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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

  • TypeDrill Bits
  • 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.

Highlights

  • 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

Specifications

BrandCHICAGO-LATROBE
TypeDrill Bits
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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