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Cobalt jobber drill bit 15/32 inch 135 degree split point straw bronze finish

Chicago-Latrobe

Chicago-Latrobe 47730 15/32 in 135° Cobalt Jobber Drill Bit

SKU CH-SJAG-QR1YZ

15/32 inch cobalt jobber drill bit with 135-degree split point for hard metals

  • Product typeDrill Bits
  • Main materialHAWA
  • Cobalt construction resists heat during heavy drilling
  • 135-degree split point starts holes without walking
  • 15/32 inch diameter suits large fastener work
  • Jobber length provides standard reach and rigidity
  • Decimal equivalent .4688 simplifies size matching

Chicago-Latrobe 47730 Cobalt Jobber Bit

The Chicago-Latrobe 47730 is a heavy-duty jobber length drill bit made from cobalt steel. It is designed for drilling tough materials such as stainless steel and high-strength alloys. The 135 degree split point allows for accurate starting without a centre punch. This bit suits professional mechanics and metal fabrication shops.

Installation and common issues

The bit fits any standard drill chuck that accepts a 15/32 inch shank. Insert it fully and tighten the chuck securely to prevent slippage during high-torque drilling. Common problems include overheating if cutting fluid is not used on hard metals. The non-coolant through design requires frequent withdrawal to clear chips and manage heat buildup.

Who this suits and who should look elsewhere

This drill bit suits users who need a durable fractional inch bit for repetitive drilling in hard metals. The cobalt construction resists wear better than high-speed steel in abrasive materials. Buyers who need coolant-fed drilling for deep holes should look elsewhere. Those requiring metric sizes or smaller diameters for precision work will need different tooling.

How it compares

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

Price $12.99
Cheaper than about 82% 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 can I confirm the 135 degree split point is cutting correctly after setup?

The 135 degree split point should self-centre and produce short, curly chips in steel without wandering; if the bit walks or creates long stringy swarf, resharpen or replace it.

What comes in the box and what must I supply separately?

The box contains the single 15/32 inch cobalt jobber drill bit; you must supply a compatible drill chuck, cutting fluid if desired, and personal protective equipment.

Which version should I choose when only the 15/32 inch size is listed?

Choose the 15/32 inch version when your hole requirement matches the .4688 decimal equivalent; no other diameters or coatings are offered for this model.

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