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Cobalt jobber drill bit, 17/64 inch, straw bronze finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 47717 135° Cobalt Jobber Drill Bit 17/64 in

SKU CH-C7AE-DXBT6

A 17/64 inch cobalt jobber drill bit with a 135 degree split point for hard materials

  • Product typeDrill Bits
  • Main materialHAWA
  • 135° split point starts on contact without wandering
  • Cobalt steel resists heat when drilling hard metals
  • 17/64 in fractional size fits standard jobber chucks
  • 2656 in decimal equivalent simplifies tap selection
  • Jobber length gives reach for general-purpose drilling

Chicago-Latrobe 47717 Cobalt Jobber Drill Bit

This Chicago-Latrobe 47717 is a cobalt jobber drill bit designed for drilling hard metals. It suits professional mechanics and metalworkers who need reliable performance in tough materials. The heavy-duty construction handles demanding workshop tasks.

Suited for hard-metal drilling, not soft materials

The 135-degree split point starts cleanly in stainless steel and alloys without walking. Builders who mainly drill wood, plastic or soft aluminium should look at standard high-speed steel bits instead. This bit has no coolant holes for through-coolant systems.

17/64 inch diameter with .2656 decimal equivalent

The fractional 17/64 inch size matches the exact hole diameter required for specific fastener or tap drill charts. Verify the decimal equivalent .2656 against your drawing before ordering. The jobber length provides standard reach for general-purpose drilling.

How it compares

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

Price $4.99
Cheaper than about 95% 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 do I install the 17/64 inch cobalt jobber bit in my drill chuck, and what step is often missed?

Open the chuck jaws wide enough for the 0.2656 inch shank, insert the bit fully, then tighten securely; the step often missed is verifying the split point seats straight so the 135 degree angle cuts true.

What maintenance or replacement will the 47717 cobalt drill bit need after extended use?

The cobalt material resists heat but the split point will dull; resharpen the 135 degree angle on a proper grinder or replace the bit when the cutting edges no longer produce clean chips.

What limit appears first when drilling continuously with this 135 degree split-point bit?

Heat buildup at the cutting edges is the first limit; without coolant holes the straw/bronze surface can overheat, reducing hardness and causing the 0.2656 inch diameter to cut slower.

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