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Cylindrical cobalt jobber drill bit, 12.5 mm, straw bronze finish, split point tip

Chicago-Latrobe

Chicago-Latrobe 46498 12.5 mm Cobalt Jobber Drill Bit

SKU CH-HW2D-T9JMK

A 12.5 mm cobalt jobber drill bit with a 135-degree split point for hard-metal drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • Cobalt steel resists heat during heavy drilling
  • 135-degree split point starts holes without wandering
  • 5 mm diameter suits metric fastener work
  • Jobber length gives standard reach for general use
  • Straw bronze finish identifies cobalt construction

Chicago-Latrobe 46498 Cobalt Drill Bit

This 12.5 mm cobalt jobber drill bit carries the Chicago-Latrobe name and is built for heavy-duty drilling tasks. The 135-degree split-point tip is designed to reduce walking and improve penetration in tough alloys. Its straw-bronze surface identifies the cobalt construction. The decimal equivalent is .4921 inch.

Suited for metalworkers needing a durable metric bit

Machinists and maintenance technicians who require a reliable 12.5 mm bit for stainless steel or high-strength alloys will find this tool appropriate. It is not intended for woodworking, masonry or plastics where specialised geometries are required. Buyers needing coolant-through capability or a different point angle should consider other options.

135-degree split-point geometry decides

The 135-degree split-point angle is the single specification that determines whether this bit matches the material and drilling conditions. This geometry centres the bit without a centre punch and efficiently cuts hard metals. Verify that your application calls for this specific point configuration before purchasing.

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

How long can the 12.5 mm cobalt drill bit run before heat dulls the 135-degree split point?

Cobalt steel resists heat buildup during extended drilling in hard metals, keeping the 135-degree split point sharp longer than standard high-speed steel under sustained use.

Does the 12.5 mm cobalt bit generate noticeable noise or heat when drilling all day in a workshop?

The bit itself produces only normal drilling sound; heat stays in the workpiece, not the shank, so the tool remains comfortable to handle during long sessions.

What chuck size must I already own to use the 12.5 mm jobber-length drill bit?

A drill chuck that opens to at least 12.5 mm (0.4921 in) is required to grip the straight shank of this jobber-length bit.

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