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Cobalt jobber drill bit, 11.5 mm, split point, straw bronze finish

Chicago-Latrobe

Chicago-Latrobe 46495 11.5 mm Cobalt 135 Deg Jobber Drill Bit

SKU CH-Q779-FJTAG

11.5 mm cobalt jobber drill bit with a 135-degree split point for hard-metal drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • Cobalt steel resists heat for longer tool life
  • 135-degree split point starts holes without wandering
  • 5 mm diameter suits metric drilling tasks
  • Jobber length of 142.00 mm gives standard reach
  • Decimal size .4528 matches precise engineering specs

Drill Bit Size 11.5 mm

This Chicago-Latrobe 46495 jobber drill bit has an 11.5 mm diameter and a 135-degree split point. The cobalt construction is suited for drilling hard metals such as stainless steel. It targets machinists and maintenance technicians who need a durable bit for tough materials.

Upgrade From Standard High-Speed Steel Bits

The cobalt alloy withstands higher temperatures than standard high-speed steel, reducing wear when drilling abrasive alloys. The jump is worth it when a general-purpose bit dulls quickly or walks on hard surfaces. The split point improves centring without a centre punch.

Behaviour Under Sustained Load

Cobalt retains hardness at elevated temperatures generated during extended drilling cycles. The 135-degree point geometry distributes cutting forces to resist chipping during continuous use. The straw bronze finish aids chip evacuation to prevent binding in deep holes. Non-coolant-through design relies on external lubrication for heat management.

How it compares

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

Price $14.99
Cheaper than about 77% 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

Will the 11.5 mm shank fit my standard drill chuck?

The 11.5 mm diameter fits any chuck that opens to at least 11.5 mm; most 13 mm capacity chucks accept it without an adapter.

How do I start a hole with the 135-degree split point without the bit walking?

Apply firm, centred pressure at low speed; the 135-degree split point self-centres, but letting the bit spin before contact is the common mistake that causes walking.

When should I replace this cobalt jobber bit?

Replace it when the cutting lips show visible rounding or the straw/bronze surface colour wears to bare steel, indicating the cobalt edge is gone.

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