Skip to Main Content

Customer Service From Real People.

We’re here to help! Call (855) 289-9676

3/64" Cobalt 135 Deg. Jobber Length Drill Bit

  • Zoro #: G0112581
  • Mfr #: R10CO3/64

$1.68 /ea

Order in multiples of 5

  • Cutting Direction: Right Hand
  • Point Type: Self Centering Split Point
  • Drill Bit Size: 3/64"
See full product details
  • Orders over $50 ship free.
  • Shipping & Returns
  • Sign up for Zmail and get 15% off your first order

Precision Twist Drill #R10CO3/64 Specifications

  • Zoro #: G0112581
  • Mfr #: R10CO3/64
Cutting Direction: Right Hand Point Type: Self Centering Split Point
Drill Bit Size: 3/64" Drill Bit Finish: Bronze Oxide
Coolant Through: No Drill Bit Dimension Type: Fractional Inch
Drill Bit Point Angle: 135 Degrees Drill Bit Material: Cobalt
Shank Dia.: 3/64" Drill Bit Grouping: Drill Bit
Item: HSS-E Jobber Drill,Bronze,3/64" Material: Cobalt
Country of Origin (subject to change): France
Feedback Help us improve our product information


The Precision Twist R10CO jobber-length drill bit is a 135-degree, spilt-point, heavy-duty, round shank drill bit made of HSS and cobalt with a gold oxide finish. For best performance, use for drilling into hardened, tempered alloy steel, nodular graphite malleable cast iron, titanium, and alloyed nickel. It is suitable for drilling to a depth up to four times the diameter of the drill. The shank diameter is the same as the drill size. While the R10CO series was designed for the aircraft industry, it also works well for drilling into a variety of materials. The jobber length and 135-degree split-point drill geometry provide good reach and ensure a more accurate hole by reducing walking when the hole is started. The finish retains lubricant to aid in wear resistance and chip flow. The R10CO series has a type N flute form (a regular helix angle of 21 to 34 degrees). The gold oxide is a low temperature heat treatment which reduces grinding stress within the tool, and has an appealing, easy-to-identify gold color. Gold oxide is commonly used to identify cobalt steel tools. Made of HSS with cobalt which is many times harder/stiffer than HSS, will hold an edge longer, and will deflect less than HSS. They are also more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds. and away from the cutting edge. They are made to ANSI (fractional sizing) and NAS type J standards, which ensure that drill bits around the world conform to the same specifications.


Restrictions and Compliance

WARNING : Cancer and Reproductive Harm -

Reviews of Precision Twist Drill #R10CO3/64