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Cobalt drill bit, 39/64 inch, straw bronze finish, 135 degree split point

Chicago-Latrobe

Chicago-Latrobe 50081 135 Degree Heavy-Duty Cobalt Jobber Length Drill 39/64 in

SKU CH-KG7X-QCDWX

A 39/64 inch cobalt jobber drill bit with a 135 degree split point for heavy-duty drilling in hard materials

  • Product typeDrill Bits
  • 135° split point starts on contact without walking
  • Cobalt steel resists heat during heavy-duty drilling
  • 39/64 in fractional size equals .6094 in decimal
  • Jobber length suits general-purpose machine work
  • New CHICAGO-LATROBE 50081 bit ready for use

Chicago-Latrobe 50081 Cobalt Drill Bit

The Chicago-Latrobe 50081 is a jobber-length drill bit made from cobalt steel with a 135-degree split point. It is sized at 39/64 inch, which equals 0.6094 inch decimal equivalent. The straw/bronze finish identifies the material. This accessory is built for general-purpose drilling in metal.

Suited for metalworkers drilling 39/64 inch holes

Machinists and maintenance technicians who need a single cobalt bit for stainless steel or high-tensile alloys will find this size useful. The split point helps start holes without a centre punch. Buyers who need a different diameter, a longer series, or a coated bit should look elsewhere. Sets or multi-packs are not represented by this listing.

39/64 inch diameter decides fit

The 39/64 inch fractional size is the critical specification that determines whether this bit matches the required hole. Verify the decimal equivalent of 0.6094 inch against your drawing or tap chart before ordering. No other dimension in the data changes compatibility.

How it compares

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

Price $43.99
Pricier than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCHICAGO-LATROBE
Product typeDrill Bits

Questions about this item

Will the 135-degree split point reduce the force needed when drilling through hardened steel all day?

The 135-degree split point is designed to start on contact and reduce walking, which lowers the feed pressure required during extended drilling in tough materials.

Does the 39/64-inch shank fit a standard 1/2-inch drill chuck without an adapter?

The decimal equivalent is .6094 inch, which exceeds a 1/2-inch chuck capacity, so a larger chuck or a reduced-shank bit is required.

Can the cobalt construction handle the higher heat generated by an older lower-RPM drill motor?

Cobalt steel retains hardness at elevated temperatures better than standard high-speed steel, making it more forgiving when run at slower speeds that generate more heat.

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