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Cobalt jobber drill bit, straw-bronze finish, split point

Chicago-Latrobe

Chicago-Latrobe 47728 135 Degree Cobalt Jobber Drill Bit

SKU CH-MVGG-YYFZT

A 7/16-inch cobalt jobber drill bit with a 135-degree split point for heavy-duty drilling

  • Product typeDrill Bits
  • Main materialHAWA
  • 135-degree split point starts on contact without walking
  • Cobalt HAWA material resists heat during heavy-duty drilling
  • Jobber length gives standard reach for general use
  • 7/16 in fractional size matches common fastener needs
  • Decimal equivalent .4375 simplifies specification matching

Chicago-Latrobe 47728 Jobber Drill Bit

This Chicago-Latrobe 47728 drill bit is a jobber-length cutting tool made from cobalt material for general-purpose drilling tasks. It features a 135-degree split point designed to reduce walking and improve starting accuracy on metal surfaces. The straw/bronze finish identifies the heavy-duty construction intended for workshop use.

Suited for metalworkers needing a 7/16 inch

Machinists and maintenance technicians drilling mild steel or stainless materials will find the cobalt composition and split-point geometry appropriate. Builders who need coolant-through capability or a different point angle for specialised alloys should look at other options.

Critical spec: 135-degree split point on cobalt

The 135-degree split point combined with cobalt material determines whether this bit matches the hardness and self-centering requirements of the job. Verify the 0.4375 decimal equivalent fits the required hole size before purchase.

How it compares

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

Price $11.99
Cheaper than about 84% 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 does the 135-degree split point affect drilling in hard metals?

The 135-degree split point centres itself on contact and reduces walking, so it starts cleanly in cobalt-hardened steels without a centre punch.

What does the jobber-length shank limit when used in a standard drill chuck?

The jobber-length shank fits any 3-jaw chuck that accepts straight shanks up to 7/16 in, capping the maximum bit diameter the chuck can hold.

What clearance is needed behind the chuck for the 7/16-inch jobber bit?

The bit extends roughly 16 times its diameter from the chuck face, so allow at least 7 in of spindle travel and workpiece clearance.

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