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Cobalt jobber drill bit, 135-degree split point, straw-bronze finish

Chicago-Latrobe

Chicago-Latrobe 46789 135 Degree Cobalt Jobber Drill Bit

SKU CH-ZDEY-KP8R6

A 135-degree split-point cobalt jobber drill bit with a .3480 decimal equivalent for heavy-duty drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • 135-degree split point reduces walking on hard metals
  • Cobalt construction resists heat during heavy-duty drilling
  • Jobber length fits standard chucks for versatile use
  • Straw bronze finish identifies cobalt grade at a glance
  • Model 46789 ensures correct reorder for workshops

Chicago-Latrobe 46789 135° Cobalt Jobber Drill Bit

The Chicago-Latrobe 46789 is a heavy-duty jobber length drill bit made from HAWA cobalt material. It features a 135 degree split point design for accurate starting without a centre punch. The straw bronze finish identifies the cobalt construction. This bit is built for demanding drilling tasks in tough materials.

Ideal for machinists drilling hard metals like

Suited for professionals needing a durable cobalt bit with a 135 degree split point for hard metal drilling. The jobber length provides standard reach for general machine work. Not for buyers needing coolant-through capability as this bit has zero coolant holes. Avoid if your application requires a coated or carbide tip instead of cobalt.

135 degree split point geometry

The 135 degree split point angle is the critical specification determining suitability for hard materials like stainless steel. This geometry reduces thrust and prevents walking on contact. The decimal equivalent size is .3480 inches, designated as letter size S. Confirm this exact diameter matches your hole requirement before purchase.

How it compares

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

Price $9.99
Cheaper than about 88% 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

What does the 135 degree point angle mean for drilling performance?

The 135 degree split point reduces walking and starts drilling on contact, making it suitable for harder materials such as stainless steel.

What shank size does the 46789 drill bit have for my chuck?

The jobber length bit has a straight shank matching its .3480 inch diameter, fitting standard three-jaw chucks that accept that size.

How do I use a cobalt split-point bit without dulling it quickly?

Run the drill at lower RPM with steady pressure and cutting oil; let the split point self-centre rather than forcing the bit into the workpiece.

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