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#29 Cobalt 135 Deg. Jobber Length Drill Bit

  • Zoro #: G0124719
  • Mfr #: R89CON29

$2.37 /ea

Order in multiples of 12

  • Drill Bit Material: Cobalt
  • Coolant Through: No
  • Material: Cobalt
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Precision Twist Drill #R89CON29 Specifications

  • Zoro #: G0124719
  • Mfr #: R89CON29
Drill Bit Material: Cobalt Coolant Through: No
Material: Cobalt Cutting Direction: Right Hand
Drill Bit Finish: Bronze Oxide Drill Bit Dimension Type: Wire
Drill Bit Size: #29 Item: HSS-E Jobber Drill,Bronze,N29
Point Type: Self Centering Split Point Drill Bit Point Angle: 135 Degrees
Shank Dia.: 0.1360" Drill Bit Grouping: Drill Bit
Number of Pieces: 1 Country of Origin (subject to change): Brazil
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The Precision Twist R89CO jobber-length drill bit is a 135-degree split-point, heavy-duty, round shank drill bit made of high speed steel (HSS) and cobalt with a gold oxide finish. They meet NAS 907 Type D, aircraft industry specifications for heat resistance and use for drilling hard, tough materials. Best performance with 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 R89CO series was designed for aircraft industry, they also work well for drilling into a variety of materials. The 135-degree split-point drill geometry ensure an accurate hole by reducing walking when the hole is started. The finish retains lubricants to aid in wear resistance and chip flow. The R89CO 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. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. Made of HSS with cobalt, many times harder/stiffer than HSS, will hold an edge longer, and will deflect less than HSS. These are also more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds. They are made to ANSI (fractional sizing) and NAS 907 type D industry standards, which ensure that drill bits around the world conform to the same specifications. and away from the cutting edge.


Restrictions and Compliance

WARNING : Cancer and Reproductive Harm -

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