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Silver cobalt steel jobber drill bit, split point, 135 degree angle

Chicago-Latrobe

Chicago-Latrobe 44970 Jobber Drill Bit Z Cobalt Steel

SKU CH-BA3R-MEH35

Jobber drill bit in size Z with 135-degree split point, cobalt steel construction and TiAlN coating for precise drilling in hard materials

  • Product typeDrill Bits
  • Main materialHAWA
  • Split-point geometry starts holes accurately
  • 135° point angle reduces walking on hard materials
  • Cobalt steel resists heat during high-speed drilling
  • TiAlN coating extends tool life in tough alloys

Chicago-Latrobe 44970 Cobalt Jobber Drill Bit

This cobalt steel jobber drill bit is sized to letter Z with a decimal equivalent of .4130 inches. It is built for professionals who need a durable cutting tool for drilling hard metals such as stainless steel and high-strength alloys. The split point design with a 135 degree angle allows for accurate starting without a centre punch. The TiAlN coating adds wear resistance and helps reduce heat buildup during extended use.

Capacity and headroom for the Z size bit

The .4130 inch diameter handles precise hole-making in tough materials where standard high-speed steel bits would wear quickly. Cobalt construction maintains hardness at higher temperatures, giving it an edge in stainless steel, titanium and nickel-based alloys. The jobber length provides standard reach for general machine and hand-held drilling. It is not suited for deep-hole applications requiring extra-long flute length or for non-ferrous materials where a polished flute would clear chips more efficiently.

How it compares

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

Price $25.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

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

Questions about this item

Will the 135-degree split point on this jobber bit engage cleanly in the existing pilot holes I drill with standard twist bits?

The 135-degree split point is designed to self-centre and reduce walking on hard materials, so it tracks accurately in pre-drilled holes without the wander common with standard points.

How can I confirm the Z-size cobalt bit is cutting correctly once installed in my drill press?

Check that the .4130 decimal diameter matches your specification, then observe a clean, chatter-free cut with consistent chip formation and no blueing on the cobalt steel flutes.

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