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Cobalt jobber drill bit, 10.2 mm, straw bronze finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 46489 135° Cobalt Jobber Drill 10.2 mm

SKU CH-V970-8R5MB

A 10.2 mm cobalt jobber drill with a 135-degree split point for hard materials

  • Product typeDrill Bits
  • Main materialHAWA
  • Cobalt construction resists heat for longer bit life
  • 135° split point starts on contact without wandering
  • 2 mm diameter covers common metric fastening tasks
  • Jobber length provides standard reach for general drilling
  • Decimal equivalent .4016 aids quick size identification

Chicago-Latrobe 46489 Cobalt Jobber Drill

The Chicago-Latrobe 46489 is a 10.2 mm cobalt jobber drill bit built for heavy-duty drilling tasks. Its 135-degree split point design promotes accurate starting and reduces walking on hard materials. The straw-bronze finish identifies the cobalt construction. This accessory fits standard drill chucks for professional and industrial use.

Suited for metalworkers drilling tough alloys

This bit suits machinists and maintenance crews who need reliable performance in stainless steel or high-strength steels. The cobalt material resists heat and wear during extended drilling cycles. Buyers who need coolant-through capability for deep-hole drilling should look at a different design. Users requiring a coated bit for non-ferrous metals may prefer an alternative style.

135-degree split point geometry

The 135-degree split point is the specification that determines suitability for hard-metal applications. It centres the bit without a centre punch and lowers thrust requirements. The 10.2 mm diameter and .4016 decimal equivalent define the hole size produced. No coolant holes are present, so external lubrication must be supplied by the operator.

How it compares

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

Price $13.99
Cheaper than about 80% 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 size drill chuck do I need for the 10.2 mm shank?

A chuck that opens to at least 10.2 mm will hold the bit securely; most 13 mm (1/2 inch) capacity chucks are suitable.

Will the 135 degree split point work in a standard variable-speed drill?

Yes, the 135 degree split point is designed for general-purpose drilling and performs well in standard variable-speed drills.

How can I confirm the bit is cutting correctly after I start drilling?

The split point should self-centre without a centre punch, and you should see clean, consistent chips rather than burning or wandering.

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