accept this size.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.